Abstract

We have studied the optical properties of a hybrid system consisting of cyanine dye J-aggregates attached to a spherical microcavity. A periodic structure of narrow peaks was observed in the photoluminescence spectrum of the J-aggregates, arising from the coupling between the emission of J-aggregates and the whispering gallery modes (WGMs) of the microcavity. The most striking result of our study is the observation of polarization sensitive mode damping caused by re-absorption of J-aggregate emission. This effect manifests itself in dominating emission from TM modes in the spectral region of J-aggregates absorption band where the TE modes are strongly suppressed. In contrast, the TE modes totally dominate emission spectrum in the region where absorption is negligible. We also demonstrate that the emission intensity can be further enhanced by depositing a hybrid layer of J-aggregates and Ag nanoparticles onto the spherical microcavity. Owing to the concerted action of WGMs and plasmonic hot spots in the Ag aggregates, we observe an enhanced Raman signal from the J-aggregates. Microcavities covered by J-aggregates and plasmonic nanoparticles could be thus useful for a variety of photonic applications in basic science and technology.

© 2011 OSA

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    [CrossRef] [PubMed]
  5. K. Yamaguchi, T. Niimi, M. Haraguchi, T. Okamoto, and M. Fukui, “Fabrication and Optical Evaluation of Silica Microsphere Coated with J-Aggregates,” Jpn. J. Appl. Phys. 45(8B), 6750–6753 (2006).
    [CrossRef]
  6. A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
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    [CrossRef]
  9. F. C. Spano, “The Spectral Signatures of Frenkel Polarons in H- and J-Aggregates,” Acc. Chem. Res. 43(3), 429–439 (2010).
    [CrossRef] [PubMed]
  10. Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
    [CrossRef]
  11. F. C. Spano and S. Mukamel, “Superradiance in molecular aggregates,” J. Chem. Phys. 91(2), 683–700 (1989).
    [CrossRef]
  12. E. W. Knapp, “Lineshapes of molecular aggregates, exchange narrowing and intersite correlation,” Chem. Phys. 85, 73–82 (1984).
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    [CrossRef]
  14. A. I. Plekhanov and V. V. Shelkovnikov, “Optical Constants of Nanofilms of J Aggregates of Organic dyes, Measured by Spectral Ellipsometry and Polarization Reflectometry,” Opt. Spectrosc. 104(4), 545–551 (2008).
    [CrossRef]
  15. I. Teraoka and S. Arnold, “Enhancing the sensitivity of a whispering-gallery mode microsphere sensor by a high-refractive-index surface layer,” J. Opt. Soc. Am. B 23(7), 1434–1441 (2006).
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    [CrossRef]
  18. S. Juodkazis, K. Fujiwara, T. Takahashi, S. Matsuo, and H. Misawa, “Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity,” J. Appl. Phys. 91(3), 916–921 (2002).
    [CrossRef]
  19. P. G. Schiro and A. S. Kwok, “Cavity-enhanced emission from a dye-coated microsphere,” Opt. Express 12(13), 2857–2863 (2004).
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  20. Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
    [CrossRef]
  21. S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).
  22. M. V. Artemyev and U. Woggon, “Quantum dots in photonic dots,” Appl. Phys. Lett. 76(11), 1353–1355 (2000).
    [CrossRef]
  23. S. Schietinger and O. Benson, “Coupling single NV-centres to high-Q whispering gallery modes of a preselected frequency-matched microresonator,” J. Phys. At. Mol. Opt. Phys. 42(11), 114001 (2009).
    [CrossRef]
  24. V. R. Dantham and P. B. Bisht, “Modification of radiative rates of molecules coated on a single microcavity by evanescent coupling of whispering gallery modes,” Eur. Phys. J. Appl. Phys. 51(2), 20902 (2010).
    [CrossRef]
  25. S. Holler, N. L. Goddard, and S. Arnold, “Spontaneous emission spectra from microdroplets,” J. Chem. Phys. 108(16), 6545–6547 (1998).
    [CrossRef]
  26. H. von Berlepsch, C. Bottcher, and L. Dahne, “Structure of J-Aggregates of Pseudoisocyanine Dye in Aqueous Solution,” J. Phys. Chem. B 104(37), 8792–8799 (2000).
    [CrossRef]
  27. B. Herzog, K. Huber, and H. Stegemeyer, “Aggregation of a Pseudoisocyanine Chloride in Aqueous NaCl Solution,” Langmuir 19(13), 5223–5232 (2003).
    [CrossRef]
  28. W. Kim, V. P. Safonov, V. M. Shalaev, and R. L. Armstrong, “Fractals in Microcavities: Giant Coupled, Multiplicative Enhancement of Optical Responses,” Phys. Rev. Lett. 82(24), 4811–4814 (1999).
    [CrossRef]
  29. I. M. White, J. G. Gohring, and X. Fan, “SERS-based detection in an optofluidic ring resonator platform,” Opt. Express 15(25), 17433–17442 (2007).
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  30. I. M. White, H. Oveys, and X. D. Fan, “Increasing the enhancement of SERS with dielectric microsphere resonators,” Spectroscopy 21, 1–5 (2006).
  31. B. Trösken, F. Willig, K. Schwarzburg, A. Ehret, and M. Spitler, “The primary steps in photography: Excited J-aggregates on AgBr Microcrystals,” Adv. Mater. (Deerfield Beach Fla.) 7, 448–450 (1995).
    [CrossRef]
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    [CrossRef]
  34. L. K. Ausman and G. C. Schatz, “Whispering-gallery mode resonators: Surface enhanced Raman scattering without plasmons,” J. Chem. Phys. 129(5), 054704 (2008).
    [CrossRef] [PubMed]

2010

Y. P. Rakovich and J. F. Donegan, “Photonic atoms and molecules,” Laser Photonics Rev. 4(2), 179–191 (2010).
[CrossRef]

F. C. Spano, “The Spectral Signatures of Frenkel Polarons in H- and J-Aggregates,” Acc. Chem. Res. 43(3), 429–439 (2010).
[CrossRef] [PubMed]

V. R. Dantham and P. B. Bisht, “Modification of radiative rates of molecules coated on a single microcavity by evanescent coupling of whispering gallery modes,” Eur. Phys. J. Appl. Phys. 51(2), 20902 (2010).
[CrossRef]

2009

S. Schietinger and O. Benson, “Coupling single NV-centres to high-Q whispering gallery modes of a preselected frequency-matched microresonator,” J. Phys. At. Mol. Opt. Phys. 42(11), 114001 (2009).
[CrossRef]

2008

A. I. Plekhanov and V. V. Shelkovnikov, “Optical Constants of Nanofilms of J Aggregates of Organic dyes, Measured by Spectral Ellipsometry and Polarization Reflectometry,” Opt. Spectrosc. 104(4), 545–551 (2008).
[CrossRef]

N. T. Fofang, T.-H. Park, O. Neumann, N. A. Mirin, P. Nordlander, and N. J. Halas, “Plexcitonic Nanoparticles: Plasmon-Exciton Coupling in Nanoshell-J-Aggregate Complexes,” Nano Lett. 8(10), 3481–3487 (2008).
[CrossRef] [PubMed]

L. K. Ausman and G. C. Schatz, “Whispering-gallery mode resonators: Surface enhanced Raman scattering without plasmons,” J. Chem. Phys. 129(5), 054704 (2008).
[CrossRef] [PubMed]

2007

2006

I. Teraoka and S. Arnold, “Enhancing the sensitivity of a whispering-gallery mode microsphere sensor by a high-refractive-index surface layer,” J. Opt. Soc. Am. B 23(7), 1434–1441 (2006).
[CrossRef]

I. M. White, H. Oveys, and X. D. Fan, “Increasing the enhancement of SERS with dielectric microsphere resonators,” Spectroscopy 21, 1–5 (2006).

K. Yamaguchi, T. Niimi, M. Haraguchi, T. Okamoto, and M. Fukui, “Fabrication and Optical Evaluation of Silica Microsphere Coated with J-Aggregates,” Jpn. J. Appl. Phys. 45(8B), 6750–6753 (2006).
[CrossRef]

Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
[CrossRef]

2004

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

P. G. Schiro and A. S. Kwok, “Cavity-enhanced emission from a dye-coated microsphere,” Opt. Express 12(13), 2857–2863 (2004).
[CrossRef] [PubMed]

2003

B. Herzog, K. Huber, and H. Stegemeyer, “Aggregation of a Pseudoisocyanine Chloride in Aqueous NaCl Solution,” Langmuir 19(13), 5223–5232 (2003).
[CrossRef]

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

2002

C. Guo, M. Aydin, H.-R. Zhu, and D. L. Akins, “Density Functional Theory Used in Structure Determinations and Raman Band Assignments for Pseudoisocyanine and its Aggregate,” J. Phys. Chem. B 106(21), 5447–5454 (2002).
[CrossRef]

S. Juodkazis, K. Fujiwara, T. Takahashi, S. Matsuo, and H. Misawa, “Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity,” J. Appl. Phys. 91(3), 916–921 (2002).
[CrossRef]

2001

S. Arnold, “Microspheres, Photonic Atoms and the Physics of Nothing,” Am. Sci. 89, 414–421 (2001).

C. Peyratout, C. Donath, and L. Daehne, “Electrostatic interactions of cationic dyes with negatively charged polyelectrolytes in aqueous solution,” J. Photochem. Photobiol., A 142(1), 51–57 (2001).
[CrossRef]

2000

M. V. Artemyev and U. Woggon, “Quantum dots in photonic dots,” Appl. Phys. Lett. 76(11), 1353–1355 (2000).
[CrossRef]

M.-L. Horng and E. L. Quitevis, “Visible Absorption Spectroscopy and Structure of Cyanine Dimers in Aqueous Solution,” J. Chem. Educ. 77(5), 637–639 (2000).
[CrossRef]

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

H. von Berlepsch, C. Bottcher, and L. Dahne, “Structure of J-Aggregates of Pseudoisocyanine Dye in Aqueous Solution,” J. Phys. Chem. B 104(37), 8792–8799 (2000).
[CrossRef]

1999

W. Kim, V. P. Safonov, V. M. Shalaev, and R. L. Armstrong, “Fractals in Microcavities: Giant Coupled, Multiplicative Enhancement of Optical Responses,” Phys. Rev. Lett. 82(24), 4811–4814 (1999).
[CrossRef]

V. Chernyak, T. Meier, E. Tsiper, and S. Mukamel, “Scaling of Fluorescence Stokes Shift and Superradiance Coherence Size in Disordered Molecular Aggregates,” J. Phys. Chem. A 103(49), 10294–10299 (1999).
[CrossRef]

1998

S. Holler, N. L. Goddard, and S. Arnold, “Spontaneous emission spectra from microdroplets,” J. Chem. Phys. 108(16), 6545–6547 (1998).
[CrossRef]

1995

B. Trösken, F. Willig, K. Schwarzburg, A. Ehret, and M. Spitler, “The primary steps in photography: Excited J-aggregates on AgBr Microcrystals,” Adv. Mater. (Deerfield Beach Fla.) 7, 448–450 (1995).
[CrossRef]

1992

1989

F. C. Spano and S. Mukamel, “Superradiance in molecular aggregates,” J. Chem. Phys. 91(2), 683–700 (1989).
[CrossRef]

1984

E. W. Knapp, “Lineshapes of molecular aggregates, exchange narrowing and intersite correlation,” Chem. Phys. 85, 73–82 (1984).

Akins, D. L.

C. Guo, M. Aydin, H.-R. Zhu, and D. L. Akins, “Density Functional Theory Used in Structure Determinations and Raman Band Assignments for Pseudoisocyanine and its Aggregate,” J. Phys. Chem. B 106(21), 5447–5454 (2002).
[CrossRef]

Akutagawa, Y.

Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
[CrossRef]

Armstrong, R. L.

W. Kim, V. P. Safonov, V. M. Shalaev, and R. L. Armstrong, “Fractals in Microcavities: Giant Coupled, Multiplicative Enhancement of Optical Responses,” Phys. Rev. Lett. 82(24), 4811–4814 (1999).
[CrossRef]

Arnold, S.

I. Teraoka and S. Arnold, “Enhancing the sensitivity of a whispering-gallery mode microsphere sensor by a high-refractive-index surface layer,” J. Opt. Soc. Am. B 23(7), 1434–1441 (2006).
[CrossRef]

S. Arnold, “Microspheres, Photonic Atoms and the Physics of Nothing,” Am. Sci. 89, 414–421 (2001).

S. Holler, N. L. Goddard, and S. Arnold, “Spontaneous emission spectra from microdroplets,” J. Chem. Phys. 108(16), 6545–6547 (1998).
[CrossRef]

Artemyev, M. V.

M. V. Artemyev and U. Woggon, “Quantum dots in photonic dots,” Appl. Phys. Lett. 76(11), 1353–1355 (2000).
[CrossRef]

Ausman, L. K.

L. K. Ausman and G. C. Schatz, “Whispering-gallery mode resonators: Surface enhanced Raman scattering without plasmons,” J. Chem. Phys. 129(5), 054704 (2008).
[CrossRef] [PubMed]

Aydin, M.

C. Guo, M. Aydin, H.-R. Zhu, and D. L. Akins, “Density Functional Theory Used in Structure Determinations and Raman Band Assignments for Pseudoisocyanine and its Aggregate,” J. Phys. Chem. B 106(21), 5447–5454 (2002).
[CrossRef]

Benson, O.

S. Schietinger and O. Benson, “Coupling single NV-centres to high-Q whispering gallery modes of a preselected frequency-matched microresonator,” J. Phys. At. Mol. Opt. Phys. 42(11), 114001 (2009).
[CrossRef]

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

Bisht, P. B.

V. R. Dantham and P. B. Bisht, “Modification of radiative rates of molecules coated on a single microcavity by evanescent coupling of whispering gallery modes,” Eur. Phys. J. Appl. Phys. 51(2), 20902 (2010).
[CrossRef]

Bottcher, C.

H. von Berlepsch, C. Bottcher, and L. Dahne, “Structure of J-Aggregates of Pseudoisocyanine Dye in Aqueous Solution,” J. Phys. Chem. B 104(37), 8792–8799 (2000).
[CrossRef]

Caruso, F.

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Chernyak, V.

V. Chernyak, T. Meier, E. Tsiper, and S. Mukamel, “Scaling of Fluorescence Stokes Shift and Superradiance Coherence Size in Disordered Molecular Aggregates,” J. Phys. Chem. A 103(49), 10294–10299 (1999).
[CrossRef]

Daehne, L.

C. Peyratout, C. Donath, and L. Daehne, “Electrostatic interactions of cationic dyes with negatively charged polyelectrolytes in aqueous solution,” J. Photochem. Photobiol., A 142(1), 51–57 (2001).
[CrossRef]

Dahne, L.

H. von Berlepsch, C. Bottcher, and L. Dahne, “Structure of J-Aggregates of Pseudoisocyanine Dye in Aqueous Solution,” J. Phys. Chem. B 104(37), 8792–8799 (2000).
[CrossRef]

Dantham, V. R.

V. R. Dantham and P. B. Bisht, “Modification of radiative rates of molecules coated on a single microcavity by evanescent coupling of whispering gallery modes,” Eur. Phys. J. Appl. Phys. 51(2), 20902 (2010).
[CrossRef]

Donath, C.

C. Peyratout, C. Donath, and L. Daehne, “Electrostatic interactions of cationic dyes with negatively charged polyelectrolytes in aqueous solution,” J. Photochem. Photobiol., A 142(1), 51–57 (2001).
[CrossRef]

Donegan, J. F.

Y. P. Rakovich and J. F. Donegan, “Photonic atoms and molecules,” Laser Photonics Rev. 4(2), 179–191 (2010).
[CrossRef]

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Ehret, A.

B. Trösken, F. Willig, K. Schwarzburg, A. Ehret, and M. Spitler, “The primary steps in photography: Excited J-aggregates on AgBr Microcrystals,” Adv. Mater. (Deerfield Beach Fla.) 7, 448–450 (1995).
[CrossRef]

Eychmüller, A.

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Fan, X.

Fan, X. D.

I. M. White, H. Oveys, and X. D. Fan, “Increasing the enhancement of SERS with dielectric microsphere resonators,” Spectroscopy 21, 1–5 (2006).

Fofang, N. T.

N. T. Fofang, T.-H. Park, O. Neumann, N. A. Mirin, P. Nordlander, and N. J. Halas, “Plexcitonic Nanoparticles: Plasmon-Exciton Coupling in Nanoshell-J-Aggregate Complexes,” Nano Lett. 8(10), 3481–3487 (2008).
[CrossRef] [PubMed]

Fujiwara, K.

S. Juodkazis, K. Fujiwara, T. Takahashi, S. Matsuo, and H. Misawa, “Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity,” J. Appl. Phys. 91(3), 916–921 (2002).
[CrossRef]

Fukui, M.

K. Yamaguchi, T. Niimi, M. Haraguchi, T. Okamoto, and M. Fukui, “Fabrication and Optical Evaluation of Silica Microsphere Coated with J-Aggregates,” Jpn. J. Appl. Phys. 45(8B), 6750–6753 (2006).
[CrossRef]

Gaponik, N.

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Giersig, M.

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Goddard, N. L.

S. Holler, N. L. Goddard, and S. Arnold, “Spontaneous emission spectra from microdroplets,” J. Chem. Phys. 108(16), 6545–6547 (1998).
[CrossRef]

Gohring, J. G.

Götzinger, S.

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

Guo, C.

C. Guo, M. Aydin, H.-R. Zhu, and D. L. Akins, “Density Functional Theory Used in Structure Determinations and Raman Band Assignments for Pseudoisocyanine and its Aggregate,” J. Phys. Chem. B 106(21), 5447–5454 (2002).
[CrossRef]

Halas, N. J.

N. T. Fofang, T.-H. Park, O. Neumann, N. A. Mirin, P. Nordlander, and N. J. Halas, “Plexcitonic Nanoparticles: Plasmon-Exciton Coupling in Nanoshell-J-Aggregate Complexes,” Nano Lett. 8(10), 3481–3487 (2008).
[CrossRef] [PubMed]

Haraguchi, M.

K. Yamaguchi, T. Niimi, M. Haraguchi, T. Okamoto, and M. Fukui, “Fabrication and Optical Evaluation of Silica Microsphere Coated with J-Aggregates,” Jpn. J. Appl. Phys. 45(8B), 6750–6753 (2006).
[CrossRef]

Herzog, B.

B. Herzog, K. Huber, and H. Stegemeyer, “Aggregation of a Pseudoisocyanine Chloride in Aqueous NaCl Solution,” Langmuir 19(13), 5223–5232 (2003).
[CrossRef]

Holler, S.

S. Holler, N. L. Goddard, and S. Arnold, “Spontaneous emission spectra from microdroplets,” J. Chem. Phys. 108(16), 6545–6547 (1998).
[CrossRef]

Horng, M.-L.

M.-L. Horng and E. L. Quitevis, “Visible Absorption Spectroscopy and Structure of Cyanine Dimers in Aqueous Solution,” J. Chem. Educ. 77(5), 637–639 (2000).
[CrossRef]

Huber, K.

B. Herzog, K. Huber, and H. Stegemeyer, “Aggregation of a Pseudoisocyanine Chloride in Aqueous NaCl Solution,” Langmuir 19(13), 5223–5232 (2003).
[CrossRef]

Juodkazis, S.

S. Juodkazis, K. Fujiwara, T. Takahashi, S. Matsuo, and H. Misawa, “Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity,” J. Appl. Phys. 91(3), 916–921 (2002).
[CrossRef]

Kim, W.

W. Kim, V. P. Safonov, V. M. Shalaev, and R. L. Armstrong, “Fractals in Microcavities: Giant Coupled, Multiplicative Enhancement of Optical Responses,” Phys. Rev. Lett. 82(24), 4811–4814 (1999).
[CrossRef]

Knapp, E. W.

E. W. Knapp, “Lineshapes of molecular aggregates, exchange narrowing and intersite correlation,” Chem. Phys. 85, 73–82 (1984).

Kornowski, A.

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Kurita, S.

Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
[CrossRef]

Kwok, A. S.

Lam, C. C.

Leung, P. T.

Matsuo, S.

S. Juodkazis, K. Fujiwara, T. Takahashi, S. Matsuo, and H. Misawa, “Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity,” J. Appl. Phys. 91(3), 916–921 (2002).
[CrossRef]

McCabe, E. M.

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Meier, T.

V. Chernyak, T. Meier, E. Tsiper, and S. Mukamel, “Scaling of Fluorescence Stokes Shift and Superradiance Coherence Size in Disordered Molecular Aggregates,” J. Phys. Chem. A 103(49), 10294–10299 (1999).
[CrossRef]

Menezes, L. de S.

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

Mirin, N. A.

N. T. Fofang, T.-H. Park, O. Neumann, N. A. Mirin, P. Nordlander, and N. J. Halas, “Plexcitonic Nanoparticles: Plasmon-Exciton Coupling in Nanoshell-J-Aggregate Complexes,” Nano Lett. 8(10), 3481–3487 (2008).
[CrossRef] [PubMed]

Misawa, H.

S. Juodkazis, K. Fujiwara, T. Takahashi, S. Matsuo, and H. Misawa, “Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity,” J. Appl. Phys. 91(3), 916–921 (2002).
[CrossRef]

Miyasue, K.

Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
[CrossRef]

Möhwald, H.

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Moore, A.

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Mukamel, S.

V. Chernyak, T. Meier, E. Tsiper, and S. Mukamel, “Scaling of Fluorescence Stokes Shift and Superradiance Coherence Size in Disordered Molecular Aggregates,” J. Phys. Chem. A 103(49), 10294–10299 (1999).
[CrossRef]

F. C. Spano and S. Mukamel, “Superradiance in molecular aggregates,” J. Chem. Phys. 91(2), 683–700 (1989).
[CrossRef]

Nakajima, M.

Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
[CrossRef]

Neumann, O.

N. T. Fofang, T.-H. Park, O. Neumann, N. A. Mirin, P. Nordlander, and N. J. Halas, “Plexcitonic Nanoparticles: Plasmon-Exciton Coupling in Nanoshell-J-Aggregate Complexes,” Nano Lett. 8(10), 3481–3487 (2008).
[CrossRef] [PubMed]

Niimi, T.

K. Yamaguchi, T. Niimi, M. Haraguchi, T. Okamoto, and M. Fukui, “Fabrication and Optical Evaluation of Silica Microsphere Coated with J-Aggregates,” Jpn. J. Appl. Phys. 45(8B), 6750–6753 (2006).
[CrossRef]

Nordlander, P.

N. T. Fofang, T.-H. Park, O. Neumann, N. A. Mirin, P. Nordlander, and N. J. Halas, “Plexcitonic Nanoparticles: Plasmon-Exciton Coupling in Nanoshell-J-Aggregate Complexes,” Nano Lett. 8(10), 3481–3487 (2008).
[CrossRef] [PubMed]

Okamoto, T.

K. Yamaguchi, T. Niimi, M. Haraguchi, T. Okamoto, and M. Fukui, “Fabrication and Optical Evaluation of Silica Microsphere Coated with J-Aggregates,” Jpn. J. Appl. Phys. 45(8B), 6750–6753 (2006).
[CrossRef]

Oveys, H.

I. M. White, H. Oveys, and X. D. Fan, “Increasing the enhancement of SERS with dielectric microsphere resonators,” Spectroscopy 21, 1–5 (2006).

Park, T.-H.

N. T. Fofang, T.-H. Park, O. Neumann, N. A. Mirin, P. Nordlander, and N. J. Halas, “Plexcitonic Nanoparticles: Plasmon-Exciton Coupling in Nanoshell-J-Aggregate Complexes,” Nano Lett. 8(10), 3481–3487 (2008).
[CrossRef] [PubMed]

Perova, T.

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Peyratout, C.

C. Peyratout, C. Donath, and L. Daehne, “Electrostatic interactions of cationic dyes with negatively charged polyelectrolytes in aqueous solution,” J. Photochem. Photobiol., A 142(1), 51–57 (2001).
[CrossRef]

Plekhanov, A. I.

A. I. Plekhanov and V. V. Shelkovnikov, “Optical Constants of Nanofilms of J Aggregates of Organic dyes, Measured by Spectral Ellipsometry and Polarization Reflectometry,” Opt. Spectrosc. 104(4), 545–551 (2008).
[CrossRef]

Quitevis, E. L.

M.-L. Horng and E. L. Quitevis, “Visible Absorption Spectroscopy and Structure of Cyanine Dimers in Aqueous Solution,” J. Chem. Educ. 77(5), 637–639 (2000).
[CrossRef]

Rakovich, Y. P.

Y. P. Rakovich and J. F. Donegan, “Photonic atoms and molecules,” Laser Photonics Rev. 4(2), 179–191 (2010).
[CrossRef]

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Rogach, A.

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Rogach, A. L.

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Rogach, A.L.

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

Safonov, V. P.

W. Kim, V. P. Safonov, V. M. Shalaev, and R. L. Armstrong, “Fractals in Microcavities: Giant Coupled, Multiplicative Enhancement of Optical Responses,” Phys. Rev. Lett. 82(24), 4811–4814 (1999).
[CrossRef]

Sandoghdar, V.

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

Schatz, G. C.

L. K. Ausman and G. C. Schatz, “Whispering-gallery mode resonators: Surface enhanced Raman scattering without plasmons,” J. Chem. Phys. 129(5), 054704 (2008).
[CrossRef] [PubMed]

Schietinger, S.

S. Schietinger and O. Benson, “Coupling single NV-centres to high-Q whispering gallery modes of a preselected frequency-matched microresonator,” J. Phys. At. Mol. Opt. Phys. 42(11), 114001 (2009).
[CrossRef]

Schiro, P. G.

Schwarzburg, K.

B. Trösken, F. Willig, K. Schwarzburg, A. Ehret, and M. Spitler, “The primary steps in photography: Excited J-aggregates on AgBr Microcrystals,” Adv. Mater. (Deerfield Beach Fla.) 7, 448–450 (1995).
[CrossRef]

Sekiya, T.

Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
[CrossRef]

Shalaev, V. M.

W. Kim, V. P. Safonov, V. M. Shalaev, and R. L. Armstrong, “Fractals in Microcavities: Giant Coupled, Multiplicative Enhancement of Optical Responses,” Phys. Rev. Lett. 82(24), 4811–4814 (1999).
[CrossRef]

Shelkovnikov, V. V.

A. I. Plekhanov and V. V. Shelkovnikov, “Optical Constants of Nanofilms of J Aggregates of Organic dyes, Measured by Spectral Ellipsometry and Polarization Reflectometry,” Opt. Spectrosc. 104(4), 545–551 (2008).
[CrossRef]

Spano, F. C.

F. C. Spano, “The Spectral Signatures of Frenkel Polarons in H- and J-Aggregates,” Acc. Chem. Res. 43(3), 429–439 (2010).
[CrossRef] [PubMed]

F. C. Spano and S. Mukamel, “Superradiance in molecular aggregates,” J. Chem. Phys. 91(2), 683–700 (1989).
[CrossRef]

Spitler, M.

B. Trösken, F. Willig, K. Schwarzburg, A. Ehret, and M. Spitler, “The primary steps in photography: Excited J-aggregates on AgBr Microcrystals,” Adv. Mater. (Deerfield Beach Fla.) 7, 448–450 (1995).
[CrossRef]

Stegemeyer, H.

B. Herzog, K. Huber, and H. Stegemeyer, “Aggregation of a Pseudoisocyanine Chloride in Aqueous NaCl Solution,” Langmuir 19(13), 5223–5232 (2003).
[CrossRef]

Suemoto, T.

Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
[CrossRef]

Sukhorukov, G. B.

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Susha, A. S.

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Takahashi, T.

S. Juodkazis, K. Fujiwara, T. Takahashi, S. Matsuo, and H. Misawa, “Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity,” J. Appl. Phys. 91(3), 916–921 (2002).
[CrossRef]

Talapin, D.V.

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

Teraoka, I.

Trösken, B.

B. Trösken, F. Willig, K. Schwarzburg, A. Ehret, and M. Spitler, “The primary steps in photography: Excited J-aggregates on AgBr Microcrystals,” Adv. Mater. (Deerfield Beach Fla.) 7, 448–450 (1995).
[CrossRef]

Tsiper, E.

V. Chernyak, T. Meier, E. Tsiper, and S. Mukamel, “Scaling of Fluorescence Stokes Shift and Superradiance Coherence Size in Disordered Molecular Aggregates,” J. Phys. Chem. A 103(49), 10294–10299 (1999).
[CrossRef]

von Berlepsch, H.

H. von Berlepsch, C. Bottcher, and L. Dahne, “Structure of J-Aggregates of Pseudoisocyanine Dye in Aqueous Solution,” J. Phys. Chem. B 104(37), 8792–8799 (2000).
[CrossRef]

Weller, H.

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

White, I. M.

I. M. White, J. G. Gohring, and X. Fan, “SERS-based detection in an optofluidic ring resonator platform,” Opt. Express 15(25), 17433–17442 (2007).
[CrossRef] [PubMed]

I. M. White, H. Oveys, and X. D. Fan, “Increasing the enhancement of SERS with dielectric microsphere resonators,” Spectroscopy 21, 1–5 (2006).

Willig, F.

B. Trösken, F. Willig, K. Schwarzburg, A. Ehret, and M. Spitler, “The primary steps in photography: Excited J-aggregates on AgBr Microcrystals,” Adv. Mater. (Deerfield Beach Fla.) 7, 448–450 (1995).
[CrossRef]

Woggon, U.

M. V. Artemyev and U. Woggon, “Quantum dots in photonic dots,” Appl. Phys. Lett. 76(11), 1353–1355 (2000).
[CrossRef]

Yamaguchi, K.

K. Yamaguchi, T. Niimi, M. Haraguchi, T. Okamoto, and M. Fukui, “Fabrication and Optical Evaluation of Silica Microsphere Coated with J-Aggregates,” Jpn. J. Appl. Phys. 45(8B), 6750–6753 (2006).
[CrossRef]

Yang, L.

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Young, K.

Zhu, H.-R.

C. Guo, M. Aydin, H.-R. Zhu, and D. L. Akins, “Density Functional Theory Used in Structure Determinations and Raman Band Assignments for Pseudoisocyanine and its Aggregate,” J. Phys. Chem. B 106(21), 5447–5454 (2002).
[CrossRef]

Acc. Chem. Res.

F. C. Spano, “The Spectral Signatures of Frenkel Polarons in H- and J-Aggregates,” Acc. Chem. Res. 43(3), 429–439 (2010).
[CrossRef] [PubMed]

Adv. Mater. (Deerfield Beach Fla.)

B. Trösken, F. Willig, K. Schwarzburg, A. Ehret, and M. Spitler, “The primary steps in photography: Excited J-aggregates on AgBr Microcrystals,” Adv. Mater. (Deerfield Beach Fla.) 7, 448–450 (1995).
[CrossRef]

Am. Sci.

S. Arnold, “Microspheres, Photonic Atoms and the Physics of Nothing,” Am. Sci. 89, 414–421 (2001).

Appl. Phys. Lett.

M. V. Artemyev and U. Woggon, “Quantum dots in photonic dots,” Appl. Phys. Lett. 76(11), 1353–1355 (2000).
[CrossRef]

Chem. Phys.

E. W. Knapp, “Lineshapes of molecular aggregates, exchange narrowing and intersite correlation,” Chem. Phys. 85, 73–82 (1984).

Colloids Surf. A

A. S. Susha, F. Caruso, A. L. Rogach, G. B. Sukhorukov, A. Kornowski, H. Möhwald, M. Giersig, A. Eychmüller, and H. Weller, “Formation of luminescent spherical core-shell particles by the consecutive adsorption of polyelectrolyte and CdTe(S) nanocrystals on latex colloids,” Colloids Surf. A 163(1), 39–44 (2000).
[CrossRef]

Eur. Phys. J. Appl. Phys.

V. R. Dantham and P. B. Bisht, “Modification of radiative rates of molecules coated on a single microcavity by evanescent coupling of whispering gallery modes,” Eur. Phys. J. Appl. Phys. 51(2), 20902 (2010).
[CrossRef]

J. Appl. Phys.

S. Juodkazis, K. Fujiwara, T. Takahashi, S. Matsuo, and H. Misawa, “Morphology-dependent resonant laser emission of dye-doped ellipsoidal microcavity,” J. Appl. Phys. 91(3), 916–921 (2002).
[CrossRef]

J. Chem. Educ.

M.-L. Horng and E. L. Quitevis, “Visible Absorption Spectroscopy and Structure of Cyanine Dimers in Aqueous Solution,” J. Chem. Educ. 77(5), 637–639 (2000).
[CrossRef]

J. Chem. Phys.

F. C. Spano and S. Mukamel, “Superradiance in molecular aggregates,” J. Chem. Phys. 91(2), 683–700 (1989).
[CrossRef]

S. Holler, N. L. Goddard, and S. Arnold, “Spontaneous emission spectra from microdroplets,” J. Chem. Phys. 108(16), 6545–6547 (1998).
[CrossRef]

L. K. Ausman and G. C. Schatz, “Whispering-gallery mode resonators: Surface enhanced Raman scattering without plasmons,” J. Chem. Phys. 129(5), 054704 (2008).
[CrossRef] [PubMed]

J. Opt. B: Quantum Semiclassical Opt.

S. Götzinger, L. de S. Menezes, O. Benson, D.V. Talapin, N. Gaponik, H. Weller, A.L. Rogach, and V. Sandoghdar, “Confocal microscopy and spectroscopy of nanocrystals on a high-Q microsphere resonator,” J. Opt. B: Quantum Semiclassical Opt. 6, 154–158 (2004).

J. Opt. Soc. Am. B

J. Photochem. Photobiol., A

C. Peyratout, C. Donath, and L. Daehne, “Electrostatic interactions of cationic dyes with negatively charged polyelectrolytes in aqueous solution,” J. Photochem. Photobiol., A 142(1), 51–57 (2001).
[CrossRef]

J. Phys. At. Mol. Opt. Phys.

S. Schietinger and O. Benson, “Coupling single NV-centres to high-Q whispering gallery modes of a preselected frequency-matched microresonator,” J. Phys. At. Mol. Opt. Phys. 42(11), 114001 (2009).
[CrossRef]

J. Phys. Chem. A

V. Chernyak, T. Meier, E. Tsiper, and S. Mukamel, “Scaling of Fluorescence Stokes Shift and Superradiance Coherence Size in Disordered Molecular Aggregates,” J. Phys. Chem. A 103(49), 10294–10299 (1999).
[CrossRef]

J. Phys. Chem. B

H. von Berlepsch, C. Bottcher, and L. Dahne, “Structure of J-Aggregates of Pseudoisocyanine Dye in Aqueous Solution,” J. Phys. Chem. B 104(37), 8792–8799 (2000).
[CrossRef]

C. Guo, M. Aydin, H.-R. Zhu, and D. L. Akins, “Density Functional Theory Used in Structure Determinations and Raman Band Assignments for Pseudoisocyanine and its Aggregate,” J. Phys. Chem. B 106(21), 5447–5454 (2002).
[CrossRef]

Jpn. J. Appl. Phys.

K. Yamaguchi, T. Niimi, M. Haraguchi, T. Okamoto, and M. Fukui, “Fabrication and Optical Evaluation of Silica Microsphere Coated with J-Aggregates,” Jpn. J. Appl. Phys. 45(8B), 6750–6753 (2006).
[CrossRef]

Langmuir

B. Herzog, K. Huber, and H. Stegemeyer, “Aggregation of a Pseudoisocyanine Chloride in Aqueous NaCl Solution,” Langmuir 19(13), 5223–5232 (2003).
[CrossRef]

Laser Photonics Rev.

Y. P. Rakovich and J. F. Donegan, “Photonic atoms and molecules,” Laser Photonics Rev. 4(2), 179–191 (2010).
[CrossRef]

Nano Lett.

N. T. Fofang, T.-H. Park, O. Neumann, N. A. Mirin, P. Nordlander, and N. J. Halas, “Plexcitonic Nanoparticles: Plasmon-Exciton Coupling in Nanoshell-J-Aggregate Complexes,” Nano Lett. 8(10), 3481–3487 (2008).
[CrossRef] [PubMed]

Opt. Express

Opt. Spectrosc.

A. I. Plekhanov and V. V. Shelkovnikov, “Optical Constants of Nanofilms of J Aggregates of Organic dyes, Measured by Spectral Ellipsometry and Polarization Reflectometry,” Opt. Spectrosc. 104(4), 545–551 (2008).
[CrossRef]

Phys. Rev. Lett.

W. Kim, V. P. Safonov, V. M. Shalaev, and R. L. Armstrong, “Fractals in Microcavities: Giant Coupled, Multiplicative Enhancement of Optical Responses,” Phys. Rev. Lett. 82(24), 4811–4814 (1999).
[CrossRef]

Phys. Status Solidi C

Y. Akutagawa, K. Miyasue, T. Sekiya, S. Kurita, M. Nakajima, and T. Suemoto, “Time resolved response of luminescence on cyanine dye J-aggregate,” Phys. Status Solidi C 3(10), 3404–3407 (2006).
[CrossRef]

Semicond. Sci. Technol.

Y. P. Rakovich, L. Yang, E. M. McCabe, J. F. Donegan, T. Perova, A. Moore, N. Gaponik, and A. Rogach, “Whispering Gallery Mode Emission from a Composite System of CdTe Nanocrystals and a Spherical Microcavity,” Semicond. Sci. Technol. 18(11), 914–918 (2003).
[CrossRef]

Spectroscopy

I. M. White, H. Oveys, and X. D. Fan, “Increasing the enhancement of SERS with dielectric microsphere resonators,” Spectroscopy 21, 1–5 (2006).

Other

E. C. Le Ru and P. G. Etchegoin, Principles of Surface-Enhanced Raman Spectroscopy (Elsevier, 2009).

G. Decher and J. B. Schlenoff, Multilayer Thin Films: Sequential Assembly of Nanocomposite Materials (Wiley-VCH,Weinheim, 2002).

T. Kobayashi, ed., J-Aggregates (World Scientific, 1996).

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Figures (7)

Fig. 1
Fig. 1

a) Room-temperature absorption and PL spectra (λexc = 485 nm) of J-aggregates formed in aqueous solution of PIC by interaction with PSS. Insert: PL lifetime histogram obtained from the same sample (λexc = 485 nm, excitation power 0.05 µW). b) Absorption spectra for serial dilutions of the J-aggregate/PSS solution.

Fig. 2
Fig. 2

SEM image of part of 11.93 µm MF microsphere with PE spacer and shell of J-aggregates (a) and PL life time histograms detected from whole microsphere (b), from the rim of the microsphere (c) and from the central part of the microsphere (d). Inserts show corresponding scanning confocal FLIM images.

Fig. 3
Fig. 3

Room-temperature PL spectrum from single MF microsphere covered by monolayer of J-aggregates. Inserts show the results of mode identification using Eq. (2). Green and red squares indicate TM and TE modes of first order, respectively. Blue squares indicate TE modes of second order. As the dispersion of refractive index of MF is not known, the angular mode numbers are determined with accuracy ± 1. The ratio between T E 96 1 peak intensity and background emission is 1.5.

Fig. 4
Fig. 4

a) Spectral distribution of visibility V for TM and TE mode (a) in comparison with spectral profile of absorption (blue) and PL (green) band of J-aggregates in aqueous solution. Dashed lines in (a) are a visual guide.

Fig. 5
Fig. 5

SEM images of a MF microsphere with PE spacer Ag NPs.

Fig. 6
Fig. 6

Images of a MF microsphere with a PE spacer, covered with Ag NPs and a shell of J-aggregates: (a) Scanning electron microscopy image, (b) scanning confocal PL intensity image, (c) and (d) FLIM image with corresponding PL lifetime histogram.

Fig. 7
Fig. 7

Micro-PL spectra taken from a single MF microsphere covered with Ag NPs and adsorbed J-aggregates (1) and from a microsphere with shell of J-aggregates alone (2). The insert shows Raman spectra taken with higher resolution (1 cm−1) from a single microsphere covered with Ag NPs and adsorbed J-aggregates (3) and from a glass slide with Ag NPs and J-aggregates (4). The Raman spectra were measured in the wavelengths region between 540 and 585 nm. Because of the better spectral resolution one can see that the peaks centered at 569.4 nm 573.8 nm (curve 1) consist of two and three closely spaced peaks, respectively (curves 3 and 4).

Equations (2)

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N c =1.5× ( ΔM/ΔJ ) 2
n s x q n =ν+ α n 2 1/3 ν 1/3 mp m 2 1 + 3 α n 10× 2 2/3 ν 1/3 + m 3 p( 2 p 2 /31 ) α n 2 1/3 ( m 2 1 ) 3/2 ν 2 /3 +O( ν 1 ),

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