Abstract

We present a detailed analysis of nanoparticle trapping using plasmonic nanostructures, which predicts an improvement of two orders of magnitude in trapping force obtained by optimizing the plasmon resonance of the nanostructures. As the result, a total of four orders of magnitude enhancement in trapping force can be achieved comparing to the case without the nanostructures. In addition, it is illustrated that tuning the resonance wavelength is achievable by varying the diameter and/or the height of the nanorods.

© 2012 OSA

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    [CrossRef] [PubMed]
  3. B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
    [CrossRef] [PubMed]
  4. X. Gao and X. Gan, “Modulation of evanescent focus by localized surface plasmons waveguide,” Opt. Express 17(25), 22726–22734 (2009).
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  7. B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
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    [CrossRef] [PubMed]
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  29. R. Piazza and A. Parola, “Thermophoresis in colloidal suspensions,” J. Phys. Condens. Matter 20(15), 153102 (2008).
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  30. S. Duhr and D. Braun, “Why molecules move along a temperature gradient,” Proc. Natl. Acad. Sci. U.S.A. 103(52), 19678–19682 (2006).
    [CrossRef] [PubMed]
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  33. S. Buzzi, M. Galli, M. Agio, and J. F. Loffler, “Silver high-aspect-ratio micro- and nanoimprinting for optical applications,” Appl. Phys. Lett. 94(22), 223115 (2009).
    [CrossRef]

2012 (2)

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

C. Chen, M. L. Juan, Y. Li, G. Maes, G. Borghs, P. Van Dorpe, and R. Quidant, “Enhanced optical trapping and arrangement of nano-objects in a plasmonic nanocavity,” Nano Lett. 12(1), 125–132 (2012).
[CrossRef] [PubMed]

2011 (7)

A. E. Cetin, A. A. Yanik, C. Yilmaz, S. Somu, A. Busnaina, and H. Altug, “Monopole antenna arrays for optical trapping, spectroscopy, and sensing,” Appl. Phys. Lett. 98(11), 111110 (2011).
[CrossRef]

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat Commun. 2, 469 (2011).
[CrossRef] [PubMed]

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[CrossRef]

Y. Pang and R. Gordon, “Optical trapping of 12 nm dielectric spheres using double-nanoholes in a gold film,” Nano Lett. 11(9), 3763–3767 (2011).
[CrossRef] [PubMed]

P. V. Ruijgrok, N. R. Verhart, P. Zijlstra, A. L. Tchebotareva, and M. Orrit, “Brownian fluctuations and heating of an optically aligned gold nanorod,” Phys. Rev. Lett. 107(3), 037401 (2011).
[CrossRef] [PubMed]

R. T. Schermer, C. C. Olson, J. P. Coleman, and F. Bucholtz, “Laser-induced thermophoresis of individual particles in a viscous liquid,” Opt. Express 19(11), 10571–10586 (2011).
[CrossRef] [PubMed]

2010 (4)

J. Wu and X. Gan, “Three dimensional nanoparticle trapping enhanced by surface plasmon resonance,” Opt. Express 18(26), 27619–27626 (2010).
[CrossRef] [PubMed]

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern, “Plasmonic nanowire antennas: experiment, simulation, and theory,” Nano Lett. 10(9), 3596–3603 (2010).
[CrossRef] [PubMed]

W. Zhang, L. Huang, C. Santschi, and O. J. F. Martin, “Trapping and sensing 10 nm metal nanoparticles using plasmonic dipole antennas,” Nano Lett. 10(3), 1006–1011 (2010).
[CrossRef] [PubMed]

2009 (7)

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

M. L. Juan, R. Gordon, Y. Pang, F. Eftekhari, and R. Quidant, “Self-induced back-action optical trapping of dielectric nanoparticles,” Nat. Phys. 5(12), 915–919 (2009).
[CrossRef]

D. Lapotko, “Optical excitation and detection of vapor bubbles around plasmonic nanoparticles,” Opt. Express 17(4), 2538–2556 (2009).
[CrossRef] [PubMed]

X. Gao and X. Gan, “Modulation of evanescent focus by localized surface plasmons waveguide,” Opt. Express 17(25), 22726–22734 (2009).
[CrossRef] [PubMed]

H.-R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

G. Baffou, R. Quidant, and C. Girard, “Heat generation in plasmonic nanostructures: Influence of morphology,” Appl. Phys. Lett. 94(15), 153109 (2009).
[CrossRef]

S. Buzzi, M. Galli, M. Agio, and J. F. Loffler, “Silver high-aspect-ratio micro- and nanoimprinting for optical applications,” Appl. Phys. Lett. 94(22), 223115 (2009).
[CrossRef]

2008 (6)

M. Braibanti, D. Vigolo, and R. Piazza, “Does thermophoretic mobility depend on particle size?” Phys. Rev. Lett. 100(10), 108303 (2008).
[CrossRef] [PubMed]

R. Piazza and A. Parola, “Thermophoresis in colloidal suspensions,” J. Phys. Condens. Matter 20(15), 153102 (2008).
[CrossRef]

X. Miao, B. K. Wilson, S. H. Pun, and L. Y. Lin, “Optical manipulation of micron/submicron sized particles and biomolecules through plasmonics,” Opt. Express 16(18), 13517–13525 (2008).
[CrossRef] [PubMed]

J. R. Moffitt, Y. R. Chemla, S. B. Smith, and C. Bustamante, “Recent advances in optical tweezers,” Annu. Rev. Biochem. 77(1), 205–228 (2008).
[CrossRef] [PubMed]

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

X. Miao, B. K. Wilson, and L. Y. Lin, “Localized surface plasmon assisted microfluidic mixing,” Appl. Phys. Lett. 92(12), 124108 (2008).
[CrossRef]

2007 (1)

X. Miao and L. Y. Lin, “Trapping and manipulation of biological particles through a plasmonic platform,” IEEE J. Sel. Top. Quantum Electron. 13(6), 1655–1662 (2007).
[CrossRef]

2006 (1)

S. Duhr and D. Braun, “Why molecules move along a temperature gradient,” Proc. Natl. Acad. Sci. U.S.A. 103(52), 19678–19682 (2006).
[CrossRef] [PubMed]

2005 (1)

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

2002 (2)

H. Xu and M. Käll, “Surface-plasmon-enhanced optical forces in silver nanoaggregates,” Phys. Rev. Lett. 89(24), 246802 (2002).
[CrossRef] [PubMed]

C. L. G. Alzar, M. A. G. Martinez, and P. Nussenzveig, “Classical analog of electromagnetically induced transparency,” Am. J. Phys. 70(1), 37–41 (2002).
[CrossRef]

1972 (1)

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B 6(12), 4370–4379 (1972).
[CrossRef]

Agio, M.

S. Buzzi, M. Galli, M. Agio, and J. F. Loffler, “Silver high-aspect-ratio micro- and nanoimprinting for optical applications,” Appl. Phys. Lett. 94(22), 223115 (2009).
[CrossRef]

Altug, H.

A. E. Cetin, A. A. Yanik, C. Yilmaz, S. Somu, A. Busnaina, and H. Altug, “Monopole antenna arrays for optical trapping, spectroscopy, and sensing,” Appl. Phys. Lett. 98(11), 111110 (2011).
[CrossRef]

Alzar, C. L. G.

C. L. G. Alzar, M. A. G. Martinez, and P. Nussenzveig, “Classical analog of electromagnetically induced transparency,” Am. J. Phys. 70(1), 37–41 (2002).
[CrossRef]

Atkinson, R.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Aussenegg, F. R.

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

Baffou, G.

G. Baffou, R. Quidant, and C. Girard, “Heat generation in plasmonic nanostructures: Influence of morphology,” Appl. Phys. Lett. 94(15), 153109 (2009).
[CrossRef]

Behymer, E. M.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Bond, T. C.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Bora, M.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Borghs, G.

C. Chen, M. L. Juan, Y. Li, G. Maes, G. Borghs, P. Van Dorpe, and R. Quidant, “Enhanced optical trapping and arrangement of nano-objects in a plasmonic nanocavity,” Nano Lett. 12(1), 125–132 (2012).
[CrossRef] [PubMed]

Braibanti, M.

M. Braibanti, D. Vigolo, and R. Piazza, “Does thermophoretic mobility depend on particle size?” Phys. Rev. Lett. 100(10), 108303 (2008).
[CrossRef] [PubMed]

Braun, D.

S. Duhr and D. Braun, “Why molecules move along a temperature gradient,” Proc. Natl. Acad. Sci. U.S.A. 103(52), 19678–19682 (2006).
[CrossRef] [PubMed]

Britten, J. A.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Büchi, L.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Bucholtz, F.

Busnaina, A.

A. E. Cetin, A. A. Yanik, C. Yilmaz, S. Somu, A. Busnaina, and H. Altug, “Monopole antenna arrays for optical trapping, spectroscopy, and sensing,” Appl. Phys. Lett. 98(11), 111110 (2011).
[CrossRef]

Bustamante, C.

J. R. Moffitt, Y. R. Chemla, S. B. Smith, and C. Bustamante, “Recent advances in optical tweezers,” Annu. Rev. Biochem. 77(1), 205–228 (2008).
[CrossRef] [PubMed]

Buzzi, S.

S. Buzzi, M. Galli, M. Agio, and J. F. Loffler, “Silver high-aspect-ratio micro- and nanoimprinting for optical applications,” Appl. Phys. Lett. 94(22), 223115 (2009).
[CrossRef]

Cetin, A. E.

A. E. Cetin, A. A. Yanik, C. Yilmaz, S. Somu, A. Busnaina, and H. Altug, “Monopole antenna arrays for optical trapping, spectroscopy, and sensing,” Appl. Phys. Lett. 98(11), 111110 (2011).
[CrossRef]

Chan, J. W.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Chang, A. S. P.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Chemla, Y. R.

J. R. Moffitt, Y. R. Chemla, S. B. Smith, and C. Bustamante, “Recent advances in optical tweezers,” Annu. Rev. Biochem. 77(1), 205–228 (2008).
[CrossRef] [PubMed]

Chen, C.

C. Chen, M. L. Juan, Y. Li, G. Maes, G. Borghs, P. Van Dorpe, and R. Quidant, “Enhanced optical trapping and arrangement of nano-objects in a plasmonic nanocavity,” Nano Lett. 12(1), 125–132 (2012).
[CrossRef] [PubMed]

Chow, E. K. C.

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

Christy, R. W.

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B 6(12), 4370–4379 (1972).
[CrossRef]

Coleman, J. P.

Crozier, K. B.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat Commun. 2, 469 (2011).
[CrossRef] [PubMed]

David, C.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Dickinson, M. R.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

Ditlbacher, H.

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

Dorfmüller, J.

J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern, “Plasmonic nanowire antennas: experiment, simulation, and theory,” Nano Lett. 10(9), 3596–3603 (2010).
[CrossRef] [PubMed]

Duhr, S.

S. Duhr and D. Braun, “Why molecules move along a temperature gradient,” Proc. Natl. Acad. Sci. U.S.A. 103(52), 19678–19682 (2006).
[CrossRef] [PubMed]

Eftekhari, F.

M. L. Juan, R. Gordon, Y. Pang, F. Eftekhari, and R. Quidant, “Self-induced back-action optical trapping of dielectric nanoparticles,” Nat. Phys. 5(12), 915–919 (2009).
[CrossRef]

Ekinci, Y.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Etrich, C.

J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern, “Plasmonic nanowire antennas: experiment, simulation, and theory,” Nano Lett. 10(9), 3596–3603 (2010).
[CrossRef] [PubMed]

Evans, P.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Fang, N. X.

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

Fasenfest, B. J.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Feurer, T.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Fung, K. H.

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

Galli, M.

S. Buzzi, M. Galli, M. Agio, and J. F. Loffler, “Silver high-aspect-ratio micro- and nanoimprinting for optical applications,” Appl. Phys. Lett. 94(22), 223115 (2009).
[CrossRef]

Gan, X.

Gao, X.

Giannini, R.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Girard, C.

G. Baffou, R. Quidant, and C. Girard, “Heat generation in plasmonic nanostructures: Influence of morphology,” Appl. Phys. Lett. 94(15), 153109 (2009).
[CrossRef]

Gordon, R.

Y. Pang and R. Gordon, “Optical trapping of 12 nm dielectric spheres using double-nanoholes in a gold film,” Nano Lett. 11(9), 3763–3767 (2011).
[CrossRef] [PubMed]

M. L. Juan, R. Gordon, Y. Pang, F. Eftekhari, and R. Quidant, “Self-induced back-action optical trapping of dielectric nanoparticles,” Nat. Phys. 5(12), 915–919 (2009).
[CrossRef]

Gorelick, S.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Grigorenko, A. N.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

Hendren, W.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Hofer, F.

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

Hohenau, A.

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

Huang, L.

W. Zhang, L. Huang, C. Santschi, and O. J. F. Martin, “Trapping and sensing 10 nm metal nanoparticles using plasmonic dipole antennas,” Nano Lett. 10(3), 1006–1011 (2010).
[CrossRef] [PubMed]

Jiang, H.-R.

H.-R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

Johnson, P. B.

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B 6(12), 4370–4379 (1972).
[CrossRef]

Juan, M. L.

C. Chen, M. L. Juan, Y. Li, G. Maes, G. Borghs, P. Van Dorpe, and R. Quidant, “Enhanced optical trapping and arrangement of nano-objects in a plasmonic nanocavity,” Nano Lett. 12(1), 125–132 (2012).
[CrossRef] [PubMed]

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[CrossRef]

M. L. Juan, R. Gordon, Y. Pang, F. Eftekhari, and R. Quidant, “Self-induced back-action optical trapping of dielectric nanoparticles,” Nat. Phys. 5(12), 915–919 (2009).
[CrossRef]

Kabashin, A. V.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Käll, M.

H. Xu and M. Käll, “Surface-plasmon-enhanced optical forces in silver nanoaggregates,” Phys. Rev. Lett. 89(24), 246802 (2002).
[CrossRef] [PubMed]

Kern, K.

J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern, “Plasmonic nanowire antennas: experiment, simulation, and theory,” Nano Lett. 10(9), 3596–3603 (2010).
[CrossRef] [PubMed]

Khunsin, W.

J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern, “Plasmonic nanowire antennas: experiment, simulation, and theory,” Nano Lett. 10(9), 3596–3603 (2010).
[CrossRef] [PubMed]

Ko, K. D.

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

Kreibig, U.

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

Krenn, J. R.

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

Kumar, A.

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

Lapotko, D.

Larson, C. C.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Li, Y.

C. Chen, M. L. Juan, Y. Li, G. Maes, G. Borghs, P. Van Dorpe, and R. Quidant, “Enhanced optical trapping and arrangement of nano-objects in a plasmonic nanocavity,” Nano Lett. 12(1), 125–132 (2012).
[CrossRef] [PubMed]

Lin, L. Y.

X. Miao, B. K. Wilson, and L. Y. Lin, “Localized surface plasmon assisted microfluidic mixing,” Appl. Phys. Lett. 92(12), 124108 (2008).
[CrossRef]

X. Miao, B. K. Wilson, S. H. Pun, and L. Y. Lin, “Optical manipulation of micron/submicron sized particles and biomolecules through plasmonics,” Opt. Express 16(18), 13517–13525 (2008).
[CrossRef] [PubMed]

X. Miao and L. Y. Lin, “Trapping and manipulation of biological particles through a plasmonic platform,” IEEE J. Sel. Top. Quantum Electron. 13(6), 1655–1662 (2007).
[CrossRef]

Liu, G. L.

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

Loffler, J. F.

S. Buzzi, M. Galli, M. Agio, and J. F. Loffler, “Silver high-aspect-ratio micro- and nanoimprinting for optical applications,” Appl. Phys. Lett. 94(22), 223115 (2009).
[CrossRef]

Löffler, J. F.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Maes, G.

C. Chen, M. L. Juan, Y. Li, G. Maes, G. Borghs, P. Van Dorpe, and R. Quidant, “Enhanced optical trapping and arrangement of nano-objects in a plasmonic nanocavity,” Nano Lett. 12(1), 125–132 (2012).
[CrossRef] [PubMed]

Martin, O. J. F.

W. Zhang, L. Huang, C. Santschi, and O. J. F. Martin, “Trapping and sensing 10 nm metal nanoparticles using plasmonic dipole antennas,” Nano Lett. 10(3), 1006–1011 (2010).
[CrossRef] [PubMed]

Martinez, M. A. G.

C. L. G. Alzar, M. A. G. Martinez, and P. Nussenzveig, “Classical analog of electromagnetically induced transparency,” Am. J. Phys. 70(1), 37–41 (2002).
[CrossRef]

Merbold, H.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Miao, X.

X. Miao, B. K. Wilson, S. H. Pun, and L. Y. Lin, “Optical manipulation of micron/submicron sized particles and biomolecules through plasmonics,” Opt. Express 16(18), 13517–13525 (2008).
[CrossRef] [PubMed]

X. Miao, B. K. Wilson, and L. Y. Lin, “Localized surface plasmon assisted microfluidic mixing,” Appl. Phys. Lett. 92(12), 124108 (2008).
[CrossRef]

X. Miao and L. Y. Lin, “Trapping and manipulation of biological particles through a plasmonic platform,” IEEE J. Sel. Top. Quantum Electron. 13(6), 1655–1662 (2007).
[CrossRef]

Miles, R. R.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Moffitt, J. R.

J. R. Moffitt, Y. R. Chemla, S. B. Smith, and C. Bustamante, “Recent advances in optical tweezers,” Annu. Rev. Biochem. 77(1), 205–228 (2008).
[CrossRef] [PubMed]

Nguyen, H. T.

M. Bora, B. J. Fasenfest, E. M. Behymer, A. S. P. Chang, H. T. Nguyen, J. A. Britten, C. C. Larson, J. W. Chan, R. R. Miles, and T. C. Bond, “Plasmon resonant cavities in vertical nanowire arrays,” Nano Lett. 10(8), 2832–2837 (2010).
[CrossRef] [PubMed]

Nussenzveig, P.

C. L. G. Alzar, M. A. G. Martinez, and P. Nussenzveig, “Classical analog of electromagnetically induced transparency,” Am. J. Phys. 70(1), 37–41 (2002).
[CrossRef]

Olson, C. C.

Orrit, M.

P. V. Ruijgrok, N. R. Verhart, P. Zijlstra, A. L. Tchebotareva, and M. Orrit, “Brownian fluctuations and heating of an optically aligned gold nanorod,” Phys. Rev. Lett. 107(3), 037401 (2011).
[CrossRef] [PubMed]

Päivänranta, B.

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Pang, Y.

Y. Pang and R. Gordon, “Optical trapping of 12 nm dielectric spheres using double-nanoholes in a gold film,” Nano Lett. 11(9), 3763–3767 (2011).
[CrossRef] [PubMed]

M. L. Juan, R. Gordon, Y. Pang, F. Eftekhari, and R. Quidant, “Self-induced back-action optical trapping of dielectric nanoparticles,” Nat. Phys. 5(12), 915–919 (2009).
[CrossRef]

Parola, A.

R. Piazza and A. Parola, “Thermophoresis in colloidal suspensions,” J. Phys. Condens. Matter 20(15), 153102 (2008).
[CrossRef]

Pastkovsky, S.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Piazza, R.

R. Piazza and A. Parola, “Thermophoresis in colloidal suspensions,” J. Phys. Condens. Matter 20(15), 153102 (2008).
[CrossRef]

M. Braibanti, D. Vigolo, and R. Piazza, “Does thermophoretic mobility depend on particle size?” Phys. Rev. Lett. 100(10), 108303 (2008).
[CrossRef] [PubMed]

Podolskiy, V. A.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Pollard, R.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Pun, S. H.

Quidant, R.

C. Chen, M. L. Juan, Y. Li, G. Maes, G. Borghs, P. Van Dorpe, and R. Quidant, “Enhanced optical trapping and arrangement of nano-objects in a plasmonic nanocavity,” Nano Lett. 12(1), 125–132 (2012).
[CrossRef] [PubMed]

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[CrossRef]

M. L. Juan, R. Gordon, Y. Pang, F. Eftekhari, and R. Quidant, “Self-induced back-action optical trapping of dielectric nanoparticles,” Nat. Phys. 5(12), 915–919 (2009).
[CrossRef]

G. Baffou, R. Quidant, and C. Girard, “Heat generation in plasmonic nanostructures: Influence of morphology,” Appl. Phys. Lett. 94(15), 153109 (2009).
[CrossRef]

Righini, M.

M. L. Juan, M. Righini, and R. Quidant, “Plasmon nano-optical tweezers,” Nat. Photonics 5(6), 349–356 (2011).
[CrossRef]

Roberts, N. W.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

Rockstuhl, C.

J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern, “Plasmonic nanowire antennas: experiment, simulation, and theory,” Nano Lett. 10(9), 3596–3603 (2010).
[CrossRef] [PubMed]

Rogers, M.

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

Roxworthy, B. J.

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

Ruijgrok, P. V.

P. V. Ruijgrok, N. R. Verhart, P. Zijlstra, A. L. Tchebotareva, and M. Orrit, “Brownian fluctuations and heating of an optically aligned gold nanorod,” Phys. Rev. Lett. 107(3), 037401 (2011).
[CrossRef] [PubMed]

Sano, M.

H.-R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

Santschi, C.

W. Zhang, L. Huang, C. Santschi, and O. J. F. Martin, “Trapping and sensing 10 nm metal nanoparticles using plasmonic dipole antennas,” Nano Lett. 10(3), 1006–1011 (2010).
[CrossRef] [PubMed]

Schermer, R. T.

Schonbrun, E.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat Commun. 2, 469 (2011).
[CrossRef] [PubMed]

Smith, S. B.

J. R. Moffitt, Y. R. Chemla, S. B. Smith, and C. Bustamante, “Recent advances in optical tweezers,” Annu. Rev. Biochem. 77(1), 205–228 (2008).
[CrossRef] [PubMed]

Somu, S.

A. E. Cetin, A. A. Yanik, C. Yilmaz, S. Somu, A. Busnaina, and H. Altug, “Monopole antenna arrays for optical trapping, spectroscopy, and sensing,” Appl. Phys. Lett. 98(11), 111110 (2011).
[CrossRef]

Steinvurzel, P.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat Commun. 2, 469 (2011).
[CrossRef] [PubMed]

Tchebotareva, A. L.

P. V. Ruijgrok, N. R. Verhart, P. Zijlstra, A. L. Tchebotareva, and M. Orrit, “Brownian fluctuations and heating of an optically aligned gold nanorod,” Phys. Rev. Lett. 107(3), 037401 (2011).
[CrossRef] [PubMed]

Toussaint, K. C.

B. J. Roxworthy, K. D. Ko, A. Kumar, K. H. Fung, E. K. C. Chow, G. L. Liu, N. X. Fang, and K. C. Toussaint., “Application of plasmonic bowtie nanoantenna arrays for optical trapping, stacking, and sorting,” Nano Lett. 12(2), 796–801 (2012).
[CrossRef] [PubMed]

Van Dorpe, P.

C. Chen, M. L. Juan, Y. Li, G. Maes, G. Borghs, P. Van Dorpe, and R. Quidant, “Enhanced optical trapping and arrangement of nano-objects in a plasmonic nanocavity,” Nano Lett. 12(1), 125–132 (2012).
[CrossRef] [PubMed]

Verhart, N. R.

P. V. Ruijgrok, N. R. Verhart, P. Zijlstra, A. L. Tchebotareva, and M. Orrit, “Brownian fluctuations and heating of an optically aligned gold nanorod,” Phys. Rev. Lett. 107(3), 037401 (2011).
[CrossRef] [PubMed]

Vigolo, D.

M. Braibanti, D. Vigolo, and R. Piazza, “Does thermophoretic mobility depend on particle size?” Phys. Rev. Lett. 100(10), 108303 (2008).
[CrossRef] [PubMed]

Vogelgesang, R.

J. Dorfmüller, R. Vogelgesang, W. Khunsin, C. Rockstuhl, C. Etrich, and K. Kern, “Plasmonic nanowire antennas: experiment, simulation, and theory,” Nano Lett. 10(9), 3596–3603 (2010).
[CrossRef] [PubMed]

Wada, H.

H.-R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

Wagner, D.

H. Ditlbacher, A. Hohenau, D. Wagner, U. Kreibig, M. Rogers, F. Hofer, F. R. Aussenegg, and J. R. Krenn, “Silver nanowires as surface plasmon resonators,” Phys. Rev. Lett. 95(25), 257403 (2005).
[CrossRef] [PubMed]

Wang, K.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Trapping and rotating nanoparticles using a plasmonic nano-tweezer with an integrated heat sink,” Nat Commun. 2, 469 (2011).
[CrossRef] [PubMed]

Wilson, B. K.

Wu, J.

Wurtz, G. A.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Xu, H.

H. Xu and M. Käll, “Surface-plasmon-enhanced optical forces in silver nanoaggregates,” Phys. Rev. Lett. 89(24), 246802 (2002).
[CrossRef] [PubMed]

Yanik, A. A.

A. E. Cetin, A. A. Yanik, C. Yilmaz, S. Somu, A. Busnaina, and H. Altug, “Monopole antenna arrays for optical trapping, spectroscopy, and sensing,” Appl. Phys. Lett. 98(11), 111110 (2011).
[CrossRef]

Yilmaz, C.

A. E. Cetin, A. A. Yanik, C. Yilmaz, S. Somu, A. Busnaina, and H. Altug, “Monopole antenna arrays for optical trapping, spectroscopy, and sensing,” Appl. Phys. Lett. 98(11), 111110 (2011).
[CrossRef]

Yoshinaga, N.

H.-R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

Zayats, A. V.

A. V. Kabashin, P. Evans, S. Pastkovsky, W. Hendren, G. A. Wurtz, R. Atkinson, R. Pollard, V. A. Podolskiy, and A. V. Zayats, “Plasmonic nanorod metamaterials for biosensing,” Nat. Mater. 8(11), 867–871 (2009).
[CrossRef] [PubMed]

Zhang, W.

W. Zhang, L. Huang, C. Santschi, and O. J. F. Martin, “Trapping and sensing 10 nm metal nanoparticles using plasmonic dipole antennas,” Nano Lett. 10(3), 1006–1011 (2010).
[CrossRef] [PubMed]

Zhang, Y.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

Zijlstra, P.

P. V. Ruijgrok, N. R. Verhart, P. Zijlstra, A. L. Tchebotareva, and M. Orrit, “Brownian fluctuations and heating of an optically aligned gold nanorod,” Phys. Rev. Lett. 107(3), 037401 (2011).
[CrossRef] [PubMed]

ACS Nano (1)

B. Päivänranta, H. Merbold, R. Giannini, L. Büchi, S. Gorelick, C. David, J. F. Löffler, T. Feurer, and Y. Ekinci, “High aspect ratio plasmonic nanostructures for sensing applications,” ACS Nano 5(8), 6374–6382 (2011).
[CrossRef] [PubMed]

Am. J. Phys. (1)

C. L. G. Alzar, M. A. G. Martinez, and P. Nussenzveig, “Classical analog of electromagnetically induced transparency,” Am. J. Phys. 70(1), 37–41 (2002).
[CrossRef]

Annu. Rev. Biochem. (1)

J. R. Moffitt, Y. R. Chemla, S. B. Smith, and C. Bustamante, “Recent advances in optical tweezers,” Annu. Rev. Biochem. 77(1), 205–228 (2008).
[CrossRef] [PubMed]

Appl. Phys. Lett. (4)

A. E. Cetin, A. A. Yanik, C. Yilmaz, S. Somu, A. Busnaina, and H. Altug, “Monopole antenna arrays for optical trapping, spectroscopy, and sensing,” Appl. Phys. Lett. 98(11), 111110 (2011).
[CrossRef]

X. Miao, B. K. Wilson, and L. Y. Lin, “Localized surface plasmon assisted microfluidic mixing,” Appl. Phys. Lett. 92(12), 124108 (2008).
[CrossRef]

S. Buzzi, M. Galli, M. Agio, and J. F. Loffler, “Silver high-aspect-ratio micro- and nanoimprinting for optical applications,” Appl. Phys. Lett. 94(22), 223115 (2009).
[CrossRef]

G. Baffou, R. Quidant, and C. Girard, “Heat generation in plasmonic nanostructures: Influence of morphology,” Appl. Phys. Lett. 94(15), 153109 (2009).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron. (1)

X. Miao and L. Y. Lin, “Trapping and manipulation of biological particles through a plasmonic platform,” IEEE J. Sel. Top. Quantum Electron. 13(6), 1655–1662 (2007).
[CrossRef]

J. Phys. Condens. Matter (1)

R. Piazza and A. Parola, “Thermophoresis in colloidal suspensions,” J. Phys. Condens. Matter 20(15), 153102 (2008).
[CrossRef]

Nano Lett. (6)

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Other (1)

“FDTD Solutions,” Lumerical Solutions Inc., www.lumerical.com .

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Figures (17)

Fig. 1
Fig. 1

Schematic diagram of the nanostructure of two silver nanorods with height h, diameter d and separation s. Incident field is x-polarized and propagates in the z direction from the substrate (refractive index 1.78) into water (refractive index nm = 1.33). The origin of the coordinate system is at the center of the gap on the interface.

Fig. 2
Fig. 2

(a) Absorption spectrum of the nanostructure with separation s of 100 nm, diameter d of 70 nm and height h of 820 nm. (b) An oscillator model for the optical response of the nanostructure.

Fig. 3
Fig. 3

Intensity distributions of the nanostructure with diameter d of 70 nm, height h of 820 nm, separation s of 100 nm at excitation wavelengths λ of (a) λ: 430 nm, (b) λ: 455 nm and (c) λ: 532 nm, in the zx cross section. The white line indicates the interface. Colorbar is in unit of V2 m−2.

Fig. 4
Fig. 4

Comparison of intensity distributions of the nanostructure with diameter d of 70 nm, height h of 820 nm, separation s of 100 nm at different wavelengths at the center of the gap along the z direction.

Fig. 5
Fig. 5

Comparison of the EM force in the nanostructure with diameter d of 70 nm, height h of 820 nm, separation s of 100 nm at different wavelengths, at the center of the gap. (a) The maximal Fy, (b) Fz. The intensity of the incident light is taken as 0.1 mW·μm−2.

Fig. 6
Fig. 6

Comparison of the thermal force in the nanostructure with diameter d of 70 nm, height h of 820 nm, separation s of 100 nm at different wavelengths, at the center of the gap. (a) Fy, (b) Fz. The intensity of the incident light is taken as 0.1 mW·μm−2. The Soret coefficient ST used for calculation is 2 x 10−4 (K −1).

Fig. 7
Fig. 7

Absorption spectra of the nanostructure with different separations s, for fixed diameter d of 70 nm and height h of 820 nm.

Fig. 8
Fig. 8

Intensity distributions in the central cross section (zx plane) of the nanostructure with different separations s at the corresponding peak absorption wavelengths λ. (a) s = 40 nm at λ = 470 nm, (b) s = 70 nm at λ = 461 nm, and (c) s = 100 nm at λ = 455 nm. Colorbar is in unit of V2 m−2.

Fig. 9
Fig. 9

Comparison of intensity distributions at the center of the gap along the z direction for the nanostructures with different separations s at the corresponding peak absorption wavelengths λ of 470 nm, 461 nm and 455 nm.

Fig. 10
Fig. 10

Comparison of the EM force in the nanostructures with different separations s at the corresponding peak absorption wavelengths λ of 470 nm, 461 nm and 455 nm, respectively. (a) The maximal Fy, (b) Fz. The intensity of the incident light is taken as 0.1 mW·μm−2.

Fig. 11
Fig. 11

Comparison of the thermal force in the nanostructure with different separations s at the corresponding peak absorption wavelengths λ of 470 nm, 461 nm and 455 nm, respectively: (a) Fy, (b) Fz. The intensity of the incident light is taken as 0.1 mW·μm−2. The Soret coefficient ST used for calculation is 2 x 10−4 (K −1).

Fig. 12
Fig. 12

Absorption spectra of the nanostructure with different diameters d at fixed separation s of 70 nm and height h of 820 nm.

Fig. 13
Fig. 13

Intensity distributions of the nanostructure with different diameters d at the corresponding peak absorption wavelengths λ. (a) d = 40 nm at λ = 427 nm, (b) d = 70 nm at λ = 461 nm, and (c) d = 100 nm at λ = 480 nm, in the zx plane. Colorbar is in unit of V2 m−2.

Fig. 14
Fig. 14

Comparison of intensity distributions of the nanostructure at the center of the gap along the z direction with different diameters d at the corresponding peak absorption wavelengths λ of 427 nm, 461 nm and 480 nm.

Fig. 15
Fig. 15

Absorption spectra of the nanostructure with different heights h of 700 nm, 760 nm and 820 nm, at fixed separation s of 70 nm and diameter d of 70 nm.

Fig. 16
Fig. 16

Intensity distributions of the nanostructure in the zx plane with different heights h at the corresponding peak absorption wavelengths λ. (a) h = 700 nm at λ = 437 nm, (b) h = 760 nm at λ = 450 nm, and (c) h = 820 nm at λ = 461 nm. Colorbar is in unit of V2 m−2.

Fig. 17
Fig. 17

Comparisons of (a) the intensity distributions, and (b) the EM force, in the nanostructure with different heights h at the center of the gap along the z direction. The corresponding peak absorption wavelengths λ for nanorods of diameter 700 nm, 760 nm and 820 nm are 437 nm, 450 nm and 461 nm, respectively. The intensity of the incident light is taken as 0.1 mW·μm−2 for force calculation.

Equations (2)

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x 1 + γ 1 x 1 + ω 1 2 x 1 Ω 2 x 2 Ω c 2 x 3 = F m exp(i ω S t), x 2 + γ 2 x 2 + ω 2 2 x 2 Ω 2 x 1 Ω c2 2 x 4 =0, x 3 + γ 3 x 3 + ω 3 2 x 3 Ω 2 x 4 Ω c 2 x 1 = F m exp(i ω S t), x 4 + γ 4 x 4 + ω 4 2 x 4 Ω 2 x 3 Ω c2 2 x 2 =0.
4π λ sp h=2mπ+φ.

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