Abstract

We describe a technique for experimentally determining the spatial-frequency modulation transfer function for near-field super-resolution imaging systems and present such a modulation transfer function for a 20|40|20 nm poly(vinyl alcohol)~(PVA)|Silver|PVA superlens exposed to 365 nm wavelength (i-line) radiation through a 50-nm thick tungsten mask. An extensive spectral characterization is achieved from only two exposures, with transmission coefficients determined for spatial frequencies as high as 13 µm−1, corresponding to λ / 4.75. The resulting transfer function is in good agreement with analytical models that incorporate the effects of mask-superlens interactions.

© 2012 OSA

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  1. J. B. Pendry, “Negative refraction makes a perfect lens,” Phys. Rev. Lett.85(18), 3966–3969 (2000).
    [CrossRef] [PubMed]
  2. C. P. Moore, M. D. Arnold, P. J. Bones, and R. J. Blaikie, “Image fidelity for single-layer and multi-layer silver superlenses,” J. Opt. Soc. Am. A25(4), 911–918 (2008).
    [CrossRef] [PubMed]
  3. D. O. S. Melville and R. J. Blaikie, “Analysis and optimization of multilayer Silver superlenses for near-field optical lithography,” Physica B394(2), 197–202 (2007).
    [CrossRef]
  4. D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
    [CrossRef]
  5. K. Lee, Y. Jung, and K. Kim, “Near-field phase correction for superresolution enhancement,” Phys. Rev. B80(3), 033109 (2009).
    [CrossRef]
  6. R. Kotyński, “Fourier optics approach to imaging with sub-wavelength resolution through metal-dielectric multilayers,” Opto-Electron. Rev.18(4), 366–375 (2010).
    [CrossRef]
  7. C. P. Moore, R. J. Blaikie, and M. D. Arnold, “An improved transfer-matrix model for optical superlenses,” Opt. Express17(16), 14260–14269 (2009).
    [CrossRef] [PubMed]
  8. D. O. S. Melville and R. J. Blaikie, “Super-resolution imaging through a planar silver layer,” Opt. Express13(6), 2127–2134 (2005).
    [CrossRef] [PubMed]
  9. N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science308(5721), 534–537 (2005).
    [CrossRef] [PubMed]
  10. P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
    [CrossRef]
  11. J. Aizenberg, J. A. Rogers, K. E. Paul, and G. M. Whitesides, “Imaging the irradiance distribution in the optical near field,” Appl. Phys. Lett.71(26), 3773–3775 (1997).
    [CrossRef]
  12. M. M. Alkaisi, R. J. Blaikie, S. J. McNab, R. Cheung, and D. R. S. Cumming, “Sub-diffraction-limited patterning using evanescent near-field optical lithography,” Appl. Phys. Lett.75(22), 3560–3562 (1999).
    [CrossRef]
  13. T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
    [CrossRef]
  14. C. P. Moore, R. J. Blaikie, and M. D. Arnold, “Improved analytical models for single- and multi-layer Silver superlenses,” MRS Proc.1182, 1182–EE11–02 (2009).
    [CrossRef]
  15. C. P. Moore and R. J. Blaikie, “Flexible poly(dimethyl siloxane) support layers for the evanescent characterization of near-field lithography systems,” J. Vac. Sci. Technol. B29(6), 06FH02 (2011).
    [CrossRef]
  16. D. O. S. Melville and R. J. Blaikie, “Experimental comparison of resolution and pattern fidelity in single- and double-layer planar lens lithography,” J. Opt. Soc. Am. B23(3), 461–467 (2006).
    [CrossRef]
  17. C. P. Moore, Optical superlenses: quality and fidelity in Silver-dielectric near-field imaging systems, PhD. Thesis (University of Canterbury, New Zealand, 2012), Chap. 7.
  18. P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B6(12), 4370–4379 (1972).
    [CrossRef]
  19. J. C. Seferis, “Refractive indices of polymers,” in Polymer Handbook, J. Brandrup and E. H. Immergut, eds. (John Wiley & Sons, New York, 1989).
  20. D. R. Lide, The CRC Handbook of Chemistry and Physics (CRC Press, 2008).

2011

C. P. Moore and R. J. Blaikie, “Flexible poly(dimethyl siloxane) support layers for the evanescent characterization of near-field lithography systems,” J. Vac. Sci. Technol. B29(6), 06FH02 (2011).
[CrossRef]

2010

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

R. Kotyński, “Fourier optics approach to imaging with sub-wavelength resolution through metal-dielectric multilayers,” Opto-Electron. Rev.18(4), 366–375 (2010).
[CrossRef]

2009

K. Lee, Y. Jung, and K. Kim, “Near-field phase correction for superresolution enhancement,” Phys. Rev. B80(3), 033109 (2009).
[CrossRef]

C. P. Moore, R. J. Blaikie, and M. D. Arnold, “An improved transfer-matrix model for optical superlenses,” Opt. Express17(16), 14260–14269 (2009).
[CrossRef] [PubMed]

C. P. Moore, R. J. Blaikie, and M. D. Arnold, “Improved analytical models for single- and multi-layer Silver superlenses,” MRS Proc.1182, 1182–EE11–02 (2009).
[CrossRef]

2008

2007

D. O. S. Melville and R. J. Blaikie, “Analysis and optimization of multilayer Silver superlenses for near-field optical lithography,” Physica B394(2), 197–202 (2007).
[CrossRef]

2006

T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
[CrossRef]

D. O. S. Melville and R. J. Blaikie, “Experimental comparison of resolution and pattern fidelity in single- and double-layer planar lens lithography,” J. Opt. Soc. Am. B23(3), 461–467 (2006).
[CrossRef]

2005

D. O. S. Melville and R. J. Blaikie, “Super-resolution imaging through a planar silver layer,” Opt. Express13(6), 2127–2134 (2005).
[CrossRef] [PubMed]

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science308(5721), 534–537 (2005).
[CrossRef] [PubMed]

2003

D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
[CrossRef]

2000

J. B. Pendry, “Negative refraction makes a perfect lens,” Phys. Rev. Lett.85(18), 3966–3969 (2000).
[CrossRef] [PubMed]

1999

M. M. Alkaisi, R. J. Blaikie, S. J. McNab, R. Cheung, and D. R. S. Cumming, “Sub-diffraction-limited patterning using evanescent near-field optical lithography,” Appl. Phys. Lett.75(22), 3560–3562 (1999).
[CrossRef]

1997

J. Aizenberg, J. A. Rogers, K. E. Paul, and G. M. Whitesides, “Imaging the irradiance distribution in the optical near field,” Appl. Phys. Lett.71(26), 3773–3775 (1997).
[CrossRef]

1972

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B6(12), 4370–4379 (1972).
[CrossRef]

Aizenberg, J.

J. Aizenberg, J. A. Rogers, K. E. Paul, and G. M. Whitesides, “Imaging the irradiance distribution in the optical near field,” Appl. Phys. Lett.71(26), 3773–3775 (1997).
[CrossRef]

Alkaisi, M. M.

M. M. Alkaisi, R. J. Blaikie, S. J. McNab, R. Cheung, and D. R. S. Cumming, “Sub-diffraction-limited patterning using evanescent near-field optical lithography,” Appl. Phys. Lett.75(22), 3560–3562 (1999).
[CrossRef]

Arnold, M. D.

Blaikie, R. J.

C. P. Moore and R. J. Blaikie, “Flexible poly(dimethyl siloxane) support layers for the evanescent characterization of near-field lithography systems,” J. Vac. Sci. Technol. B29(6), 06FH02 (2011).
[CrossRef]

C. P. Moore, R. J. Blaikie, and M. D. Arnold, “An improved transfer-matrix model for optical superlenses,” Opt. Express17(16), 14260–14269 (2009).
[CrossRef] [PubMed]

C. P. Moore, R. J. Blaikie, and M. D. Arnold, “Improved analytical models for single- and multi-layer Silver superlenses,” MRS Proc.1182, 1182–EE11–02 (2009).
[CrossRef]

C. P. Moore, M. D. Arnold, P. J. Bones, and R. J. Blaikie, “Image fidelity for single-layer and multi-layer silver superlenses,” J. Opt. Soc. Am. A25(4), 911–918 (2008).
[CrossRef] [PubMed]

D. O. S. Melville and R. J. Blaikie, “Analysis and optimization of multilayer Silver superlenses for near-field optical lithography,” Physica B394(2), 197–202 (2007).
[CrossRef]

D. O. S. Melville and R. J. Blaikie, “Experimental comparison of resolution and pattern fidelity in single- and double-layer planar lens lithography,” J. Opt. Soc. Am. B23(3), 461–467 (2006).
[CrossRef]

D. O. S. Melville and R. J. Blaikie, “Super-resolution imaging through a planar silver layer,” Opt. Express13(6), 2127–2134 (2005).
[CrossRef] [PubMed]

M. M. Alkaisi, R. J. Blaikie, S. J. McNab, R. Cheung, and D. R. S. Cumming, “Sub-diffraction-limited patterning using evanescent near-field optical lithography,” Appl. Phys. Lett.75(22), 3560–3562 (1999).
[CrossRef]

Bones, P. J.

Chaturvedi, P.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

Cheung, R.

M. M. Alkaisi, R. J. Blaikie, S. J. McNab, R. Cheung, and D. R. S. Cumming, “Sub-diffraction-limited patterning using evanescent near-field optical lithography,” Appl. Phys. Lett.75(22), 3560–3562 (1999).
[CrossRef]

Christy, R. W.

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B6(12), 4370–4379 (1972).
[CrossRef]

Cumming, D. R. S.

M. M. Alkaisi, R. J. Blaikie, S. J. McNab, R. Cheung, and D. R. S. Cumming, “Sub-diffraction-limited patterning using evanescent near-field optical lithography,” Appl. Phys. Lett.75(22), 3560–3562 (1999).
[CrossRef]

Fang, N.

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science308(5721), 534–537 (2005).
[CrossRef] [PubMed]

Fang, N. X.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

Inao, Y.

T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
[CrossRef]

Islam, M. S.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

Ito, T.

T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
[CrossRef]

Johnson, P. B.

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B6(12), 4370–4379 (1972).
[CrossRef]

Jung, Y.

K. Lee, Y. Jung, and K. Kim, “Near-field phase correction for superresolution enhancement,” Phys. Rev. B80(3), 033109 (2009).
[CrossRef]

Kim, K.

K. Lee, Y. Jung, and K. Kim, “Near-field phase correction for superresolution enhancement,” Phys. Rev. B80(3), 033109 (2009).
[CrossRef]

Kotynski, R.

R. Kotyński, “Fourier optics approach to imaging with sub-wavelength resolution through metal-dielectric multilayers,” Opto-Electron. Rev.18(4), 366–375 (2010).
[CrossRef]

Kuroda, R.

T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
[CrossRef]

Lee, H.

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science308(5721), 534–537 (2005).
[CrossRef] [PubMed]

Lee, K.

K. Lee, Y. Jung, and K. Kim, “Near-field phase correction for superresolution enhancement,” Phys. Rev. B80(3), 033109 (2009).
[CrossRef]

Logeeswaran, V. J.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

McNab, S. J.

M. M. Alkaisi, R. J. Blaikie, S. J. McNab, R. Cheung, and D. R. S. Cumming, “Sub-diffraction-limited patterning using evanescent near-field optical lithography,” Appl. Phys. Lett.75(22), 3560–3562 (1999).
[CrossRef]

Melville, D. O. S.

Mitzutani, N.

T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
[CrossRef]

Moore, C. P.

C. P. Moore and R. J. Blaikie, “Flexible poly(dimethyl siloxane) support layers for the evanescent characterization of near-field lithography systems,” J. Vac. Sci. Technol. B29(6), 06FH02 (2011).
[CrossRef]

C. P. Moore, R. J. Blaikie, and M. D. Arnold, “Improved analytical models for single- and multi-layer Silver superlenses,” MRS Proc.1182, 1182–EE11–02 (2009).
[CrossRef]

C. P. Moore, R. J. Blaikie, and M. D. Arnold, “An improved transfer-matrix model for optical superlenses,” Opt. Express17(16), 14260–14269 (2009).
[CrossRef] [PubMed]

C. P. Moore, M. D. Arnold, P. J. Bones, and R. J. Blaikie, “Image fidelity for single-layer and multi-layer silver superlenses,” J. Opt. Soc. Am. A25(4), 911–918 (2008).
[CrossRef] [PubMed]

Paul, K. E.

J. Aizenberg, J. A. Rogers, K. E. Paul, and G. M. Whitesides, “Imaging the irradiance distribution in the optical near field,” Appl. Phys. Lett.71(26), 3773–3775 (1997).
[CrossRef]

Pendry, J. B.

D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
[CrossRef]

J. B. Pendry, “Negative refraction makes a perfect lens,” Phys. Rev. Lett.85(18), 3966–3969 (2000).
[CrossRef] [PubMed]

Ramakrishna, S. A.

D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
[CrossRef]

Rogers, J. A.

J. Aizenberg, J. A. Rogers, K. E. Paul, and G. M. Whitesides, “Imaging the irradiance distribution in the optical near field,” Appl. Phys. Lett.71(26), 3773–3775 (1997).
[CrossRef]

Rosenbluth, M.

D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
[CrossRef]

Schultz, S.

D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
[CrossRef]

Schurig, D.

D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
[CrossRef]

Smith, D. R.

D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
[CrossRef]

Sun, C.

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science308(5721), 534–537 (2005).
[CrossRef] [PubMed]

Wang, S. Y.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

Whitesides, G. M.

J. Aizenberg, J. A. Rogers, K. E. Paul, and G. M. Whitesides, “Imaging the irradiance distribution in the optical near field,” Appl. Phys. Lett.71(26), 3773–3775 (1997).
[CrossRef]

Williams, R. S.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

Wu, W.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

Yamada, T.

T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
[CrossRef]

Yamaguchi, T.

T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
[CrossRef]

Yu, Z.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

Zhang, X.

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science308(5721), 534–537 (2005).
[CrossRef] [PubMed]

Appl. Phys. Lett.

P. Chaturvedi, W. Wu, V. J. Logeeswaran, Z. Yu, M. S. Islam, S. Y. Wang, R. S. Williams, and N. X. Fang, “A smooth optical superlens,” Appl. Phys. Lett.96(4), 043102 (2010).
[CrossRef]

J. Aizenberg, J. A. Rogers, K. E. Paul, and G. M. Whitesides, “Imaging the irradiance distribution in the optical near field,” Appl. Phys. Lett.71(26), 3773–3775 (1997).
[CrossRef]

M. M. Alkaisi, R. J. Blaikie, S. J. McNab, R. Cheung, and D. R. S. Cumming, “Sub-diffraction-limited patterning using evanescent near-field optical lithography,” Appl. Phys. Lett.75(22), 3560–3562 (1999).
[CrossRef]

T. Ito, T. Yamada, Y. Inao, T. Yamaguchi, N. Mitzutani, and R. Kuroda, “Fabrication of half-pitch 32 nm resist patterns using near-field lithography with a-Si mask,” Appl. Phys. Lett.89(3), 033113 (2006).
[CrossRef]

D. R. Smith, D. Schurig, M. Rosenbluth, S. Schultz, S. A. Ramakrishna, and J. B. Pendry, “Limitations on subdiffraction imaging with a negative refractive index slab,” Appl. Phys. Lett.82(10), 1506–1508 (2003).
[CrossRef]

J. Opt. Soc. Am. A

J. Opt. Soc. Am. B

J. Vac. Sci. Technol. B

C. P. Moore and R. J. Blaikie, “Flexible poly(dimethyl siloxane) support layers for the evanescent characterization of near-field lithography systems,” J. Vac. Sci. Technol. B29(6), 06FH02 (2011).
[CrossRef]

MRS Proc.

C. P. Moore, R. J. Blaikie, and M. D. Arnold, “Improved analytical models for single- and multi-layer Silver superlenses,” MRS Proc.1182, 1182–EE11–02 (2009).
[CrossRef]

Opt. Express

Opto-Electron. Rev.

R. Kotyński, “Fourier optics approach to imaging with sub-wavelength resolution through metal-dielectric multilayers,” Opto-Electron. Rev.18(4), 366–375 (2010).
[CrossRef]

Phys. Rev. B

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B6(12), 4370–4379 (1972).
[CrossRef]

K. Lee, Y. Jung, and K. Kim, “Near-field phase correction for superresolution enhancement,” Phys. Rev. B80(3), 033109 (2009).
[CrossRef]

Phys. Rev. Lett.

J. B. Pendry, “Negative refraction makes a perfect lens,” Phys. Rev. Lett.85(18), 3966–3969 (2000).
[CrossRef] [PubMed]

Physica B

D. O. S. Melville and R. J. Blaikie, “Analysis and optimization of multilayer Silver superlenses for near-field optical lithography,” Physica B394(2), 197–202 (2007).
[CrossRef]

Science

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science308(5721), 534–537 (2005).
[CrossRef] [PubMed]

Other

J. C. Seferis, “Refractive indices of polymers,” in Polymer Handbook, J. Brandrup and E. H. Immergut, eds. (John Wiley & Sons, New York, 1989).

D. R. Lide, The CRC Handbook of Chemistry and Physics (CRC Press, 2008).

C. P. Moore, Optical superlenses: quality and fidelity in Silver-dielectric near-field imaging systems, PhD. Thesis (University of Canterbury, New Zealand, 2012), Chap. 7.

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