volume | PIER Journals

Abstract

Multilayered structures consisting of alternating negative-permittivity and dielectric layers are explored to obtain high-resolution imaging of subwavelength objects. The peaks with the smallest |k_y| (k_y is the transverse wave vector) on the transmission curves, which come from the guided modes of the multilayered structures, can not be completely damped by material loss. This makes the amplitudes of the evanescent waves around these peaks inappropriate after transmitted through the imaging structures, and the imaging quality is not good. To solve such a problem, the permittivity of the dielectric layers is appropriately chosen to make these sharp peaks merge with their neighboring peaks, whose corresponding guiding modes in the multilayered structure are cutoff. Wide flat upheavals are then generated on the transmission curves so that evanescent waves in a large range are transmitted through the structures with appropriate amplitudes. In addition, it is found that the sharp peaks with the smallest |k_y| can be eliminated by adding appropriate coating layers and wide flat upheavals can also be obtained.

1. Veselago, V. G., "The electrodynamics of substances with simultaneously negative values of permittivity and permeabilit y," Sov. Phys. Usp., Vol. 10, 509-514, 1968.
doi:10.1070/PU1968v010n04ABEH003699 Google Scholar

2. Pendry, J. B., "Negative refraction makes a perfect lens," Phys. Rev. Lett., Vol. 85, 3966-3969, Oct. 2000.
doi:10.1103/PhysRevLett.85.3966 Google Scholar

3. Ramakrishna, S. A., "Physics of negative refractive index materials," Rep. Prog. Phys., Vol. 68, 449-521, Feb. 2005.
doi:10.1088/0034-4885/68/2/R06 Google Scholar

4. Cui, T. J., D. R. Smith, and R. P. Liu, Metamaterials: Theory Design, and Applications, Springer, 2009.

5. Ziolkowski, R. W., "Propagation in and scattering from a matched metamaterial having a zero index of refraction," Phys. Rev. E, Vol. 70, 046608, Oct. 2004.
doi:10.1103/PhysRevE.70.046608 Google Scholar

6. Silveirinha, M. and N. Engheta, "Tunneling of electromagnetic energy through subwavelength channels and bends using ε-near-zero materials," Phys. Rev. Lett., Vol. 97, 157403, Oct. 2006.
doi:10.1103/PhysRevLett.97.157403 Google Scholar

7. Ahmed, S. and Q. A. Naqvi, "Directive EM radiation of a line source in the presence of a coated nihility cylinder," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 5-6, 761-771, 2009.
doi:10.1163/156939309788019886 Google Scholar

8. Zhou, H., Z. Pei, S. Qu, S. Zhang, J. Wang, Q. Li, and Z. Xu, "A planar zero-index metamaterial for directive emission," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 7, 953-962, 2009.
doi:10.1163/156939309788355289 Google Scholar

9. Qiao, S., G. A. Zheng, and L. X. Ran, "Enhancement of evanescent wave in an electrically anisotropic slab with partially negative permittivity tensor," Journal of Electromagnetic Waves and Applications, Vol. 22, No. 10, 1341-1350, 2008.
doi:10.1163/156939308786348965 Google Scholar

10. Fang, N., H. Lee, C. Sun, and X. Zhang, "Sub-diffraction-limited optical imaging with a silver superlens," Science, Vol. 308, 534-537, Apr. 2005.
doi:10.1126/science.1108759 Google Scholar

11. Korobkin, D., Y. Urzhumov, and G. Shvets, "Enhanced near-FIeld resolution in midinfrared using metamaterials," J. Opt. Soc. Am. B, Vol. 23, 468-478, Mar. 2005. Google Scholar

12. Taubner, T., D. Korobkin, Y. Urzhumov, G. Shvets, and R. Hillenbrand, "Near-Field microscopy through a SiC superlens," Science, Vol. 313, 1595, Sep. 2006.
doi:10.1126/science.1131025 Google Scholar

13. Ramakrishna, S. A., J. B. Pendry, M. C. K. Wiltshire, and W. J. Stewart, "Imaging the near Field," J. Mod. Optics, Vol. 50, 1419-1430, Jun. 2003. Google Scholar

14. Pendry, J. B. and S. A. Ramakrishna, "Refining the perfect lens," Physica B, Vol. 338, 329-332, Oct. 2003. Google Scholar

15. Belov, P. A., Y. Hao, and S. Sudhakaran, "Subwavelength imaging at optical frequencies using a transmission device formed by a periodic layered metal-dielectric structure operating in the canalization regime," Phys. Rev. B, Vol. 73, 113110, Mar. 2006.
doi:10.1103/PhysRevB.73.113110 Google Scholar

16. Shin, H. C. and S. H. Fan, "All-angle negative refraction and evanescent wave amplification using one-dimensional metallodi-electric photonic crystals," Appl. Phys. Lett., Vol. 89, 151102, Oct. 2006. Google Scholar

17. Wood, B., J. B. Pendry, and D. P. Tsai, "Directed subwavelength imaging using a layered metal-dielectric system," Phys. Rev. B, Vol. 74, 115116, Sep. 2006.
doi:10.1103/PhysRevB.74.115116 Google Scholar

18. Webb, K. J. and M. Yang, "Subwavelength imaging with a multilayer silver film structure," Opt. Lett., Vol. 31, 2130-2132, 2006.
doi:10.1364/OL.31.002130 Google Scholar

19. Feng, S. M. and J. M. Elson, "Diffraction-suppressed high-resolution imaging through metallodielectric nanofilms," Opt. Express, Vol. 14, 216-221, Jan. 2006.
doi:10.1364/OPEX.14.000216 Google Scholar

20. Scalora, M., G. D'Aguanno, N. Mattiucci, M. J. Bloemer, D. de Ceglia, M. Centini, A. Mandatori, C. Sibilia, N. Akozbek, M. G. Cappeddu, M. Fowler, and J. W. Haus, "Negative refraction and sub-wavelength focusing in the visible range using transparent metallo-dielectric stacks," Opt. Express, Vol. 15, 508-523, Jan. 2007.
doi:10.1364/OE.15.000508 Google Scholar

21. Bloemer, M., , G. D'Aguanno, N. Mattiucci, M. Scalora, and N. Akozbek, "Broadband super-resolving lens with high transparency in the visible range," Appl. Phys. Lett., Vol. 90, 174113, Apr. 2007.
doi:10.1063/1.2734496 Google Scholar

22. Li, G. X., H. L. Tam, F. Y. Wang, and K. W. Cheah, "Superlens from complementary anisotropic metamaterials," J. Appl. Phys., Vol. 102, 116101, Dec. 2007.
doi:10.1063/1.2817538 Google Scholar

23. Wang, C., Y. Zhao, D. Gan, C. Du, and X. Luo, "Subwavelength imaging with anisotropic structure comprising alternately layered metal and dielectric films," Opt. Express, Vol. 16, 4217-4227, Mar. 2008.
doi:10.1364/OE.16.004217 Google Scholar

24. De Ceglia, D., M. A. Vincenti, M. G. Cappeddu, M. Centini, N. Akozbek, A. D'Orazio, J. W. Haus, M. J. Bloemer, and M. Scalora, "Tailoring metallodielectric structures for superresolution and superguiding applications in the visible and near-ir ranges," Phys. Rev. A, Vol. 77, 033848, Mar. 2008.
doi:10.1103/PhysRevA.77.033848 Google Scholar

25. Shi, L. H. and L. Gao, "Subwavelength imaging from a multilayered structure containing interleaved nonspherical metal-dielectric composites," Phys. Rev. B, Vol. 77, 195121, May 2008.
doi:10.1103/PhysRevB.77.195121 Google Scholar

26. Li, X. and F. Zhuang, "Multilayered structures with high sub-wavelength resolution based on the metal-dielectric composites," J. Opt. Soc. Am. A, Vol. 26, 2521-2525, Dec. 2009.
doi:10.1364/JOSAA.26.002521 Google Scholar

27. Kotynki, R. and T. Stefaniuk, "Multiscale analysis of subwave-length imaging with metal-dielectric multilayers," Opt. Lett., Vol. 35, 1133-1135, Apr. 2010.
doi:10.1364/OL.35.001133 Google Scholar

28. Avrutsky, I., I. Salakhutdinov, J. Elser, and V. Podolskiy, "Highly confined optical modes in nanoscale metal-dielectric multilayers," Phys. Rev. B, Vol. 75, 241402, Jun. 2007.
doi:10.1103/PhysRevB.75.241402 Google Scholar

29. Aspnes, D. E., "Local-field effects and effective-medium theory: A microscopic perspective," Am. J. Phys., Vol. 50, 704-709, 1982.
doi:10.1119/1.12734 Google Scholar

30. Alu, A., M. G. Silveirinha, A. Salandrino, and N. Engheta, "Epsilon-near-zero metamaterials and electromagnetic sources: Tailoring the radiation phase pattern," Phys. Rev. B, Vol. 75, 155410, Apr. 2007.
doi:10.1103/PhysRevB.75.155410 Google Scholar

31. Chew, W. C., Waves and Fields in Inhomogeneous Media, IEEE Press, 1995.

32. Luo, C. Y., S. G. Johnson, J. D. Joannopoulos, and J. B. Pendry, "Subwavelength imaging in photonic crystals," Phys. Rev. B, Vol. 68, 045115, Jul. 2003. Google Scholar

33. Moreno, E., F. J. Garcia-Vidal, and L. Martin-Moreno, "Enhanced transmission and beaming of light via photonic crystal surface modes," Phys. Rev. B, Vol. 69, 121402, Mar. 2004.
doi:10.1103/PhysRevB.69.121402 Google Scholar

34. Jin, Y. and S. L. He, "Negative refraction of complex lattices of dielectric cylinders," Phys. Lett. A, Vol. 360, 461-466, Jan. 2007.
doi:10.1016/j.physleta.2006.06.011 Google Scholar

35. Jin, Y., X. Li, and S. L. He, "Canalization for subwavelength focusing by a slab of dielectric photonic crystal," Phys. Rev. B, Vol. 75, 195126, May 2007.
doi:10.1103/PhysRevB.75.195126 Google Scholar

36. Elser, J., V. A. Podolskiy, I. Salakhutdinov, and I. Avrutsky, Nonlocal effects in effective-medium response of nanolayered metamaterials, Vol. 90, 191109, May 2007. Google Scholar

Dr. Yi Jin