Modeling of enhanced second-harmonic generation with phase-matching in periodic subwavelength structure metal film

Min Yan Quan; Li Zhan; Gang Sun; S. Y. Luo; Qing Hao Ye; Yuxing Xia

doi:10.1117/12.574925

31 January 2005 Modeling of enhanced second-harmonic generation with phase-matching in periodic subwavelength structure metal film

Min Yan Quan, Li Zhan, Gang Sun, S. Y. Luo, Qing Hao Ye, Yuxing Xia

Author Affiliations +

Proceedings Volume 5624, Semiconductor and Organic Optoelectronic Materials and Devices; (2005) https://doi.org/10.1117/12.574925
Event: Asia-Pacific Optical Communications, 2004, Beijing, China

Abstract

The recent observation of enhanced optical transmission through a periodic array of subwavelength apertures in a metal film has elicited significant interest both because it represents a novel phenomenon and because it raises the prospect of a series of new applications. Recently, an ~10⁴ increase in conversion efficiency of second harmonic generation (SHG) from a periodically nanostructured silver film structure consisting of a single subwavelength aperture surrounded by a set of concentric surface grooves was reported. Although the phase-matching condition for extraordinary transmission has been discussed by many researchers, the phase-matching conditions of SHG process was neglected in former experiments. In this paper, we design a silver film with two different sets of periods on a quartz substrate with the silver thickness of 20nm in order to excite long-range surface plasma wave that could transmit millimeter-order distance in the metal surface, which greatly contribution to the improvement of the conversion efficiency of SHG for about 10² times. The fundamental light is perpendicularly coupled into the metal film with about 29 percent coupling efficiency, and the direction of the transmitted SH light is also perpendicular to the metal surface. Furthermore, this new type of structure could contribute to high conversion efficiency of SHG for the virtues of low losses, extremely compact structure and easily fabrication process.

Citation Download Citation

Min Yan Quan, Li Zhan, Gang Sun, S. Y. Luo, Qing Hao Ye, and Yuxing Xia "Modeling of enhanced second-harmonic generation with phase-matching in periodic subwavelength structure metal film", Proc. SPIE 5624, Semiconductor and Organic Optoelectronic Materials and Devices, (31 January 2005); https://doi.org/10.1117/12.574925

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