Infrared polarizer based on direct coupling to surface-plasmon polaritons

Autor:	Shahsafi, A., Salman, J., Perez, B. E. Rubio, Xiao, Y., Wan, C., Kats, M. A.
Rok vydání:	2020
Předmět:	Physics - Optics Physics - Applied Physics Physics - Instrumentation and Detectors
Druh dokumentu:	Working Paper
DOI:	10.1021/acs.nanolett.0c02492
Popis:	We propose a new type of reflective polarizer based on polarization-dependent coupling to surface-plasmon polaritons (SPPs) from free space. This inexpensive polarizer is relatively narrowband but features an extinction ratio of up to 1000 with efficiency of up to 95% for the desired polarization (numbers from a calculation), and thus can be stacked to achieve extinction ratios of 106 or more. As a proof of concept, we experimentally realized a polarizer based on nanoporous aluminum oxide that operates around a wavelength of 10.6 um, corresponding to the output of a CO2 laser, using aluminum anodization, a low-cost electrochemical process. Comment: Main text + supplementary
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2006.09249 Zobrazit plný text záznamu View this record from Arxiv