期刊
OPTICS LETTERS
卷 34, 期 19, 页码 2921-2923出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.34.002921
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资金
- National Science Foundation (NSF) CAREER [0546928]
- NSF CBET [0932673]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0932673] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [0546928] Funding Source: National Science Foundation
We describe the fabrication, simulation, and measurement of a terahertz (THz) filter composed of nano-porous silicon multilayers. Using electrochemical etching, we fabricated a structure composed of alternating high- and low-index layers that achieves 93% power reflectivity at the target wavelength of 1.17 THz, with a stopband of 0.26 THz. The measured reflection and transmission spectra of the multilayer filter show excellent agreement with calculations based on the refractive indices determined separately from single-layer measurements. This technique could provide a convenient, flexible, and economical way to produce THz filters, which are essential in a variety of future applications. (C) 2009 Optical Society of America
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