Department of Electronic Systems Engineering School of Engineering, the University of Shiga Prefecture, Hikone, Shiga, 522-8533, Japan.
Opt Lett. 2011 Oct 1;36(19):3882-4. doi: 10.1364/OL.36.003882.
A mid-IR wire-grid polarizer with a 500 nm pitch was fabricated on a low toxic chalcogenide glass (Sb-Ge-Sn-S system) by the thermal imprinting of periodic grating followed by the thermal evaporation of Al metal. After imprinting, deposition of Al on the grating at an oblique angle produced a wire-grid polarizer. The fabricated polarizer showed polarization with TM transmittance greater than 60% at 5-9 μm wavelengths and an extinction ratio greater than 20 dB at 3.5-11 μm wavelengths. This polarizer with a high extinction ratio can be fabricated more simply and less expensively than conventional IR polarizers.
通过周期性光栅的热压印和随后的 Al 金属热蒸发，在低毒硫属玻璃（Sb-Ge-Sn-S 体系）上制造出了一款 500nm 节距的中红外线栅偏振器。压印后，以倾斜角度在光栅上沉积 Al 会产生线栅偏振器。所制造的偏振器在 5-9μm 波长下表现出 TM 透过率大于 60%的偏振特性，在 3.5-11μm 波长下的消光比大于 20dB。与传统的红外偏振器相比，这种具有高消光比的偏振器可以更简单、更经济地制造。
