兆赫波段二維光子晶體之設計製作與分析

Design, Fabrication and Analysis of Two-Dimensional Terahertz Photonic Crystals

洪勝富(Sheng-Fu Horng) ； 齊正中(Cheng-Chung Chi) ； 黃瑞星(Ruey-Shing Star Huang)

《科儀新知》 147期 (2005/08) Pp. 16-23

https://doi.org/10.29662/IT.200508.0002

摘要

使用高電阻值Si晶片堆疊，可製作兆赫波段光子晶體。我們量測分析不同晶片數堆疊的兆赫波穿透。在垂直入射，發現兆赫波穿透十分快速的收斂到定值，只要三片Si晶片所觀測到的穿透率已經接近無限大晶體之情況。在0.4 THz以下，所量測的結果已有相當好的吻合，如採用正確形狀的晶胞以計算矩陣元，則吻合度可以進一步改善。本文同時也探討了斜向入射的情形。

並列摘要

Two dimensional (2D) terahertz (THz) photonic crystals were fabricated by stacking micro-machined high-resistance silicon substrates. The transmission spectra through 1 to 8 stacked silicon substrates with polarization parallel and perpendicular to the grooves were measured. At normal incidence with either polarization the normalized transmission spectrum quickly converges as the number of stacked substrates increases. For as few as three stacked Si substrates, the observed transmission spectra for the first two bands converge reasonably well to the calculated results for an infinite lattice. Agreement between measurements and calculations is obtained at frequencies lower than 0.4 THz and can be further improved with matrix elements calculated from actual geometry. Oblique incidence is also measured and analyzed.