Fabrication and characterization of terahertz photonic crystals

被引：4

作者：

Chi, CC ^{[1
]}

Wang, HD ^{[1
]}

Pai, SS ^{[1
]}

Lai, WC ^{[1
]}

Horng, S ^{[1
]}

Huang, RSS ^{[1
]}

机构：

[1] Natl Tsing Hua Univ, Dept Phys, Hsinchu 30043, Taiwan

来源：

ULTRAFAST PHENOMENA IN SEMICONDUCTORS VI | 2002年 / 4643卷

关键词：

terahertz waves; photonic crystals; time-domain THz spectrometer; finite size effects;

D O I：

10.1117/12.470424

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

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. The agreement is better at frequencies lower than 0.4 THz, while it becomes worse at higher frequencies. At oblique incidence, the wave vector direction inside the photonic crystal depends on both incident angle and frequency. The calculated direction from the 2D energy dispersion determines the experimentally observed transmission spectrum. The agreement between die measured results and calculation is reasonable. though some discrepancies remain unaccountable.

引用

页码：19 / 30

页数：12

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