CAJ | 학술논문

设计了基于孔型硅光子晶体的折叠式马赫-曾德尔干涉仪.它由一个光反射器和几个光分束器构成.在干涉仪中,窄光束依赖自准直效应进行传输.利用时域有限差分法研究了折叠式马赫-曾德尔干涉仪的特性.结果表明,在0.255~0.270c/a的归一化频率范围内,干涉仪的两个透射谱均为正弦形且强度互补,透射谱的透射峰间距随着干涉仪两臂的光程差的增大而减小.该折叠式干涉仪结构紧凑,尺寸比非折叠式光子晶体马赫-曾德尔干涉仪要小许多,有望作为信道解复用器应用于光子芯片中.
설계료기우공형규광자정체적절첩식마혁-증덕이간섭의.타유일개광반사기화궤개광분속기구성.재간섭의중,착광속의뢰자준직효응진행전수.이용시역유한차분법연구료절첩식마혁-증덕이간섭의적특성.결과표명,재0.255~0.270c/a적귀일화빈솔범위내,간섭의적량개투사보균위정현형차강도호보,투사보적투사봉간거수착간섭의량비적광정차적증대이감소.해절첩식간섭의결구긴주,척촌비비절첩식광자정체마혁-증덕이간섭의요소허다,유망작위신도해복용기응용우광자심편중.
A folded Mach-Zehnder interferometer in a hole-type silicon photonic crystal is proposed, which consists of one splitter and several mirrors. Light propagates between them employing self-collimation effect. Its performance is investigated based on finite-difference time-domain simulation technique. The two complementary transmission spectra at two output ports are both in the shape of sinusoidal curves in the frequency range from 0.255c/a to 0.270c/a. The peak spacing becomes smaller when the length difference between the two interfering branches is increased. This folded Mach-Zehnder interferometer with compact structure is much smaller than non-folded interference-type filters in photonic crystals. It may work as a wavelength division demultiplexer in high-density photonic integrated circuits.