,A compact in-plane photonic crystal channel drop filter

• 机 构: State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering
• 出 处: 中国物理B(英文版)
• 发表日期: 2011年7期
• 关键词: photonic band gap materials integrated optics optical waveguides optical communi

This paper presents a novel in-plane photonic crystal channel drop filter.The device is composed of a resonant cavity sandwiched by two parallel waveguides.The cavity has two resonant modes with opposite symmetries.Tuning these two modes into degeneracy causes destructive interference in bus waveguide,which results in high forward drop efficiency at the resonant wavelength.From the result of numerical analysis by using two-dimensional finite-difference time-domain method,the channel drop filter has a drop e...","This paper presents a novel in-plane photonic crystal channel drop filter.The device is composed of a resonant cavity sandwiched by two parallel waveguides.The cavity has two resonant modes with opposite symmetries.Tuning these two modes into degeneracy causes destructive interference in bus waveguide,which results in high forward drop efficiency at the resonant wavelength.From the result of numerical analysis by using two-dimensional finite-difference time-domain method,the channel drop filter has a drop efficiency of 96%and a Q value of over 3000,which can be used in dense wavelength division multiplexing systems.