Hybrid superprism with low insertion losses and suppressed cross-talk

作     者：Jeremy Witzens Thomas Baehr-Jones Axel Scherer 

作者机构：Department of Electrical Engineering California Institute of Technology Mail Code 136-93 Pasadena California 91125 USA 

出 版 物：《Physical Review E》 (物理学评论E辑：统计、非线性和软体物理学)

年 卷 期：2005年第71卷第2期

页      面：026604-026604页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

主　　题：PLANAR-PHOTONIC CRYSTALS SELF-COLLIMATED BEAMS NEGATIVE REFRACTION WAVE-GUIDES MODE TRANSMISSION PROPAGATION EFFICIENCY 

摘      要：We demonstrate with the two-dimensional finite-difference time-domain method that an adiabatic transition in a superprism with an interface along the [12¯] direction enhances the transmission through the superprism to more than 90% (−0.5dB) over the wavelength range 1.47–1.68 μm, including the telecommunication C and L bands. We also show that diffraction governed by a quasinegative index of refraction inside the superprism can be used to obtain nearly transform-limited beam widths at the output of the superprism. The reduction of the beam width at the output suppresses cross-talk and greatly enhances the achievable frequency resolution of the superprism.