Inverse design and implementation of a wavelength demultiplexing grating coupler

• DOI: 10.1038/srep07210
• Publication Date: 2014-11-27T10:17:16Z
• Authors: Alexander Y. Piggott; Jesse Lu; Thomas M. Babinec; Konstantinos G. L...; Jan Petykiewicz; Jelena Vučković
• Keywords: Nanophotonics; Gaussian beam

Abstract Nanophotonics has emerged as a powerful tool for manipulating light on chips. Almost all of today's devices, however, have been designed using slow and ineffective brute-force search methods, leading in many cases to limited device performance. In this article, we provide complete demonstration our recently proposed inverse design technique, wherein the user specifies constraints form target fields rather than dielectric constant profile particular use method demonstrate new demultiplexing grating. The novel grating, which not developed conventional techniques, accepts vertical-incident Gaussian beam from free-space separates O-band (1300 nm) C-band (1550 into separate waveguides. This concept is simple extendable broad class highly compact devices including frequency filters, mode converters spatial multiplexers.