Channel drop filters in woodpile-heterostructures

Abstract

Channel drop-filter is essential building blocks of transceivers that are the workhorse of Gbps communication and enable the emerging 100 Gb/s technology. Using finite difference time domain method, heterostructures based channel drop filter in microwave region involving resonant system (in woodpile structure) are designed, analyzed, and simulated. Our simulations using hetero-woodpile-structures show that the resonant modes can be effectively adjusted in various ways, such as only changing the distance of two cavities or changing the lattice constants in the core woodpile. When bus/drop waveguides and resonant systems are located in different layers, we find that there is a resonant band.