Analysis of millimeter wave phase shifters coupled to a fixed periodic structure

Periodically Photoinduced Bragg Reflection Filter

“…si Kz) (6) where a / A is the duty cycle ofthe periodic structure or i other words a is the length of photoexcited section, K = 2t I A is the spatial frequency of the periodic structure and x osi-P d+t-tphexrdwt 0O otherie (7) where q 2=p52 -k 2o u2 = ko 2 …”

“…By periodical illumination on a high resisfivity semiconductor waveguide, leaky wave radiation and Bragg reflection could be observed and has been reported in [1][2][3]. Also, a fiber optically controlled distributed Bragg reflection filter on a silicon coplanar waveguide [6] and semiconductor loaded on corrugated dielectric waveguide has been investigated [7,8]. All these investigations have non-permanent and optically controllable features.…”

Novel optical devices based on surface wave excitation at conducting interfaces

“…In this class of devices, Jung et al [13] investigated integrated optics waveguide modulator based on surface plasmon resonance which is theoretically capable of switching speeds in the gigahertz range, but it is limited to TM polarized waves, and is lossy. Liu et al [14] proposed an optical switch using light induced plasma layer. They have used the impact of optically controlled plasma layer on the propagation and attenuation constants.…”