Swept-Centre-Frequency Reflection Performance of Light-Induced Variable-Period Plasma Gratings

摘要

This paper reports theoretical and experimental investigations of an optoelectronically generated mask-controlled distributed Bragg reflection (DBR) coplanar waveguide filter on a CdS/CdSe-Al_2O_3 -substrate with a built-in 10-stage plasma grating of variable centre frequency operated under swept-slotwidth condition. The specific microwave reflection performance during a full sweep cycle of the rotating cylindrical fan-shaped slot-array mask used is discussed as a function of slot-array geometry, sweep time, carrier lifetime, and centre frequency.