Title :
Optically-controlled tunable CPW resonators
Author :
Islam, M.S. ; Cheung, P. ; Chang, C.Y. ; Neikirk, D.P. ; Itoh, T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
Abstract :
The use of a Schottky-biased, optically controlled, coplanar waveguide (CPW) in a microwave resonator is investigated. A prototype device consisting of a CPW atop a lightly doped GaAs epi-layer on a semi-insulating GaAS substrate has been fabricated and tested. By using Schottky-contacted metal electrodes to reduce loss and increase optical sensitivity, tunable resonance has been achieved, with resonator Qs of approximately 8.4 for resonance near 10 GHz, and a tuning range of about 125 MHz at an optical illumination power of only 34 mW/cm/sup 2/.<>
Keywords :
III-V semiconductors; cavity resonators; gallium arsenide; solid-state microwave devices; waveguide components; 10 GHz; Q-factor; Schottky biased optically controlled coplanar waveguide; Schottky-contacted metal electrodes; lightly doped GaAs epilayer; microwave resonator; optical illumination power; optical sensitivity; semiinsulating GaAs substrate; tunable resonance; tuning range; Coplanar waveguides; Gallium arsenide; Microwave devices; Optical control; Optical resonators; Optical sensors; Optical waveguides; Prototypes; Resonance; Testing;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99735
