IMPROVED PERFORMANCES OF A S-SEED USING EXTREMELY SHALLOW QUANTUM-WELLS AND ASYMMETRIC FABRY-PEROT CAVITY STRUCTURE

We report significantly improved performances of a symmetric self-elec trooptic effect device (S-SEED) showing high ON-OFF contrast ratio (> 30:1) and large optical bistability loop widths (Delta P = 44%) at the applied bias of V-a = 0 V, i.e., with no power supply. Our S-SEED is made of extremely shallow quantum-wells (ESQW's) in asymmetric Fabry-P erot (AFP) cavity structure. At V-a = 5 V, Delta P increased up to 95% , preserving the high-contrast ratio. The reflectivity changes at V-a = 0 and 5 V were about 15% and 30%, respectively. To the best of our k nowledge, these are the largest values ever reported from such structu res.