RECONFIGURABLE OPTICAL-PROPERTIES IN INGAN GAN QUANTUM-WELLS/

Reconfigurable optical properties were studied in InGaN/GaN multiple q uantum well (MQW) structures. It was observed that a short time exposu re to a high intensity ultraviolet light results in long term, but rev ersible changes of the optical properties of InGaN/GaN MQW samples. Th e photoinduced changes can be observed using an optical microscope und er low intensity ultraviolet light and are visible as a high contrast pattern. The retention time at room temperature for 12 and 20 MQW samp les was longer than five days and four weeks, respectively. The effect was studied at room and cryogenic temperatures. (C) 1997 American Ins titute of Physics.