Research and development of ultra-high speed and low-driving voltage spatial light modulators

2015 Fiscal Year Final Research Report

• Project/Area Number: 24560427
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: Chubu University
• Principal Investigator: WAKITA KOICHI 中部大学, 生命健康科学部, 教授 (20301640)
• Co-Investigator(Kenkyū-buntansha): TAKAHASHI Makoto 中部大学, 工学部, 教授 (10236317)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 高速 / 低電圧駆動 / 室温励起子吸収 / 高純度 / 厚い空乏層 / 電気吸収効果 / 電気光学効果 / 空間光変調器

Outline of Final Research Achievements

For realizing the ultra-high speed and ultra-parallel optical processing, ultra-high purity GaAs epitaxial layers have been grown by liquid-phase epitaxy and clear exciton absorption and its large red-shift associated with applied voltage have been observed at room temperature. Large on-off ratio larger than 20dB by less than 10 V and subnano sec responce have been demonstrated and estimated. These data overcome reported data (1000V and a few msec response) and indicate the possibility of next generation spatial light modulator (SLM) in place of liquid crystal SLMs and magnetic resistance SLMs.
A large refractive index change (about 2 times larger than reported data) associated with observed large electroabsorption has been estimated based on the Kramers- Kroenig relation-ship.

Free Research Field

光エレクトロニクス