【24h】

Optical light controlled band edge switch

机译:光控带边开关

获取原文

摘要

We study a mechanism of the light-by-light control, based on changing the refractive index of the narrow-band layers in a semiconductor photonic band gap structures (PBGS). This changing is caused by the contribution of the non-equilibrium charge carriers generated by the controlling radiation. We show that this mechanism can be efficient if an optimal controlling light wavelength is taken near the proper absorption edge of the narrow-band semiconductor layers, since the little changes of the layers refractive indexes at the band gap edge of PBGS cause essential change of the transmission characteristics. The modulation depth of the controlled light of more than 90% is achieved for the PBGS based on GaAs at the wavelength 1.5 /spl mu/m under the controlling light power equal to 5.9 kW/cm/sup 2/. The inertia of the mechanism considered is determined by the lifetime of the non-equilibrium charge carriers in semiconductor layers and is equal to 10/sup -7/ s in our case.
机译:我们基于改变半导体光子带隙结构(PBGS)中窄带层的折射率,研究了按光控制的机制。这种变化是由控制辐射产生的非平衡电荷载流子的贡献引起的。我们表明,如果在窄带半导体层的适当吸收边缘附近获取最佳控制光波长,则该机制可能是有效的,因为PBGS的带隙边缘处的层折射率的微小变化会导致PBGS的本质变化。传输特性。在等于5.9 kW / cm / sup 2 /的控制光功率下,基于GaAs的PBGS在波长1.5 / spl mu / m的情况下,可控光的调制深度达到90%以上。所考虑的机制的惯性由半导体层中非平衡电荷载流子的寿命决定,在我们的情况下等于10 / sup -7 / s。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号