Double-resonance enhanced intersubband second-order nonlinear optical susceptibilities in GaN/AlGaN step quantum wells.

@article{Wu2014DoubleresonanceEI,
  title={Double-resonance enhanced intersubband second-order nonlinear optical susceptibilities in GaN/AlGaN step quantum wells.},
  author={Feng Wu and Weiwei Tian and Jiasen Zhang and Shutao Wang and Qun Wan and Jing Dai and Zhong Hua Wu and Jintong Xu and Xing Yi Li and Yan Yan Fang and Changqing Chen},
  journal={Optics express},
  year={2014},
  volume={22 12},
  pages={14212-20}
}
Second-order nonlinear optical susceptibilities for second harmonic generation (SHG) associated with intersubband transitions in GaN/AlGaN single quantum well and step quantum well have been studied theoretically by solving Schrödinger and Poisson equations self-consistently. The calculated results suggest that due to the very large polarization-induced field in the quantum well, the potential profile becomes asymmetrical, leading to large second-order susceptibilities. A high value about 4… CONTINUE READING