Design of 1.33 μm and 1.55 μm Wavelengths Quantum Cascade Photodetector

• 作者: A. Rostami S. Khosravi
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 工学
• 关键词: QUANTUM Cascade PHOTODETECTOR III-NITRIDE Multi QUANTUM Well RESPONSIVITY and DETECTIVITY
• 年，卷（期）: 2017,（8）
• 页码范围: 116-126
• 页数: 11页
• 分类号: TN3

摘要

In this paper, a quantum cascade photodetector based on intersubband transitions in quantum wells with ability of detecting 1.33 μm and 1.55 μm wavelengths in two individual current paths is introduced. Multi quantum wells structures based on III-Nitride materials due to their large band gaps are used. In order to calculate the photodetector parameters, wave functions and energy levels are obtained by solving 1-D Schrodinger–Poisson equation self consistently at 80 ?K. Responsivity values are about 22 mA/W and 18.75 mA/W for detecting of 1.33 μm and 1.55 μm wavelengths, respectively. Detectivity values are calculated as 1.17 × 107 (Jones) and 2.41 × 107 (Jones) at wavelengths of 1.33 μm and 1.55 μm wavelengths, respectively.