Presentation Information
[9p-A13-4]Optimization of Bias Voltage and Wavelength Dependence of the Responsivity in Quantum Cascade Photodetectors
〇Shinji Saito1, Rei Hashimoto2, Kei Kaneko2, Tsutomu Kakuno2, Tomoki Tsukada2, Lisa Suzuki Lisa12, Shigeru Yamaguchi3, Afshan Begum4, Naoki Ikeda4, Takaaki Mano4, Keisuke Watanabe4, Takashi Kuroda4, Kazuak Sakoda4 (1.Shonan Inst. Tech., 2.Toshiba Corp., 3.Tokai Univ., 4.NIMS)
Keywords:
QCL,Quantum cascade detector,Photonic crystal
In quantum cascade structures, the emission and detection wavelengths can be engineered by adjusting the well and barrier widths. In this study, we focus on the wavelength mismatch between the optical gain under biased operation and the optical absorption under zero bias. By optimizing the quantum well structure, it is shown that the absorption at the emission wavelength under zero-bias conditions can be enhanced by approximately 1.5 times, while maintaining the emission wavelength.