Guided-mode resonance based multicolor germanium infrared photodetector
17th International Conference on Numerical Simulation of Optoelectronic Devices NUSOD, Santa-Barbara, Honduras, 24 - 28 July 2017, pp.209-210, (Full Text)
- Publication Type: Conference Paper / Full Text
- Doi Number: 10.1109/nusod.2017.8010065
- City: Santa-Barbara
- Country: Honduras
- Page Numbers: pp.209-210
- TED University Affiliated: Yes
Abstract
A compact low-cost multicolor germanium (Ge) infrared photodetector is designed by utilizing the guided-mode resonance condition of a one-dimensional grating with adiabatically tuned (or so-called chirped) in-plane periodicity. It is shown numerically that the resonance phenomenon is accompanied by a spectral splitting, as every wavevector component is matched with different instantaneous local in-plane periods. In result, the proposed photodetector enables multi-wavelength photon absorption up to 61% efficiency and an ideal responsivity up to 0.63 A/W over a 70 nm bandwidth, while maintaining a very small active region of 0.413 mu m(2). The reported results provide a very valuable insight into highly miniaturized ultra-compact multicolor photodetection schemes.