Guided-mode resonance based multicolor germanium infrared photodetector

Yilmaz Y. A., Hayran Z., Yildiz F., Kilinc T. O., Karabacak C., Bor E., ...More

17th International Conference on Numerical Simulation of Optoelectronic Devices NUSOD, Santa-Barbara, Honduras, 24 - 28 July 2017, pp.209-210 identifier identifier

  • 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


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.