Improved spectral response of an InAs QD RC-SACM-APD with Ta 2O5/SiO2 DBRs

Dong Ho Kim, Hong Joo Song, Cheong Hyun Roh, Cheol Koo Hahn, Shi Jong Leem, Noriaki Tsurumachi, Tae Geun Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We report the improvement in the spectral response of an InAs QD resonant-cavity separate absorption, charge, and multiplication avalanche photodetector (RC-SACM-APD) by increasing the quantum efficiency (QE) using dielectric Ta2O5/SiO2 top distributed Bragg reflectors (DBRs). The reflectivities of the top and bottom DBRs were numerically designed to be 70% and 99.1%, respectively, in order to maximize the QE. The spectral response characteristics of the InAs QD RC-SACM-APD with enhanced top DBRs was remarkably improved at 1098 nm, which is close to the target wavelength of 1100 nm, and its full width at half-maximum (FWHM) was 19 nm. The photoluminescence (PL) spectra revealed an intense and narrow single-mode peak at 1101 nm. The FWHM of the PL peak was as narrow as 8 nm and the difference in wavelength between the spectrum and the PL peak was as small as 3 nm.

Original languageEnglish
Title of host publication2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007, Proceedings
Pages681-685
Number of pages5
DOIs
Publication statusPublished - 2007
Event2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007 - Hong Kong, China
Duration: 2007 Aug 22007 Aug 5

Publication series

Name2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007, Proceedings

Other

Other2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007
CountryChina
CityHong Kong
Period07/8/207/8/5

Keywords

  • Quantum efficiency (QE)
  • Resonant-cavity effect (RCE)
  • Spectral response characteristic
  • Wavelength-selective-absorption

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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