TY - GEN
T1 - Improved spectral response of an InAs QD RC-SACM-APD with Ta 2O5/SiO2 DBRs
AU - Kim, Dong Ho
AU - Song, Hong Joo
AU - Roh, Cheong Hyun
AU - Hahn, Cheol Koo
AU - Leem, Shi Jong
AU - Tsurumachi, Noriaki
AU - Kim, Tae Geun
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
KW - Quantum efficiency (QE)
KW - Resonant-cavity effect (RCE)
KW - Spectral response characteristic
KW - Wavelength-selective-absorption
UR - http://www.scopus.com/inward/record.url?scp=52949105783&partnerID=8YFLogxK
U2 - 10.1109/NANO.2007.4601281
DO - 10.1109/NANO.2007.4601281
M3 - Conference contribution
AN - SCOPUS:52949105783
SN - 1424406080
SN - 9781424406081
T3 - 2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007, Proceedings
SP - 681
EP - 685
BT - 2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007, Proceedings
T2 - 2007 7th IEEE International Conference on Nanotechnology - IEEE-NANO 2007
Y2 - 2 August 2007 through 5 August 2007
ER -