Open AccessSemipolar ( 20 21 ¯ ) InGaN/GaN micro-photodetector for gigabit-per-second visible light communication
Author(s) -
Chun Hong Kang,
Guangyu Liu,
Changmin Lee,
Omar Alkhazragi,
Jonathan M. Wagstaff,
KuangHui Li,
Fatimah Alhawaj,
Tien Khee Ng,
James S. Speck,
Shuji Nakamura,
Steven P. DenBaars,
Boon S. Ooi
Publication year - 2019
Publication title -
applied physics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.911
H-Index - 94
eISSN - 1882-0786
pISSN - 1882-0778
DOI - 10.7567/1882-0786/ab58eb
Subject(s) - visible light communication , gigabit , photodetector , responsivity , optoelectronics , materials science , bandwidth (computing) , modulation (music) , keying , optics , optical communication , physics , computer science , light emitting diode , telecommunications , acoustics
This paper investigated the use of semipolar InGaN/GaN multiple quantum well based micro-photodetectors ( μ PDs) as the optical receiver for visible light communication (VLC). The fabricated semipolar μ PDs exhibited a low dark current of 1.6 pA at −10 V, a responsivity of 0.191 A W −1 , and a −3 dB modulation bandwidth of 347 MHz. A high data rate of up to 1.55 Gbit s −1 was achievable by utilizing the extended bandwidth of more than −10 dB, and based on a straight-forward non-return-to-zero on–off keying modulation scheme. This development demonstrated the feasibility of wavelength-selective detection scheme using semipolar μ PD for high-data-capacity VLC systems.