TY - JOUR
T1 - InGaAs nano-photodiode enhanced using polarization-insensitive surface-plasmon antennas
AU - Okamoto, Daisuke
AU - Fujikata, Junichi
AU - Ohashi, Keishi
PY - 2011/12
Y1 - 2011/12
N2 - We propose InGaAs nano-photodiodes incorporated with a ring-type polarization-insensitive surface-plasmon (SP) antenna, which consists of gold concentric-ring gratings. This ring antenna induces SP resonance for any polarization of incident light and enhances light absorption in a thin InGaAs layer owing to its symmetric structure. Finite-difference time-domain simulations suggest that the carefully designed ring SP antenna can achieve a quantum efficiency of more than 70% for a wide wavelength range and a maximum efficiency of about 80%. A 3 dB bandwidth of 21 GHz and an external responsivity of 0.39A/W were experimentally demonstrated at a 1.55 μm wavelength.
AB - We propose InGaAs nano-photodiodes incorporated with a ring-type polarization-insensitive surface-plasmon (SP) antenna, which consists of gold concentric-ring gratings. This ring antenna induces SP resonance for any polarization of incident light and enhances light absorption in a thin InGaAs layer owing to its symmetric structure. Finite-difference time-domain simulations suggest that the carefully designed ring SP antenna can achieve a quantum efficiency of more than 70% for a wide wavelength range and a maximum efficiency of about 80%. A 3 dB bandwidth of 21 GHz and an external responsivity of 0.39A/W were experimentally demonstrated at a 1.55 μm wavelength.
UR - http://www.scopus.com/inward/record.url?scp=82955202633&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=82955202633&partnerID=8YFLogxK
U2 - 10.1143/JJAP.50.120201
DO - 10.1143/JJAP.50.120201
M3 - Article
AN - SCOPUS:82955202633
SN - 0021-4922
VL - 50
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 12
M1 - 120201
ER -