Open AccessDesign optimization for bright electrically-driven quantum dot single-photon sources emitting in telecom O-band
Author(s) -
S. A. Blokhin,
M. A. Bobrov,
N. A. Maleev,
Jan N. Donges,
Lucas Bremer,
A. A. Blokhin,
А. П. Васильев,
A. G. Kuzmenkov,
E. S. Kolodeznyi,
V. A. Shchukin,
N. N. Ledentsov,
Stephan Reitzenstein,
V. M. Ustinov
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.415979
Subject(s) - optics , photon , fiber bragg grating , optoelectronics , materials science , quantum dot , broadband , physics , optical fiber
A combination of advanced light engineering concepts enables a substantial improvement in photon extraction efficiency of micro-cavity-based single-photon sources in the telecom O-band at ∼1.3 µm. We employ a broadband bottom distributed Bragg reflector (DBR) and a top DBR formed in a dielectric micropillar with an additional circular Bragg grating in the lateral plane. This device design includes a doped layer in pin-configuration to allow for electric carrier injection. It provides broadband (∼8-10 nm) emission enhancement with an overall photon-extraction efficiency of ∼83% into the upper hemisphere and photon-extraction efficiency of ∼79% within numerical aperture NA=0.7. The efficiency of photon coupling to a single-mode fiber reaches 11% for SMF28 fiber (with NA=0.12), exceeds 22% for 980HP fiber (with NA=0.2) and reaches ∼40% for HNA fiber (with NA=0.42) as demonstrated by 3D finite-difference time-domain modeling.