Design optimization for bright electrically-driven quantum dot single-photon sources emitting in telecom O-band.
Opt Express
; 29(5): 6582-6598, 2021 Mar 01.
Article
en En
| MEDLINE
| ID: mdl-33726176
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 â¼1.3â
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 (â¼8-10â
nm) emission enhancement with an overall photon-extraction efficiency of â¼83% into the upper hemisphere and photon-extraction efficiency of â¼79% 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 â¼40% for HNA fiber (with NA=0.42) as demonstrated by 3D finite-difference time-domain modeling.
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01-internacional
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MEDLINE
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En
Revista:
Opt Express
Asunto de la revista:
OFTALMOLOGIA
Año:
2021
Tipo del documento:
Article
Pais de publicación:
Estados Unidos