In-plane resonant excitation of quantum dots in a dual-mode photonic-crystal waveguide with high beta-factor
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In-plane resonant excitation of quantum dots in a dual-mode photonic-crystal waveguide with high beta-factor. / Zhou, Xiaoyan; Lodahl, Peter; Midolo, Leonardo.
In: Quantum Science and Technology, Vol. 7, No. 2, 025023, 01.04.2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - In-plane resonant excitation of quantum dots in a dual-mode photonic-crystal waveguide with high beta-factor
AU - Zhou, Xiaoyan
AU - Lodahl, Peter
AU - Midolo, Leonardo
PY - 2022/4/1
Y1 - 2022/4/1
N2 - A high-quality quantum dot (QD) single-photon source is a key resource for quantum information processing. Exciting a QD emitter resonantly can greatly suppress decoherence processes and lead to highly indistinguishable single-photon generation. It has, however, remained a challenge to implement strict resonant excitation in a stable and scalable way, without compromising any of the key specs of the source (efficiency, purity, and indistinguishability). In this work, we propose a novel dual-mode photonic-crystal waveguide that realizes direct in-plane resonant excitation of the embedded QDs. The device relies on a two-mode waveguide design, which allows exploiting one mode for excitation of the QD and the other mode for collecting the emitted single photons with high efficiency. By proper engineering of the photonic bandstructure, we propose a design with single-photon collection efficiency of beta > 0.95 together with a single-photon impurity of epsilon < 5 x 10(-3) over a broad spectral and spatial range. The device has a compact footprint of similar to 50 mu m(2) and would enable stable and scalable excitation of multiple emitters for multi-photon quantum applications.
AB - A high-quality quantum dot (QD) single-photon source is a key resource for quantum information processing. Exciting a QD emitter resonantly can greatly suppress decoherence processes and lead to highly indistinguishable single-photon generation. It has, however, remained a challenge to implement strict resonant excitation in a stable and scalable way, without compromising any of the key specs of the source (efficiency, purity, and indistinguishability). In this work, we propose a novel dual-mode photonic-crystal waveguide that realizes direct in-plane resonant excitation of the embedded QDs. The device relies on a two-mode waveguide design, which allows exploiting one mode for excitation of the QD and the other mode for collecting the emitted single photons with high efficiency. By proper engineering of the photonic bandstructure, we propose a design with single-photon collection efficiency of beta > 0.95 together with a single-photon impurity of epsilon < 5 x 10(-3) over a broad spectral and spatial range. The device has a compact footprint of similar to 50 mu m(2) and would enable stable and scalable excitation of multiple emitters for multi-photon quantum applications.
KW - quantum dot
KW - single-photon source
KW - resonance fluorescence
KW - photonic crystals
KW - photonic integrated circuits
KW - SINGLE
KW - DESIGN
KW - BAND
U2 - 10.1088/2058-9565/ac5918
DO - 10.1088/2058-9565/ac5918
M3 - Journal article
VL - 7
JO - Quantum Science and Technology
JF - Quantum Science and Technology
SN - 2058-9565
IS - 2
M1 - 025023
ER -
ID: 303444021