In-plane resonant excitation of quantum dots in a dual-mode
photonic-crystal waveguide with high $\beta$-factor
- URL: http://arxiv.org/abs/2112.00495v1
- Date: Wed, 1 Dec 2021 13:46:13 GMT
- Title: In-plane resonant excitation of quantum dots in a dual-mode
photonic-crystal waveguide with high $\beta$-factor
- Authors: Xiaoyan Zhou, Peter Lodahl, and Leonardo Midolo
- Abstract summary: A high-quality quantum dot (QD) single-photon source is a key resource for quantum information processing.
We propose a novel dual-mode photonic-crystal waveguide that realizes direct in-plane resonant excitation of the embedded QDs.
The device has a compact footprint of $sim 50$ $mu$m$2$ and would enable stable and scalable excitation of multiple emitters for multi-photon quantum applications.
- Score: 0.4588028371034407
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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 $\epsilon< 5 \times 10^{-3}$ over a broad spectral
and spatial range. The device has a compact footprint of $\sim 50$ $\mu$m$^2$
and would enable stable and scalable excitation of multiple emitters for
multi-photon quantum applications.
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