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Heralding single photons from a high-Q silicon microdisk

Published

Author(s)

Xiyuan Lu, Steven Rogers, Thomas Gerrits, Wei Jiang, Sae Woo Nam, Qiang Lin

Abstract

Integrated quantum photonics has recently attracted considerable attention due to the promise of realizing chip-scale quantum information processing with unprecedented capability and complexity. Their implementation relies essentially on a high-quality chip-scale photon source to support diverse quantum functionalities. Microresonator-based photon sources are a promising solution for generating bright, pure, and single-mode photons with excellent power efficiencies. However, their low Klyshko efficiency, typically around a few percentages, is a major bottleneck restricting this type of device from practical quantum applications. In this paper, we improve the Klyshko efficiency of a telecom-band heralded single-photon source from a high-Q silicon microdisk to as high as 48%. We characterize the photon antibunching properties at the same time, with a conditional self-correlation below 0.01 at a detected photon pair flux up to 0.002 counts per 5 ns gate at a repetition rate of 3 MHz. At an optical peak power of 73 μW, the photon source has a large photon flux of 0.01 counts per gate, a high Klyshko efficiency of 46%, and a strong photon antibunching with a conditional self-correlation smaller than 0.05. In particular, we find a relation between the Klyshko efficiency and high-order correlations for the first time to our knowledge. This relation contributes to the understanding of photon statistics in the heralding process and also provides a method to verify the Klyshko efficiency. The improved heralding efficiency, together with the great photon antibunching property and power efficiency, renders the microresonator-based photon source promising for diverse quantum applications, including linear-optical quantum computing and quantum key distribution.
Citation
Optica
Volume
3

Keywords

on-chip single photon source, heralding efficiency, single photon detection

Citation

Lu, X. , Rogers, S. , Gerrits, T. , Jiang, W. , Nam, S. and Lin, Q. (2016), Heralding single photons from a high-Q silicon microdisk, Optica, [online], https://doi.org/10.1364/OPTICA.3.001331 (Accessed April 17, 2024)
Created November 9, 2016, Updated October 12, 2021