Journal article · Preprint article
Unidirectional frequency conversion in microring resonators for on-chip frequency-multiplexed single-photon sources
Department of Photonics Engineering, Technical University of Denmark1
Fiber Optics, Devices and Non-linear Effects, Department of Photonics Engineering, Technical University of Denmark2
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark3
Nanophotonic Devices, Department of Photonics Engineering, Technical University of Denmark4
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark5
Technical University of Denmark6
Microring resonators are attractive for low-power frequency conversion via Bragg-scattering fourwave-mixing due to their comb-like resonance spectrum, which allows resonant enhancement of all four waves while maintaining energy and momentum conservation. However, the symmetry of such mode structures limits the conversion efficiency to 50% due to the equal probability of up- and down-conversion.
Here, we demonstrate how two coupled microrings enable highly directional conversion between the spectral modes of one of the rings. An extinction between up- and down-conversion of more than 40 dB is experimentally observed. Based on this method, we propose a design for on-chip multiplexed single-photon sources that probabilistically generate photon pairs across many frequency modes of a ring resonator and subsequently convert them to a single frequency-thereby enabling quasi-deterministic photon emission.
Our numerical analysis shows that once a photon is generated, it can be converted and emitted into a wave packet having a 90% overlap with a Gaussian with 99% efficiency for a ratio between intrinsic and coupling quality factors of 400.
Language: | English |
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Publisher: | IOP Publishing |
Year: | 2019 |
Pages: | 033037 |
ISSN: | 13672630 |
Types: | Journal article and Preprint article |
DOI: | 10.1088/1367-2630/ab09a7 |
ORCIDs: | Heuck, Mikkel , 0000-0001-6056-4674 , Christensen, Jesper Bjerge , Ding, Yunhong , Frandsen, Lars Hagedorn , Rottwitt, Karsten and Oxenløwe, Leif Katsuo |