Telecom-to-Visible Quantum Frequency Converter on a Silicon Nitride Chip
- URL: http://arxiv.org/abs/2505.10338v1
- Date: Thu, 15 May 2025 14:27:04 GMT
- Title: Telecom-to-Visible Quantum Frequency Converter on a Silicon Nitride Chip
- Authors: Sidarth Raghunathan, Richard Oliver, Yun Zhao, Karl McNulty, Chaitali Joshi, Michal Lipson, Alexander L. Gaeta,
- Abstract summary: We present the first quantum frequency converter connecting visible and telecom domains on a silicon nitride (SiN) chip.<n>We use Bragg-scattering four-wave mixing to upconvert heralded single photons from 1260 to 698 nm, which covers a 192 THz span.<n>Our results pave the way for the implementation of CMOS-compatible devices in quantum networks.
- Score: 38.43507093480483
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum frequency conversion serves a key role in the realization of hybrid quantum networks by interfacing between wavelength-incompatible platforms. Here we present the first quantum frequency converter connecting visible and telecom domains on a silicon nitride (SiN) chip, using Bragg-scattering four-wave mixing to upconvert heralded single photons from 1260 to 698 nm, which covers a 192 THz span. We examine the noise sources in SiN and devise approaches to suppress noise photons at the source and target frequencies to enable measurements at the single-photon level. We demonstrate an on-chip conversion efficiency of 5% in photon flux and describe design modifications that can be implemented to significantly improve it. Our results pave the way for the implementation of CMOS-compatible devices in quantum networks.
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