Spectrally multiplexed indistinguishable single-photon generation at telecom-band  

作　　者：HAO YU CHENZHI YUAN RUIMING ZHANG ZICHANG ZHANG HAO LI YOU WANG GUANGWEI DENG LIXING YOU HAIZHI SONG ZHIMING WANG GUANG-CAN GUO QIANG ZHOU 

机构地区：[1]Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,China [2]Institut national de la recherche scientifique-CentreÉnergie,Matériaux et Télécommunications(INRS-EMT),Varennes,Quebec J3X 1S2,Canada [3]Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China [4]Southwest Institute of Technical Physics,Chengdu 610041,China [5]Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China [6]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [7]School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China

出　　处：《Photonics Research》2022年第6期1417-1429,共13页光子学研究（英文版）

基　　金：Sichuan Province Science and Technology Support Program(2018JY0084);National Key Research and Development Program of China(2017YFA0304000,2017YFB0405100,2018YFA0306102,2018YFA0307400,2019YFB2203400);National Natural Science Foundation of China(12074058,61405030,61704164,61775025,62005039,62075034,91836102,U19A2076)。

摘　　要：Heralded single-photon source(HSPS)intrinsically suffers from the trade-off between the heralded single-photon rate and the single-photon purity.To break through this trade-off,one can apply multiplexing technology in different degrees of freedom that significantly improves the performance of the HSPS.Here,we propose a 1.5μm chip-scale HSPS on lithium niobate on insulator by employing spectral multiplexing and active feedforward spectral manipulating,and we demonstrate a proof-of-principle experiment with discrete fiber-based components.With continuous-wave laser pumping and three spectral modes multiplexed,our experimental results show that the spectral multiplexing improves the heralded single-photon rate by near threefold while keeping the g^((2))(0)as low as 0.0006±0.0001 at a measured single-photon rate of 3.1 kHz.By measuring the joint spectral intensity,we show that the spectral multiplexing and feed-forward control effectively erase the frequency correlation of photon pairs.Moreover,we implement the Hong-Ou-Mandel interference between the spectrally multiplexed single photons and photons from an independent weak coherence source,which indicates that the multiplexed single photons are highly indistinguishable after the spectral manipulation.Our results pave a way for on-chip scalable and high-performance HSPS with spectral multiplexing toward deterministic single-photon emission.

关 键 词：PHOTON PROOF PURITY 

分 类 号：O431.2[机械工程—光学工程]