Spectral control of nonclassical light pulses using an integrated thin-film lithium niobate modulator  

作　　者：Di Zhu Changchen Chen Mengjie Yu Linbo Shao Yaowen Hu CJXin Matthew Yeh Soumya Ghosh Lingyan He Christian Reimer Neil Sinclair Franco N.C.Wong Mian Zhang Marko Loncar 

机构地区：[1]John A.Paulson School of Engineering and Applied Sciences,Harvard University,Cambridge,MA 02138,USA [2]Institute of Materials Research and Engineering,Agency for Science,Technology and Research(A*STAR),Singapore 138634,Singapore [3]Research Laboratory of Electronics,Massachusetts Institute of Technology,Cambridge,MA 02139,USA [4]HyperLight Corporation,1 Bow Street,Suite 420,Cambridge,MA 02139,USA [5]Division of Physics,Mathematics and Astronomy,and Alliance for Quantum Technologies(AQT),California Institute of Technology,Pasadena,CA 91125,USA

出　　处：《Light(Science & Applications)》2022年第12期2922-2930,共9页光（科学与应用)（英文版）

基　　金：supported by Harvard Quantum Initiative(HQI),ARO/DARPA(W911NF2010248),AFOSR(FA9550-20-1-01015),DARPA LUMOS(HR0011-20-C-0137),DOE(DE-SC0020376),NSF(EEC-1941583,ECCS-1839197),and AFRL(FA9550-21-1-0056);support by HQI post-doctoral fellowship and A*STAR SERC Central Research Fund(CRF);support by the AQT Intelligent Quantum Networks and Technologies(INQNET)research program.

摘　　要：Manipulating the frequency and bandwidth of nonclassical light is essential for implementing frequency-encoded/multiplexed quantum computation,communication,and networking protocols,and for bridging spectral mismatch among various quantum systems.However,quantum spectral control requires a strong nonlinearity mediated by light,microwave,or acoustics,which is challenging to realize with high efficiency,low noise,and on an integrated chip.Here,we demonstrate both frequency shifting and bandwidth compression of heralded single-photon pulses using an integrated thin-film lithium niobate(TFLN)phase modulator.We achieve record-high electro-optic frequency shearing of telecom single photons over terahertz range(±641 GHz or±5.2 nm),enabling high visibility quantum interference between frequency-nondegenerate photon pairs.We further operate the modulator as a time lens and demonstrate over eighteen-fold(6.55 nm to 0.35 nm)bandwidth compression of single photons.Our results showcase the viability and promise of on-chip quantum spectral control for scalable photonic quantum information processing.

关 键 词：QUANTUM LITHIUM FILM 

分 类 号：O43[机械工程—光学工程]