Submegahertz spectral width photon pair source based on fused silica microspheres  

作　　者：ERASTO ORTIZ-RICARDO CESAR BERTONI-OCAMPO MONICA MALDONADO-TERRON ARTURO GARCIA ZURITA ROBERTO RAMIREZ-ALARCON HECTOR CRUZ RAMIREZ R.CASTRO-BELTRAN ALFRED B.U’REN 

机构地区：[1]Instituto de Ciencias Nucleares,Universidad Nacional Autonoma de Mexico,Apartado Postal 70-543,04510 Mexico,D.F.,Mexico [2]Centro de Investigaciones en Optica A.C.,Loma del Bosque 115,Colonia Lomas del Campestre,37150 Leon,Guanajuato,Mexico [3]Departamento de Ingenieria Fisica,Cuerpo Academico de Mecanica Estadistica,Divison de Ciencias e Ingenierias,Universidad de Guanajuato,37150 Leon,Guanajuato,Mexico

出　　处：《Photonics Research》2021年第11期2237-2252,共16页光子学研究（英文版）

基　　金：Consejo Nacional de Ciencia y Tecnologia(1667,293471,293694,376135);Universidad Nacional Autónoma de Mexico(IN104418);Air Force Office of Scientific Research(FA9550-16-1-1458);Universidad de Guanajuato(028/2021)。

摘　　要：High-efficiency submegahertz bandwidth photon pair generators will enable the field of quantum technology to transition from laboratory demonstrations to transformational applications involving information transfer from photons to atoms.While spontaneous parametric processes are able to achieve high-efficiency photon pair generation,the spectral bandwidth tends to be relatively large,as defined by phase-matching constraints.To solve this fundamental limitation,we use an ultrahigh quality factor(Q)fused silica microsphere resonant cavity to form a photon pair generator.We present the full theory for the spontaneous four-wave mixing(SFWM)process in these devices,fully taking into account all relevant source characteristics in our experiments.The exceptionally narrow(down to kilohertz-scale)linewidths of these devices result in a reduction in the bandwidth of the photon pair generation,allowing submegahertz spectral bandwidth to be achieved.Specifically,using a pump source centered around 1550 nm,photon pairs with the signal and idler modes at wavelengths close to 1540 and 1560 nm,respectively,are demonstrated.We herald a single idler-mode photon by detecting the corresponding signal photon,filtered via transmission through a wavelength division multiplexing channel of choice.We demonstrate the extraction of the spectral profile of a single peak in the single-photon frequency comb from a measurement of the signal–idler time of emission distribution.These improvements in device design and experimental methods enabled the narrowest spectral width(Δν=366 k Hz)to date in a heralded single-photon source based on SFWM.

关 键 词：FUSED SILICA SPECTRAL 

分 类 号：O431.2[机械工程—光学工程]