Engineering the spectra of photon triplets generated from micro/nanofiber  

作　　者：瞿川 郭东琴 李笑笑 刘振旗 赵义 张胜海 卫正统 Chuan Qu;Dongqin Guo;Xiaoxiao Li;Zhenqi Liu;Yi Zhao;Zhengtong Wei(The College of Basic Department,Information Engineering University,Zhengzhou 450000,China)

机构地区：[1]The College of Basic Department,Information Engineering University,Zhengzhou 450000,China

出　　处：《Chinese Physics B》2024年第3期408-414,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.61605249);the Science and Technology Key Project of Henan Province of China(Grant Nos.182102210577 and 232102211086).

摘　　要：Quantum light sources are the core resources for photonics-based quantum information processing.We investigate the spectral engineering of photon triplets generated by third-order spontaneous parametric down-conversion in micro/nanofiber.The phase mismatching at one-third pump frequency gives rise to non-degenerate photon triplets,the joint spectral intensity of which has an elliptical locus with a fixed eccentricity of√6/3.Therefore,we propose a frequency-division scheme to separate non-degenerate photon triplets into three channels with high heralding efficiency for the first time.Choosing an appropriate pump wavelength can compensate for the fabrication errors of micro/nanofiber and also generate narrowband,non-degenerate photon triplet sources with a high signal-to-noise ratio.Furthermore,the long-period micro/nanofiber grating introduces a new controllable degree of freedom to tailor phase matching,resulting from the periodic oscillation of dispersion.In this scheme,the wavelength of photon triplets can be flexibly tuned using quasi-phase matching.We study the generation of photon triplets from this novel perspective of spectrum engineering,and we believe that this work will accelerate the practical implementation of photon triplets in quantum information processing.

关 键 词：photon triplets micro/nanofiber spectrum engineering 

分 类 号：O431.2[机械工程—光学工程]