Generating heralded single photons with a switchable orbital angular momentum mode  

作　　者：SHAN ZHANG SHIKANG LI XUE FENG KAIYU CUI FANG LIU WEI ZHANG YIDONG HUANG 

机构地区：[1]Department of Electronic Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Photonics Research》2021年第9期1865-1870,共6页光子学研究（英文版）

基　　金：National Key Research and Development Program of China(2017YFA0303700,2018YFB2200402);National Natural Science Foundation of China(61621064,61875101);Beijing Innovation Center for Future Chip;Frontier Science Center for Quantum Information;Beijing Academy of Quantum Information Sciences;Tsinghua Initiative Scientific Research Program。

摘　　要：The orbital angular momentum(OAM) carried by photons defines an infinitely dimensional discrete Hilbert space. With OAM modes, high-dimensional quantum states can be achieved for quantum communication and cryptography. Here we demonstrate a heralded single-photon source with a switchable OAM mode, which consists of a heralded single-photon source and an integrated OAM emitter as the mode converter. As the first step, the heralded single-photon source is based on the dispersion-shifted fiber. In this work, the OAM mode(quantized by topological charge l) carried by the heralded single photon(at fixed wavelength of 1555.75 nm) can be switched within the range of l=3–7 while the mode purity is more than 80%.

关 键 词：OAM SWITCHED MODE 

分 类 号：TN25[电子电信—物理电子学]