Ultrasensitive measurement of angular rotations via a Hermite–Gaussian pointer  

作　　者：BINKE XIA JINGZHENG HUANG HONGJING LI MIAOMIAO LIU TAILONG XIAO CHEN FANG GUIHUA ZENG 

机构地区：[1]State Key Laboratory of Advanced Optical Communication Systems and Networks,Institute for Quantum Sensing and Information Processing,Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Photonics Research》2022年第12期2816-2827,共12页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(61631014,61671287,61901258,62071298);State Key Laboratory of Advanced Optical Communication Systems and Networks。

摘　　要：Exploring high sensitivity on the measurement of angular rotations is an outstanding challenge in optics and metrology.In this work,we employ the mn-order Hermite-Gaussian(HG) beam in the weak measurement scheme with an angular rotation interaction,where the rotation information is taken by another HG mode state completely after the post-selection.By taking a projective measurement on the final light beam,the precision of angular rotation is improved by a factor of 2mn+m+n.For verification,we perform an optical experiment where the minimum detectable angular rotation improves √15-fold with HG55 mode over that of HG11 mode,and achieves a sub-microradian scale of the measurement precision.Our theoretical framework and experimental results not only provide a more practical and convenient scheme for ultrasensitive measurement of angular rotations but also contribute to a wide range of applications in quantum metrology.

关 键 词：ROTATION ANGULAR scheme 

分 类 号：TB96[机械工程—光学工程]