High spatial resolution collinear chiral sum-frequency generation microscopy  

作　　者：Ziheng Ji Wentao Yu Dashan Dong Hong Yang Kaihui Liu Yun-Feng Xiao Qihuang Gong Qinghai Song Kebin Shi 

机构地区：[1]Harbin Institute of Technology(Shenzhen),School of Science,Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System,Shenzhen,China [2]Peking University,School of Physics,State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-Optoelectronics,Beijing,China [3]Nanjing University of Science and Technology,Institute of Interdisciplinary Physical Sciences,School of Science,Nanjing,China [4]Shanxi University,Collaborative Innovation Center of Extreme Optics,Taiyuan,China [5]Peking University Yangtze Delta Institute of Optoelectronics,Nantong,China

出　　处：《Advanced Photonics Nexus》2024年第2期42-48,共7页先进光子学通讯（英文）

基　　金：supported by the Guangdong Major Project of Basic and Applied Basic Research (Grant No.2020B0301030009);the National Natural Science Foundation of China (Grant Nos.91750203,91850111,11174019,12004013,92150301,and 61322509);the Ministry of Science and Technology of China[National Basic Research Program of China (Grant No.2013CB921904)];the China Postdoctoral Science Foundation (Grant No.2020M680220).

摘　　要：Chiral sum-frequency generation(SFG)has proven to be a versatile spectroscopic and imaging tool for probing chirality.However,due to polarization restriction,the conventional chiral SFG microscopes have mostly adopted noncollinear beam configurations,which only partially cover the aperture of microscope and strongly spoil the spatial resolution.In this study,we report the first experimental demonstration of collinear chiral SFG microscopy,which fundamentally supports diffraction-limited resolution.This advancement is attributed to the collinear focus of a radially polarized vectorial beam and a linearly polarized(LP)beam.The tightly focused vectorial beam has a very strong longitudinal component,which interacts with the LP beam and produces the chiral SFG.The collinear configuration can utilize the full aperture and thus push the spatial resolution close to the diffraction limit.This technique can potentially boost the understanding of chiral systems.

关 键 词：chiral sum-frequency generation radially polarized beam nonlinear optical microscopy 

分 类 号：O62[理学—有机化学]