As a potential candidate for quantum computation and metrology,the nitrogen vacancy(NV)center in diamond presents both challenges and opportunities resulting from charge-state conversion.By utilizing different lasers ...As a potential candidate for quantum computation and metrology,the nitrogen vacancy(NV)center in diamond presents both challenges and opportunities resulting from charge-state conversion.By utilizing different lasers for the photon-induced charge-state conversion,we achieved subdiffraction charge-state manipulation.The charge-state depletion(CSD)microscopy resolution was improved to 4.1 nm by optimizing the laser pulse sequences.Subsequently,the electron spin-state dynamics of adjacent NV centers were selectively detected via the CSD.The experimental results demonstrated that the CSD can improve the spatial resolution of the measurement of NV centers for nanoscale sensing and quantum information.展开更多
Forward-scattering-light interferometry has become the most commonly used position detection scheme in optical levitation systems.Usually,three-set detectors are required to obtain the three-dimensional motion informa...Forward-scattering-light interferometry has become the most commonly used position detection scheme in optical levitation systems.Usually,three-set detectors are required to obtain the three-dimensional motion information.Here,we simplify the three-set detectors to one set by inserting a Dove prism.We investigate the role of a Dove prism in the position measurement process with an optical levitation system in vacuum.The relationship between the power spectral density and the rotation angle of a Dove prism is experimentally demonstrated and analyzed.This work shows that the Dove prism can greatly reduce the complexity of the experimental setup,which can be applied to compact optical levitation systems for studies in metrology,quantum physics,and biology.展开更多
基金This study was financially supported by the National Basic Research Program of China(Grant No.2011CB921200)the Knowledge Innovation Project of Chinese Academy of Sciences(Grant No.60921091)+3 种基金the National Natural Science Foundation of China(Grant No.11374290)the Program for New Century Excellent Talents in Universitythe Fundamental Research Funds for the Central Universitiesthe Foundation for the Author of National Excellent Doctoral Dissertation of China.
文摘As a potential candidate for quantum computation and metrology,the nitrogen vacancy(NV)center in diamond presents both challenges and opportunities resulting from charge-state conversion.By utilizing different lasers for the photon-induced charge-state conversion,we achieved subdiffraction charge-state manipulation.The charge-state depletion(CSD)microscopy resolution was improved to 4.1 nm by optimizing the laser pulse sequences.Subsequently,the electron spin-state dynamics of adjacent NV centers were selectively detected via the CSD.The experimental results demonstrated that the CSD can improve the spatial resolution of the measurement of NV centers for nanoscale sensing and quantum information.
基金supported by the Science Challenge Project(No.TZ2018003)the National Natural Science Foundation of China(Nos.61522508 and 91536219)the Anhui Initiative in Quantum Information Technologies(No.AHY130000)
文摘Forward-scattering-light interferometry has become the most commonly used position detection scheme in optical levitation systems.Usually,three-set detectors are required to obtain the three-dimensional motion information.Here,we simplify the three-set detectors to one set by inserting a Dove prism.We investigate the role of a Dove prism in the position measurement process with an optical levitation system in vacuum.The relationship between the power spectral density and the rotation angle of a Dove prism is experimentally demonstrated and analyzed.This work shows that the Dove prism can greatly reduce the complexity of the experimental setup,which can be applied to compact optical levitation systems for studies in metrology,quantum physics,and biology.
