Robust integration of nitrogen-vacancy centers in nanodiamonds to optical fiber and its application in all-optical thermometry  

作　　者：Ce Bian Minxuan Li Wei Cao Manli Hu Zhiqin Chu Ruohui Wang 边策;李敏轩;曹蔚;忽满利;褚智勤;王若晖(School of Physics,Northwest University,Xi’an 710127,China;Department of Electrical and Electronic Engineering,Joint Appointment with School of Biomedical Sciences,The University of Hong Kong,Hong Kong,China)

机构地区：[1]School of Physics,Northwest University,Xi’an 710127,China [2]Department of Electrical and Electronic Engineering,Joint Appointment with School of Biomedical Sciences,The University of Hong Kong,Hong Kong,China

出　　处：《Chinese Optics Letters》2021年第12期6-10,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.62075181);financial support from the HKU Start-Up Grant and the Seed Fund(No.202011159019)。

摘　　要：In this Letter,we developed a robust method for integrating nanodiamonds(NDs)to optical fiber.The NDs,containing nitrogen-vacancy(NV)centers,were uniformly mixed with UV adhesive before coating the end surface of a multimode fiber as a hemispherical film.The excitation and collection efficiency of NV fluorescence can be enhanced by increasing the thickness of UV adhesive film and additional aluminum film deposition.The fiber-based quantum sensor was also experimentally demonstrated for all-optical thermometry application.The variation of the refractive index of UV adhesive under different temperatures will also affect the NV collection efficiency by changing the light confinement.The demonstrated facile integration approach paves the way for developing fiber-based quantum thermometry and magnetometry.

关 键 词：fiber optics sensors fiber optics quantum optics 

分 类 号：TQ163[化学工程—高温制品工业] TP212[自动化与计算机技术—检测技术与自动化装置]