Author Affiliations

X. Wei,^1,† Y. Shen,^1,2,† J. C. Jing,^1,† A. S. Hemphill,¹ C. Yang,³ S. Xu,³ Z. Yang,³ and L. V. Wang¹

¹Caltech Optical Imaging Laboratory, Andrew and Peggy Cherng Department of Medical Engineering, Department of Electrical Engineering, California Institute of Technology, 1200 East California Boulevard, Mail Code 138-78, Pasadena, California 91125, USA

²Present address: School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510006, China

³State Key Laboratory of Luminescent Materials and Devices, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, South China University of Technology, Guangzhou 510640, China

^†These authors contributed equally to this work.