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Updated: Feb 26, 2026
Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
Published on: January 29, 2013
Parameter determination and transformation for the focusing of dielectric microspheres illuminated by optical needle
Tongnan Xia1, Hanming Guo1, Jinbing Hu2
1Engineering Research Center of Optical Instrument and System, Ministry of Education; Shanghai Key Lab of Modern Optical System, College of Optical-Electrical Information and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, 200093, China.
Abstract:
By eliminating the spherical aberrations of microsphere we derived a simple but useful formula on the focusing of dielectric microsphere. On basis of this formula, not only can researchers determine the parameters of an optical microsphere system with super-resolution, but they can also perform parameter transformation. In order to facilitate the application, the principle of parameter transformation was summarized into three kinds of case listed in Table 1, which were all demonstrated numerically with concrete examples by finite-difference time-domain method. This formula will be conducive to the development of applications based on microsphere, such as photonic nano-jet lithography, microsphere nano-scope.
