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Numerical analysis of optical super-resolution in a structure of quasi-Luneburg-sphere
Author(s): Xiaogang Chen; Qijing Lu; Liang Fu; Xiang Wu; Shusen Xie
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Paper Abstract

Luneburg-sphere (LS) is a spherically symmetric sphere with three-dimensional graded-refractive-index structure which can focus parallel beam to a perfect point on the sphere surface. Recent research shows that microsphere can generate super-resolution focusing beyond diffraction limit. Herein a quasi-Luneburg-lens can be used as an optically transparent microsphere for the super-resolution imaging. In this paper, the finite element model is used to investigate the optical properties of the Luneburg-lens. Our simulation results demonstrated that its focus size is below the conventional diffractive limit in the visible spectrum. An effective method of application of a quasiLuneburg-lens is proposed and discussed. Besides super-resolution imaging, Luneburg-lens have the potential applications in nanolithography, nanomedicine areas as well.

Paper Details

Date Published: 23 October 2018
PDF: 6 pages
Proc. SPIE 10820, Optics in Health Care and Biomedical Optics VIII, 108201C (23 October 2018); doi: 10.1117/12.2500161
Show Author Affiliations
Xiaogang Chen, Fujian Normal Univ. (China)
Qijing Lu, Fujian Normal Univ. (China)
Liang Fu, Fujian Normal Univ. (China)
Xiang Wu, Fudan Univ. (China)
Shusen Xie, Fujian Normal Univ. (China)

Published in SPIE Proceedings Vol. 10820:
Optics in Health Care and Biomedical Optics VIII
Qingming Luo; Xingde Li; Ying Gu; Yuguo Tang, Editor(s)

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