Numerical analysis of optical super-resolution in a structure of quasi-Luneburg-sphere

Xiaogang Chen; Qijing Lu; Liang Fu; Xiang Wu; Shusen Xie

doi:10.1117/12.2500161

23 October 2018 Numerical analysis of optical super-resolution in a structure of quasi-Luneburg-sphere

Xiaogang Chen, Qijing Lu, Liang Fu, Xiang Wu, Shusen Xie

Proceedings Volume 10820, Optics in Health Care and Biomedical Optics VIII; 108201C (2018) https://doi.org/10.1117/12.2500161
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

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.

Citation Download Citation

Xiaogang Chen, Qijing Lu, Liang Fu, Xiang Wu, and Shusen Xie "Numerical analysis of optical super-resolution in a structure of quasi-Luneburg-sphere", Proc. SPIE 10820, Optics in Health Care and Biomedical Optics VIII, 108201C (23 October 2018); https://doi.org/10.1117/12.2500161

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