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Design and fabrication of dielectric nanostructured Luneburg lens in optical frequencies

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4 Author(s)
Takahashi, S. ; Massachusetts Inst. of Technol., Cambridge, MA, USA ; Chang, Chih-Hao ; Se Young Yang ; Barbastathis, G.

A dielectric subwavelength Luneburg lens structure was designed using Hamiltonian ray tracing, and fabricated using electron beam lithography. Analysis from Hamiltonian ray tracing was in agreement with finite difference in time domain (FDTD) method with wavefront error between the two methods below λ/8, while an improvement in speed of approximately 100 times was observed. The fabricated Luneburg lens structure was tested with a fiber laser with a wavelength of λ=1.55μm, and proved its capabilities of focusing.

Published in:

Optical MEMS and Nanophotonics (OPT MEMS), 2010 International Conference on

Date of Conference:

9-12 Aug. 2010