Title :
Design and fabrication of dielectric nanostructured Luneburg lens in optical frequencies
Author :
Takahashi, Satoshi ; Chang, Chih-Hao ; Yang, Se Young ; Barbastathis, George
Author_Institution :
Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
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.
Keywords :
electron beam lithography; lenses; nanolithography; nanophotonics; nanostructured materials; optical design techniques; optical fabrication; optical focusing; ray tracing; FDTD; Hamiltonian ray tracing; dielectric subwavelength nanostructured Luneburg lens; electron beam lithography; finite difference time domain method; focusing; optical design; optical fabrication; wavefront error; Adaptive optics; Dielectrics; Fiber optics; Indexes; Lenses; Optical device fabrication;
Conference_Titel :
Optical MEMS and Nanophotonics (OPT MEMS), 2010 International Conference on
Conference_Location :
Sapporo
Print_ISBN :
978-1-4244-8926-8
Electronic_ISBN :
978-1-4244-8925-1
DOI :
10.1109/OMEMS.2010.5672127
