A hyperlens-based device for nanoscale focusing of light
Chinese Optics Letters, Vol. 10, Issue 4, pp. 042302- (2012)
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Abstract
To resolve the problem of missed evanescent waves in a beam focusing system, a hyperlens-based beam focusing device is proposed in this letter. This device can convert the evanescent waves into propagating waves, and then a super-resolution spot is formed at the center of the hyperlens. The working principle of the device is presented, and the way in which the material and structural parameters of the hyperlens affect the resolution and transmission is analyzed in detail. A multibeam focusing device is optimally designed, and the simulated results verify that a nanoscale spot with a diameter of 15.6 nm (corresponding to λ0/24, where λ0 is the working wavelength in vacuum) is achieved, which is far less than the diffraction limited resolution with a value of 625 nm (1.7λ0). The device is expected to find numerous applications in optical data storage and nano{photolithography, among others.
© 2012 Chinese Optics Letters
OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(230.0230) Optical devices : Optical devices
(160.3918) Materials : Metamaterials
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
ToC Category:
Optical Devices
Citation
Jiangnan Zhao, Guoxing Zheng, Song Li, Hui Zhou, Yue Ma, Ruiying Zhang, Yan Shi, and Ping'an He, "A hyperlens-based device for nanoscale focusing of light," Chin. Opt. Lett. 10, 042302- (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-4-042302
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