THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
发明人:
John S. Y. HO,Ada Shuk Yan POON
申请号：
US15514270
公开号：
US20170250577A1
申请日:
2015.09.28
申请国别(地区):
US
年份:
2017
代理人:
摘要：
A planar immersion lens can include any number of features. A planar immersion lens can be configured to control a phase profile of an incident wave by modulating the incident wave with sub-wavelength structures of varying impedances. The planar immersion lens can also be directly excited, with electronics or other subwavelength sources coupled to the planar immersion lens, to generate a wave with the desired phase profile. The planar immersion lens can include a plurality of metallic elements and passive elements disposed over a substrate. The passive elements can be selected, based on both the intrinsic and mutual impedances of the elements, to shape the spatial phase profile of the incident wave within this phase range. The phase gradient can be introduced along the incident material/refractive material interface to focus the incident wave into the refractive material having wave components at or beyond the critical angle. Methods are also provided.
