Invention Grant
- Patent Title: Methods and apparatus for broadband angular selectivity of electromagnetic waves
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Application No.: US14630080Application Date: 2015-02-24
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Publication No.: US10073191B2Publication Date: 2018-09-11
- Inventor: Yichen Shen , Dexin Ye , Ivan Celanovic , Steven G. Johnson , John D. Joannopoulos , Marin Soljacic
- Applicant: Massachusetts Institute of Technology
- Applicant Address: US MA Cambridge
- Assignee: Massachusetts Institute of Technology
- Current Assignee: Massachusetts Institute of Technology
- Current Assignee Address: US MA Cambridge
- Agency: Smith Baluch LLP
- Main IPC: G02B1/00
- IPC: G02B1/00 ; G02B5/30 ; G02B5/26 ; G02F1/01 ; G02B5/20

Abstract:
A filter to transmit incident radiation at a predetermined incidence angle includes a plurality of photonic crystal structures disposed substantially along a surface normal direction of the filter. The photonic crystal structure includes a multilayer cell that comprises a first layer having a first dielectric permittivity, and a second layer having a second dielectric permittivity different from the first dielectric permittivity. The first layer and the second layer define a Brewster angle substantially equal to the predetermined incidence angle based on the first dielectric permittivity and the second permittivity. Each photonic crystal structure in the plurality of photonic crystal structures defines a respective bandgap, and the respective bandgaps of the plurality of photonic crystal structures, taken together, cover a continuous spectral region of about 50 nm to about 100 mm.
Public/Granted literature
- US20160252652A1 METHODS AND APPARATUS FOR BROADBAND ANGULAR SELECTIVITY OF ELECTROMAGNETIC WAVES Public/Granted day:2016-09-01
Information query
IPC分类:
G | 物理 |
G02 | 光学 |
G02B | 光学元件、系统或仪器 |
G02B1/00 | 按制造材料区分的光学元件;用于光学元件的光学涂层 |