Abstract
Here we propose a multi-scaled reflective grating with excellent blazed performance (nearly perfect blazed effect at the well-predicted frequency and orientation). The blazed grating consists of a periodical array of metallic super-cells, each made of several equal-distant subwavelength slits with linearly reduced depth. A simple model based on Huygens-Fresnel principle is established to forecast the microwave response for the incidence of different polarizations: for transverse-electric polarization, the structure provides only the ordinary total reflection (i.e., without orientation deflected); for transverse-magnetic (TM) polarization, the waves are deflected to specific orientation due to the linear phase delay of the slit exits. Similar design route can be extended to acoustic systems, considering the mathematic similarity between the acoustic wave and the electromagnetic wave of TM-polarization.
Original language | English |
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Article number | 083106 |
Journal | Journal of Applied Physics |
Volume | 118 |
Issue number | 8 |
DOIs | |
State | Published - 28 Aug 2015 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2015 AIP Publishing LLC.
Funding
Funders | Funder number |
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National Natural Science Foundation of China | 11174225, J1210061, 11374233, 11004155 |