Ultrathin entirely flat Umklapp lenses
File(s)
Accepted version
Author(s)
Chaplain, Gregory J
Craster, Richard
Type
Journal Article
Abstract
We design ultra-thin, entirely flat, dielectric lenses using crystal momentum transfer, so-called Umklapp processes, achieving the required wave control for a new mechanism of flat lensing; physically, these lenses take advantage of abrupt changes in the periodicity of a structured line array so there is an overlap between the first Brillouin zone of one medium with the second Brillouin zone of the other. At the interface between regions of different periodicity, surface, array guided waves hybridize into reversed propagating beams directed into the material exterior to the array. This control, and redirection, of waves then enables the device to emulate a Pendry-Veselago lens that is one unit cell in width, with no need for an explicit negative refractive index. Simulations using an array embedded in an idealized slab of silicon nitride (
Si
3
N
4
) in air, operating at visible wavelengths between
420
–
500
THz
demonstrate the effect.
Si
3
N
4
) in air, operating at visible wavelengths between
420
–
500
THz
demonstrate the effect.
Date Issued
2020-04-28
Date Acceptance
2020-03-30
Citation
Physical Review B: Condensed Matter and Materials Physics, 2020, 101 (15), pp.155430 – 1-155430 – 9
ISSN
1098-0121
Publisher
American Physical Society
Start Page
155430 – 1
End Page
155430 – 9
Journal / Book Title
Physical Review B: Condensed Matter and Materials Physics
Volume
101
Issue
15
Copyright Statement
©2020 American Physical Society
Sponsor
The Leverhulme Trust
The Leverhulme Trust
UKRI
Engineering & Physical Science Research Council (E
Commission of the European Communities
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000529070900009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Grant Number
RPG-2016-365
RF-2017-017/9
EP/T002654/1
R100724-101, A/C 86440
863179
Subjects
Science & Technology
Technology
Physical Sciences
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Materials Science
Physics
NEGATIVE REFRACTION
OPTICS
DIFFRACTION
METALENSES
LIGHT
BLOCH
Publication Status
Published
Article Number
ARTN 155430
Date Publish Online
2020-04-28