Multichannel optical diode with unidirectional diffraction relevant total transmission
Author
Serebryannikov, A.E.
Cakmak, A.O.
Özbay, Ekmel
Date
2012Source Title
Optics Express
Print ISSN
10944087
Publisher
Optical Society of American (OSA)
Volume
20
Issue
14
Pages
14980 - 14990
Language
English
Type
ArticleItem Usage Stats
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Abstract
We will show that broadband unidirectional optical transmission with a total transmission maximum inside the band can be obtained for linearly polarized incident waves in the nonsymmetric photonic crystal gratings made of isotropic linear materials at a fixed nonzero or zero angle of incidence. Being based on the merging of diffraction and dispersion effects, the basic physical mechanism studied exploits the transmission channels associated with higher orders, for which asymmetry in the coupling conditions at the two grating interfaces appears when spatial inversion symmetry is broken. Total transmission in one direction and zero transmission in the opposite direction can be obtained due to hybridization of Fabry-Perot type resonances with a diffraction anomaly that yields a diode-like operation regime. Single-beam deflection and two-beam splitting can be obtained, for which transmission can be (nearly) total, if the corrugated side is illuminated. In contrast to the previous studies, it is also shown that unidirectional transmission can appear only at a fixed frequency and only due to diffractions, when total transmission occurs at the noncorrugated-side illumination, being in agreement with the Lorentz Lemma. © 2012 Optical Society of America.
Keywords
DiffractionCoupling condition
Dispersion effect
Fabry-Perot
Fixed frequency
Linear materials
Linearly polarized
Lorentz lemma
Multi-channel
Nonsymmetric
Operation regime
Optical diodes
Physical mechanism
Single-beam
Spatial inversion symmetry
Total transmission
Transmission channels
Two beams
Zero angle
Diffraction gratings