Plasmonic Beam Deflector and Optical Coupler

A new beam deflector and optical coupler structure based on plasmonic nano-slits is proposed and numerically investigated. The structure consists of periodic nano-slits array with the same width and interval. All nano-slits are etched on a silver film whose dimension D is 7 μm (The transverse span o...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 29; no. 18; pp. 1592 - 1595
Main Authors Wu, Wenjun, Yang, Junbo, Chen, Dingbo
Format Journal Article
LanguageEnglish
Published New York IEEE 15.09.2017
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Couplers
Deflection
Etching
gratings
integrated optics devices
Nanostructure
nanostructures
Optical communication
Optical coupling
Optical films
Optical reflection
Optical refraction
Optical variables control
Refractivity
Slits
Surface plasmonics
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Summary:A new beam deflector and optical coupler structure based on plasmonic nano-slits is proposed and numerically investigated. The structure consists of periodic nano-slits array with the same width and interval. All nano-slits are etched on a silver film whose dimension D is 7 μm (The transverse span of the structure). Arbitrary deflection angle can be selected for reflected light by adjusting the size of the nano-slits, the effective refractive index, and the interval of the nano-slits. This structure also can act as an optical coupler by placing a medium on the top of the nano-slits array with specific size and refractive index. The coupling efficiency can approach to 80.73%, and it provides a promising way to design and manufacture future compact optical communication device.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2017.2737779