Terahertz wave enhanced transmission through a single subwavelength aperture with periodic surface structures

Kunihiko Ishihara; Gen Ichi Hatakoshi; Tomofumi Ikari; Hiroaki Minamide; Hiromasa Ito; Keishi Ohashi

doi:10.1143/JJAP.44.L1005

Terahertz wave enhanced transmission through a single subwavelength aperture with periodic surface structures

Kunihiko Ishihara^*, Gen Ichi Hatakoshi, Tomofumi Ikari, Hiroaki Minamide, Hiromasa Ito, Keishi Ohashi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

We demonstrate resonantly enhanced transmission of terahertz (THz) wave radiation (λ ∼ 200μm) through a bull's eye structure (a single subwavelength aperture surrounded by concentric periodic grooves in a metal plate). The phenomenon is caused by the resonant excitation of surface waves, which are known as surface plasmon polaritons in the optical region, generated by the concentric periodic grooves. Strongly enhanced transmission of THz-wave radiation is observed through the single subwavelength circular aperture (diameter d = 100 μm). We also show that introducing the Bragg reflector to the bull's eye structure results in the further increase of the enhanced transmission.

Original language	English
Pages (from-to)	L1005-L1007
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	44
Issue number	28-32
DOIs	https://doi.org/10.1143/JJAP.44.L1005
Publication status	Published - 2005
Externally published	Yes

Keywords

Bragg reflector
Enhanced transmission
Periodic structure
Subwavelength aperture
Surface plasmon polariton
Terahertz wave

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.44.L1005

Cite this

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title = "Terahertz wave enhanced transmission through a single subwavelength aperture with periodic surface structures",

abstract = "We demonstrate resonantly enhanced transmission of terahertz (THz) wave radiation (λ ∼ 200μm) through a bull's eye structure (a single subwavelength aperture surrounded by concentric periodic grooves in a metal plate). The phenomenon is caused by the resonant excitation of surface waves, which are known as surface plasmon polaritons in the optical region, generated by the concentric periodic grooves. Strongly enhanced transmission of THz-wave radiation is observed through the single subwavelength circular aperture (diameter d = 100 μm). We also show that introducing the Bragg reflector to the bull's eye structure results in the further increase of the enhanced transmission.",

keywords = "Bragg reflector, Enhanced transmission, Periodic structure, Subwavelength aperture, Surface plasmon polariton, Terahertz wave",

author = "Kunihiko Ishihara and Hatakoshi, {Gen Ichi} and Tomofumi Ikari and Hiroaki Minamide and Hiromasa Ito and Keishi Ohashi",

year = "2005",

doi = "10.1143/JJAP.44.L1005",

language = "English",

volume = "44",

pages = "L1005--L1007",

journal = "Japanese Journal of Applied Physics, Part 2: Letters",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

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TY - JOUR

T1 - Terahertz wave enhanced transmission through a single subwavelength aperture with periodic surface structures

AU - Ishihara, Kunihiko

AU - Hatakoshi, Gen Ichi

AU - Ikari, Tomofumi

AU - Minamide, Hiroaki

AU - Ito, Hiromasa

AU - Ohashi, Keishi

PY - 2005

Y1 - 2005

N2 - We demonstrate resonantly enhanced transmission of terahertz (THz) wave radiation (λ ∼ 200μm) through a bull's eye structure (a single subwavelength aperture surrounded by concentric periodic grooves in a metal plate). The phenomenon is caused by the resonant excitation of surface waves, which are known as surface plasmon polaritons in the optical region, generated by the concentric periodic grooves. Strongly enhanced transmission of THz-wave radiation is observed through the single subwavelength circular aperture (diameter d = 100 μm). We also show that introducing the Bragg reflector to the bull's eye structure results in the further increase of the enhanced transmission.

AB - We demonstrate resonantly enhanced transmission of terahertz (THz) wave radiation (λ ∼ 200μm) through a bull's eye structure (a single subwavelength aperture surrounded by concentric periodic grooves in a metal plate). The phenomenon is caused by the resonant excitation of surface waves, which are known as surface plasmon polaritons in the optical region, generated by the concentric periodic grooves. Strongly enhanced transmission of THz-wave radiation is observed through the single subwavelength circular aperture (diameter d = 100 μm). We also show that introducing the Bragg reflector to the bull's eye structure results in the further increase of the enhanced transmission.

KW - Bragg reflector

KW - Enhanced transmission

KW - Periodic structure

KW - Subwavelength aperture

KW - Surface plasmon polariton

KW - Terahertz wave

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DO - 10.1143/JJAP.44.L1005

M3 - Article

AN - SCOPUS:30344441118

SN - 0021-4922

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SP - L1005-L1007

JO - Japanese Journal of Applied Physics, Part 2: Letters

JF - Japanese Journal of Applied Physics, Part 2: Letters

IS - 28-32

ER -

Terahertz wave enhanced transmission through a single subwavelength aperture with periodic surface structures

Abstract

Keywords

ASJC Scopus subject areas

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