Terahertz nanogap antenna for detection of nano-rods

H. R. Park, M. A. Seo, J. S. Kyoung, J. H. Kang, Q Han Park, O. K. Suwal, S. S. Choi, S. M. Koo, N. K. Park, D. S. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have measured transmission properties of a composite structure consisting of nano-rods on a long (ay=300 micron) nano gap (70 nm) on Au film in broad frequency range of 0.1 THz to 1.0 THz using THz time-domain spectroscopy. The normalized transmittance with no nano-bridge or nano-rod structure in the middle shows a half-wavelength resonance: the resonance frequency is ∼c/(2nay) where n is the index of refraction of the substrate. The nano-size bridge at the center of the nano gap gives changes the resonance characteristics profoundly, because in essence, the length a y now halves. Mostly the same resonance-changing behavior is expected with a nano-rod structure fabricated by Pt-deposition method using a focused ion beam (FIB). This small rod also acts as a bridge dividing the length of the rectangle. The structure dependent resonance allows to detect nano-size particles and to tailor resonance characteristics with feature sizes of λ/10,000.

Original languageEnglish
Title of host publication34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009
DOIs
Publication statusPublished - 2009 Dec 31
Event34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009 - Busan, Korea, Republic of
Duration: 2009 Sep 212009 Sep 25

Other

Other34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009
CountryKorea, Republic of
CityBusan
Period09/9/2109/9/25

Fingerprint

Antennas
Focused ion beams
Composite structures
Refraction
Particle size
Spectroscopy
Wavelength
Substrates
time

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Communication

Cite this

Park, H. R., Seo, M. A., Kyoung, J. S., Kang, J. H., Park, Q. H., Suwal, O. K., ... Kim, D. S. (2009). Terahertz nanogap antenna for detection of nano-rods. In 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009 [5324597] https://doi.org/10.1109/ICIMW.2009.5324597

Terahertz nanogap antenna for detection of nano-rods. / Park, H. R.; Seo, M. A.; Kyoung, J. S.; Kang, J. H.; Park, Q Han; Suwal, O. K.; Choi, S. S.; Koo, S. M.; Park, N. K.; Kim, D. S.

34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009. 2009. 5324597.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Park, HR, Seo, MA, Kyoung, JS, Kang, JH, Park, QH, Suwal, OK, Choi, SS, Koo, SM, Park, NK & Kim, DS 2009, Terahertz nanogap antenna for detection of nano-rods. in 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009., 5324597, 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009, Busan, Korea, Republic of, 09/9/21. https://doi.org/10.1109/ICIMW.2009.5324597
Park HR, Seo MA, Kyoung JS, Kang JH, Park QH, Suwal OK et al. Terahertz nanogap antenna for detection of nano-rods. In 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009. 2009. 5324597 https://doi.org/10.1109/ICIMW.2009.5324597
Park, H. R. ; Seo, M. A. ; Kyoung, J. S. ; Kang, J. H. ; Park, Q Han ; Suwal, O. K. ; Choi, S. S. ; Koo, S. M. ; Park, N. K. ; Kim, D. S. / Terahertz nanogap antenna for detection of nano-rods. 34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009. 2009.
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AU - Seo, M. A.

AU - Kyoung, J. S.

AU - Kang, J. H.

AU - Park, Q Han

AU - Suwal, O. K.

AU - Choi, S. S.

AU - Koo, S. M.

AU - Park, N. K.

AU - Kim, D. S.

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N2 - We have measured transmission properties of a composite structure consisting of nano-rods on a long (ay=300 micron) nano gap (70 nm) on Au film in broad frequency range of 0.1 THz to 1.0 THz using THz time-domain spectroscopy. The normalized transmittance with no nano-bridge or nano-rod structure in the middle shows a half-wavelength resonance: the resonance frequency is ∼c/(2nay) where n is the index of refraction of the substrate. The nano-size bridge at the center of the nano gap gives changes the resonance characteristics profoundly, because in essence, the length a y now halves. Mostly the same resonance-changing behavior is expected with a nano-rod structure fabricated by Pt-deposition method using a focused ion beam (FIB). This small rod also acts as a bridge dividing the length of the rectangle. The structure dependent resonance allows to detect nano-size particles and to tailor resonance characteristics with feature sizes of λ/10,000.

AB - We have measured transmission properties of a composite structure consisting of nano-rods on a long (ay=300 micron) nano gap (70 nm) on Au film in broad frequency range of 0.1 THz to 1.0 THz using THz time-domain spectroscopy. The normalized transmittance with no nano-bridge or nano-rod structure in the middle shows a half-wavelength resonance: the resonance frequency is ∼c/(2nay) where n is the index of refraction of the substrate. The nano-size bridge at the center of the nano gap gives changes the resonance characteristics profoundly, because in essence, the length a y now halves. Mostly the same resonance-changing behavior is expected with a nano-rod structure fabricated by Pt-deposition method using a focused ion beam (FIB). This small rod also acts as a bridge dividing the length of the rectangle. The structure dependent resonance allows to detect nano-size particles and to tailor resonance characteristics with feature sizes of λ/10,000.

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