|
Xinchao Lu 1*, 2, Li Wang 2, Weili Zhang 1
1 School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese
Academy of Sciences, PO Box 603, Beijing 100190, People's Republic of China
*1 E-mail: xinchao@iphy.ac.cn
 View Full Text: PDF
Abstract: We report an anomalous field enhancement of terahertz transmission in metallic, hybrid plasmonic geometries. The integration of a rectangle particle in the hole not only results in an eight times normalized transmittance compared to that of the hole-only counterpart, but also tailors polarization-dependent transmission discrepancy encountered in arrays of rectangular holes. In addition, plasmonic structures made of metallic rings integrated into the subwavelength holes are investigated. The emergence and the interplay of various resonances sustained by the hybrid plasmonic samples are elucidated. To reveal a coherent physical picture, relevant dimensions of the samples are modified and their impact on the resonance properties is analyzed. The understanding of the interplay of various resonances will foster applications which require plasmonic substrates to exhibit simultaneously resonances at well-defined frequencies and line widths.
Keywords: Terahertz frequencies, Surface plasmons, Enhanced transmission.
Received: 2012-5-29
Published: 2012-6-29
Cite this article:
Xinchao Lu, Li Wang, Weili Zhang. (Invited Paper) Resonant Field Enhancement in Hybrid Plasmonic Geometries[J]. International Journal of Terahertz Science and Technology, 2012, Vol.5, No.2: 87-96. DOI:10.11906/TST.087-096.2012.06.08
URL: http://www.tstnetwork.org/10.11906/TST.087-096.2012.06.08
|
