Influence of plasmons on terahertz conductivity measurements

Han-Kwang Nienhuys; Sundström, Villy
July 2005
Applied Physics Letters;7/4/2005, Vol. 87 Issue 1, p012101
Academic Journal
Time-domain terahertz spectroscopy allows measuring the complex conductivity spectrum of materials at frequencies on the order of 1 THz. Typically, terahertz (THz) studies produce conductivity spectra that are different from those predicted by the classical Drude model, especially in nanostructured materials. We claim that plasmon resonances in particles that are small compared to the THz wavelength cause these deviations. This is supported by measurements on photoexcited silicon, in bulk as well as in micron-sized particles. In the latter, the behavior is vastly different and strongly dependent on charge carrier concentration.


Related Articles

  • Synthesis of new hetarylazoindole dyes from some 2-aminothiazole derivatives. Saylam, A.; Seferoglu, Z.; Ertan, N. // Russian Journal of Organic Chemistry;Apr2008, Vol. 44 Issue 4, p587 

    A new series of heterocyclic disperse dyes were prepared by diazotization of some 2-aminothiazole derivatives and subsequent coupling with indole compounds. The dyes were characterized by UV-Vis, FT-IR, 1H NMR, and mass spectra (LC-MS). Solvent effects on their visible absorption spectra were...

  • The effect of plasmonic particles on solar absorption in vertically aligned silicon nanowire arrays. Chenxi Lin; Povinelli, Michelle L. // Applied Physics Letters;8/16/2010, Vol. 97 Issue 7, p071110 

    In this paper, we used the finite-difference time domain method to determine whether metallic caps provide plasmonic enhancement of absorption in vertically aligned silicon nanowire arrays. Metallic caps result naturally from the vapor-liquid-solid growth process, which uses metal catalyst...

  • Introduction to TES Physics. B. Cabrera // Journal of Low Temperature Physics;Apr2008, Vol. 151 Issue 1/2, p82 

    Abstract  Superconducting Transition Edge sensors (TES) devices are now in use across a broad range of applications including dark matter searches, gamma ray and x-ray spectroscopy, UV-optical-IR spectroscopy, IR bolometry and CMB bolometers. We summarize the effects that must be...

  • Optical Properties and Electronic Structure of PdO. Sobolev, V. Val.; Mordas, D. O.; Sobolev, V. V. // Inorganic Materials;Feb2004, Vol. 40 Issue 2, p166 

    The complete set of optical spectra is calculated for the first time for crystalline PdO in the range 2–5.5 eV for the E ⊥ c and E || c polarizations using experimental dielectric permittivity data. The main features of the spectra are discussed. The origin of the strongest peaks in...

  • Crystal Structure of a Human Single Domain Antibody Dimer Formed through VH-VH Non-Covalent Interactions. Baral, Toya Nath; Chao, Shi-Yu; Li, Shenghua; Tanha, Jamshid; Arbabi-Ghahroudi, Mehdi; Jianbing Zhang; Shuying Wang // PLoS ONE;Jan2012, Vol. 7 Issue 1, p1 

    Single-domain antibodies (sdAbs) derived from human VH are considered to be less soluble and prone to aggregate which makes it difficult to determine the crystal structures. In this study, we isolated and characterized two anti-human epidermal growth factor receptor-2 (HER2) sdAbs, Gr3 and Gr6,...

  • Absorption of surface plasmons in a metal-cladding layer-air structure in the terahertz frequency range. Zhizhin, G. N.; Nikitin, A. K.; Bogomolov, G. D.; Zavialov, V. V.; Jeong Young Uk; Cheol, Lee Byung; Seong Hee Park; Hyuk Jin Cha // Optics & Spectroscopy;May2006, Vol. 100 Issue 5, p734 

    The effect of a thin dielectric cladding layer of a metal on the absorption of surface plasmons (SPs) in the terahertz frequency range is studied experimentally and numerically. It is found that, as the radiation wavelength increases, the attenuation of SPs caused by the cladding layer can...

  • Surface plasmon resonance sensor with a magneto-optical structure. PIŠTORA, JAROMÍR; LESŇÁK, MICHAL; VLAŠÍN, ONDŘEJ; CADA, MICHAL // Optica Applicata;2010, Vol. 40 Issue 4, p883 

    Due to resonant excitation of surface plasmons, surface plasmon resonance (SPR) sensors combined with ferromagnetic thin films allow an enhancement of the magneto-optical (MO) response. MO-SPR structures with Au/Co/Au sandwiches are theoretically analyzed in transverse configuration by 4x4...

  • Coherent longitudinal optical phonon and plasmon coupling in the near-surface region of InN. Chang, Y.-M.; Chuang, C. T.; Chia, C. T.; Tsen, K. T.; Lu, H.; Schaff, W. J. // Applied Physics Letters;11/29/2004, Vol. 85 Issue 22, p5224 

    Coherent phonon spectroscopy of a high-quality InN epitaxial layer is carried out using time-resolved second-harmonic generation. A coherent longitudinal optical phonon and plasmon coupling mode only at 447 cm-1 can be resolved in the spectrum. Its frequency shows no dependence on the...

  • Coupling of surface plasmons between two silver films in a Ag/SiO2/Ag plasmonic thermal emitter with grating structure. Ye, Yi-Han; Jiang, Yu-Wei; Tsai, Ming-Wei; Chang, Yi-Tsung; Chen, Chia-Yi; Tzuang, Dah-Ching; Wu, Yi-Ting; Lee, Si-Chen // Applied Physics Letters;12/29/2008, Vol. 93 Issue 26, p263106 

    The reflection and emission spectra of Ag/SiO2/Ag trilayer plasmonic thermal emitters with different SiO2 thicknesses are investigated. The top Ag film is perforated with periodic slits. It is found that the coupling of surface plasmons at the top and bottom Ag/SiO2 interface results in the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics