Monte Carlo investigation of terahertz plasma oscillations in gated ultrathin channel of n-InGaAs

Millithaler, J.-F.; Pousset, J.; Reggiani, L.; Ziade, P.; Marinchio, H.; Varani, L.; Palermo, C.; Mateos, J.; González, T.; Perez, S.; Pardo, D.
October 2009
Applied Physics Letters;10/12/2009, Vol. 95 Issue 15, p152102
Academic Journal
By numerical simulations we investigate the dispersion of the plasma frequency in a gated channel of n-type InGaAs layer of thickness W and submicron length L at T=300 K. In the presence of a source-drain voltage and for a carrier concentrations of 1018 cm-3 the spectra evidences a peaked shape with two main bumps, the former at high frequency corresponding to the three-dimensional plasma frequency and the latter at a low frequency. The frequency value of the latter peak exhibits a dispersion as the inverse of the channel length in agreement with the predictions of gradual channel approximation. At increasing drain voltages the instabilities associated with the presence of Gunn domains are responsible for a suppression of the plasma peak in favor of the onset of a peak in the subterahertz domain associated with transit time effects.


Related Articles

  • Characteristic features of generation of few-cycle pulses in infrared and terahertz spectral ranges upon interaction of two femtosecond pulses of different frequencies in air. Stumpf, S.; Bespalov, V.; Korolev, A.; Kozlov, S. // Optics & Spectroscopy;Nov2010, Vol. 109 Issue 5, p763 

    The results of a theoretical analysis of the generation of broadband radiation in the infrared and terahertz spectral ranges upon the excitation of plasma in air by two femtosecond pulses at the fundamental and second-harmonic frequencies of a Ti-sapphire laser are presented. It is found that...

  • Probability of correct selection from lognormal and convective diffusion models based on the likelihood ratio. Strupczewski, W. G.; Mitosek, H. T.; Kochanek, K.; Singh, V. P.; Weglarczyk, S. // Stochastic Environmental Research & Risk Assessment;Apr2006, Vol. 20 Issue 3, p152 

    The objective of the paper is to show that the use of a discrimination procedure for selecting a flood frequency model without the knowledge of its performance for the considered underlying distributions may lead to erroneous conclusions. The problem considered is one of choosing between...

  • Thermodynamics of the liquid states of Langmuir monolayers. Villalobos, Leslie; López-Álvarez, Yania M.; Pastrana-Ríos, Belinda; López, Gustavo E. // Journal of Chemical Physics;3/8/2005, Vol. 122 Issue 10, p104701 

    The liquid states and the liquid-liquid equilibrium of surfactant molecules forming an interphase between air and water have been considered using Monte Carlo computer simulations. Specifically, the expanded and compressed liquid phases observed for surfactant molecules were characterized as a...

  • Terahertz emission from InAs induced by photo-Dember effect: Hydrodynamic analysis and Monte Carlo simulations. Reklaitis, Antanas // Journal of Applied Physics;Sep2010, Vol. 108 Issue 5, p053102 

    Terahertz emission from InAs excited by the femtosecond optical pulse is investigated. The hydrodynamic model is developed for the simplified analysis of the terahertz emission induced by the photo-Dember effect. The hydrodynamic model predicts that the amplitude of the transient photocurrent is...

  • Terahertz material detection from diffuse surface scattering. Schecklman, Scott; Zurk, Lisa M.; Henry, Samuel; Kniffin, Gabriel P. // Journal of Applied Physics;May2011, Vol. 109 Issue 9, p094902 

    The potential for terahertz (THz) spectroscopy to detect explosives and other materials of interest is complicated by rough surface scattering. Our previous work has demonstrated that by averaging over diffuse observation angles and surfaces, spectral features could be recovered from laboratory...

  • Comparison of Zakharov simulation and open boundary Vlasov simulation of strong Langmuir turbulence. Wang, J.G.; Payne, G.L.; DuBois, D.F.; Rose, H.A. // Physics of Plasmas;Jan1996, Vol. 3 Issue 1, p111 

    Solves both Zakharov equations and Vlasov equations numerically to study the strong Langmuir turbulence developed in a plasma driven by an external pump field oscillating at the plasma frequency. Steady state turbulence in Vlasov simulations; Open boundary conditions; Generation of hot...

  • Density rescaling procedure for Monte Carlo simulations of electron transport. Li, Y. M.; Pitchford, L. C.; Moratz, T. J. // Applied Physics Letters;4/10/1989, Vol. 54 Issue 15, p1403 

    A practical difficulty in Monte Carlo simulations of electron transport occurs when the electron number density changes significantly over the time or length scale of the simulation. In this letter, we present a simple scaling procedure to resolve this difficulty that is easy to implement and...

  • Computer simulation of interlayer water in 2:1 clays. Skipper, N. T.; Refson, K.; McConnell, J. D. C. // Journal of Chemical Physics;6/1/1991, Vol. 94 Issue 11, p7434 

    Monte Carlo computer simulation has been used to study water confined between the layers of 2:1 clay minerals. The model systems are based on natural Mg and Na smectites. The simulation cells contain one clay layer, 64 water molecules and four magnesium or eight sodium interlayer cations. These...

  • Computer simulation study of the validity of scaling and renormalization group theories for two-dimensional star polymers. Bishop, Marvin; Clarke, Julian H. R.; Freire, Juan J. // Journal of Chemical Physics;2/15/1993, Vol. 98 Issue 4, p3452 

    Monte Carlo simulations employing the pivot algorithm have been performed for off-lattice polymer systems in order to investigate the behavior of two-dimensional linear and star polymers. Theoretical predictions for the overall radius of gyration and the end-to-end distance were found to be in...


Read the Article


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

Try another library?
Sign out of this library

Other Topics