Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Shahbazyan, T. V."'
Autor:
Petrosyan, L. S., Shahbazyan, T. V.
Publikováno v:
Phys. Rev. B 96, 075423 (2017)
We study the effect of off-resonant plasmon modes on spaser threshold in nanoparticle-based spasers. We develop an analytical semiclassical model and derive spaser threshold condition accounting for gain coupling to higher-order plasmons. We show tha
Externí odkaz:
http://arxiv.org/abs/1702.04761
Autor:
Petrosyan, L. S., Shahbazyan, T. V.
Publikováno v:
Phys. Rev. B 93, 035419 (2016)
We study coherent transport in a system of a periodic linear chain of quantum dots placed between two parallel quantum wires. We show that resonant-tunneling conductance between the wires exhibits a Rabi splitting of the resonance peak as a function
Externí odkaz:
http://arxiv.org/abs/1510.05599
Autor:
Petrosyan, L. S., Shahbazyan, T. V.
Publikováno v:
Phys. Rev. B 92, 115423 (2015)
We study spin-resolved resonant tunneling in a system of two quantum dots sandwiched between doped quantum wells. In the coherent (Dicke) regime, i.e., when quantum dot separation is smaller than the Fermi wavelength in a two-dimensional electron gas
Externí odkaz:
http://arxiv.org/abs/1506.08214
Autor:
Petrosyan, L. S., Shahbazyan, T. V.
Publikováno v:
Phys. Rev. B. 91, 045405 (2015)
We study resonant tunneling through a periodic square array of quantum dots sandwiched between modulation-doped quantum wells. If a magnetic field is applied parallel to the quantum dot plane, the tunneling current exhibits a highly complex Aharonov-
Externí odkaz:
http://arxiv.org/abs/1410.3558
Publikováno v:
Phys. Rev. Lett. 107, 196802 (2011)
We study electron transmission through a periodic array of quantum dots (QD) sandwiched between doped semiconductor leads. When the Fermi wavelength of tunneling electron exceeds the array lattice constant, the off-resonant per QD conductance is enha
Externí odkaz:
http://arxiv.org/abs/1106.5996
Publikováno v:
Phys. Rev. B 94, 155429 (2016)
The lifetime of localized surface plasmon plays an important role in many aspects of plasmonics and its applications. In small metal nanostructures, the dominant mechanism restricting plasmon lifetime is size-dependent Landau damping. We performed qu
Externí odkaz:
http://arxiv.org/abs/0908.0647
Autor:
Glinka, Y. D., Shahbazyan, T. V., Everitt, H. O., Muth, J. F., Roberts, J., Rajagopal, P., Cook, J., Piner, E., Linthicum, K.
We report on photoluminescence (PL) measurements at 85 K for GaN/AlGaN surface quantum wells (SQW's) with a width in the range of 1.51-2.9 nm. The PL spectra show a redshift with decreasing SQW width, in contrast to the blueshift normally observed fo
Externí odkaz:
http://arxiv.org/abs/0905.1972
We study the ultrafast dynamics of surface electromagnetic waves photogenerated on aluminum film perforated with subwavelength holes array by means of transient photomodulation with 100 fs time resolution. We observed a pronounced blueshift of the re
Externí odkaz:
http://arxiv.org/abs/0808.3595
Publikováno v:
Phys.Rev.B77:125338,2008
We study theoretically the effect of spin-orbit coupling on quantum well excitons in a strong magnetic field. We show that, in the presence of an in-plane field component, the excitonic absorption spectrum develops a double-peak structure due to hybr
Externí odkaz:
http://arxiv.org/abs/0710.3797
Publikováno v:
Phys. Rev. Lett. 100, 056808 (2008)
The ultrafast dynamics of surface electromagnetic waves photogenerated on aluminum film perforated with subwavelength holes array was studied in the visible spectral range by the technique of transient photomodulation with 100 fs time resolution. We
Externí odkaz:
http://arxiv.org/abs/0710.3200