Zobrazeno 1 - 10
of 340
pro vyhledávání: '"Uskov, A. V."'
Spontaneous emission, collective phenomena and the efficiency of plasmon-stimulated photo-excitation
Publikováno v:
Photonics and Nanostructures - Fundamentals and Applications 61 (2024) 101297
We find that the spontaneous and collective emissions have a strong influence on the excitation of two-level absorbers (atoms, molecules) interacting in resonance with the plasmonic mode near the metal nanoparticle. The spontaneous and collective emi
Externí odkaz:
http://arxiv.org/abs/2401.09137
Publikováno v:
Ann. Phys. (Berlin) 2024, 2400121
We found that fluctuations in the number of emitters lead to a super-thermal photon statistics of small LEDs in a linear regime, with a strong emitter-field coupling and a bad cavity favorable for collective effects. A simple analytical expression fo
Externí odkaz:
http://arxiv.org/abs/2311.15324
Publikováno v:
the 1 August 2023 issue of Physical Review A (Vol. 108, No. 2)
We investigate the bistability in a small Fabry-Perot interferometer (FPI) with the optical wavelength size cavity, the nonlinear Kerr medium and only a few photons, on average, excited by the external quantum field. Analytical expressions for the st
Externí odkaz:
http://arxiv.org/abs/2304.07530
We consider the small, of the size of the order of the wavelength, interferometer with the main mode excited by a quantum field from a nano-LED or a laser. The input field is detuned from the interferometer mode with, on average, a few photons. We fi
Externí odkaz:
http://arxiv.org/abs/2212.13430
A laser model is formulated in terms of quantum harmonic oscillators. Emitters in the low lasing states are usual harmonic oscillators, and emitters in the upper states are inverted harmonic oscillators. Diffusion coefficients, consistent with the mo
Externí odkaz:
http://arxiv.org/abs/2206.05452
Autor:
Uskov, Alexander V., Smetanin, Igor V., Protsenko, Igor E., Willatzen, Morten, Nikonorov, Nikolay V.
The hot electron generation in plasmonic nanoparticles is the key to efficient plasmonic photocatalysis. In the paper, we study theoretically for the first time the effect of Tamm states (TSs) at the interface metal-semiconductor on hot electron gene
Externí odkaz:
http://arxiv.org/abs/2204.04021
Publikováno v:
Phys. Rev. A, vol. 105, page 053713 (2022)
Nonlinear Heisenberg-Langevin equations are solved analytically by operator Fourier-expansion for the laser in the LED regime. Fluctuations of populations of lasing levels are taken into account as perturbations. Spectra of operator products are calc
Externí odkaz:
http://arxiv.org/abs/2201.02872
Autor:
Uskov, Alexander V., Khurgin, Jacob B., Smetanin, Igor V., Protsenko, Igor E., Nikonorov, Nikolay V.
Landau Damping (LD) mechanism of the Localized Surface Plasmon (LSP) decay is studied for the hybrid nanoplasmonic (metal core/dielectric shell) structures. It is shown that LD in hybrid structures is strongly affected by permittivity and electron ef
Externí odkaz:
http://arxiv.org/abs/2112.06005
Autor:
Protsenko, I. E., Uskov, A. V.
Quantum efficiencies of surface (SPE) and volume (VPE) photo-emissions from metal nanoparticles are calculated by quantum mechanical perturbation theory and compared with each other. Along with discontinuities in the potential barrier and dielectric
Externí odkaz:
http://arxiv.org/abs/2010.14904
Autor:
Agreda, Adrian, Viarbitskaya, Sviatlana, Smetanin, Igor V., Uskov, Alexander V., Francs, Gérard Colas des, Bouhelier, Alexandre
We investigate the influence of a static electric field on the incoherent nonlinear response of an unloaded electrically-contacted nanoscale optical gap antenna. Upon excitation by a tightly focused near-infrared femtosecond laser beam, a transient e
Externí odkaz:
http://arxiv.org/abs/2006.12329