Dr. Valentin Yu. Kachorovskii Profile

Dr. Valentin Yu. Kachorovskii

at Ioffe Institute

SPIE Involvement:

Author

Publications (3)

Proceedings Article | 20 August 2020 Poster + Paper

Current-driven optical response of plasmonic crystal: From dissipation to amplification

Ilya Gorbenko, Valentin Kachorovskii, Wojciech Knap

Proceedings Volume 11462, 1146223 (2020) https://doi.org/10.1117/12.2567626

KEYWORDS: Plasmonics, Terahertz radiation, Crystals, Plasma, Plasmons, Field effect transistors, Sensors, Physics, Modulation

Read Abstract +

Proceedings Article | 20 August 2020 Poster + Paper

Helicity-sensitive detection of terahertz radiation enhanced by plasmons

Ilya Gorbenko, Valentin Kachorovskii, Michael Shur

Proceedings Volume 11499, 1149914 (2020) https://doi.org/10.1117/12.2567622

KEYWORDS: Terahertz radiation, Phase shifts, Plasma, Plasmonics, Antennas, Sensors, Plasmons, Millimeter wave sensors, Transistors

Read Abstract +

Proceedings Article | 8 June 2017 Presentation

Detection of terahertz radiation in metamaterials: giant plasmonic ratchet effect (Conference Presentation)

Sergey Rudin, Greg Rupper, Valentin Kachorovski, Michael Shur

Proceedings Volume 10227, 102270Y (2017) https://doi.org/10.1117/12.2265713

KEYWORDS: Terahertz radiation, Metamaterials, Plasmonics, Electromagnetic radiation, Modulation, Phase shifts, Polarization, Millimeter wave sensors, Liquids, Numerical simulations

Read Abstract +

The electromagnetic wave impinging on the spatially modulated two-dimensional electron liquid (2DEL) induces a direct current (DC) when the wave amplitude modulated with the same wave vector as the 2DEL but is shifted in phase (the ratchet effect). The recent theory of this phenomenon predicted a dramatic enhancement at the plasmonic resonances and a non-trivial polarization dependence [1]. We will present the results of the numerical simulations using a hydrodynamic model exploring the helicity dependence of the DC current for silicon, InGaAs, and GaN metamaterial structures at cryogenic and room temperatures. In particular we will report on the effect of the DEL viscosity and explore the nonlinear effects at large amplitudes of the helical electromagnetic radiation impinging on the ratchet structures. We will then discuss the applications of the ratchet effect for terahertz metamaterials in order to realize ultra-sensitive terahertz (THz) radiation detectors, modulators, phase shifters, and delay lines with cross sections matching the terahertz wavelength and capable of determining the electromagnetic wave polarization and helicity. To this end, we propose and analyze the four contact ratchet devices capable of registering the two perpendicular components of the electric currents induced by the elliptically or circularly polarized radiation and analyze the load impedance effects in the structures optimized for the ratchet metamaterial THz components. The analysis is based on the hydrodynamic model suitable for the multi-gated semiconductor structures, coupled self-consistently with Poisson’s equation for the electric potential. The model accounts for the effects of pressure gradients and 2DEL viscosity. Our numerical solutions are applicable to the wide ranges of electron mobility and terahertz power. [1] I. V. Rozhansky, V. Yu. Kachorovskii, and M. S. Shur, Helicity-Driven Ratchet Effect Enhanced by Plasmons, Phys. Rev. Lett. 114, 246601, 15 June 2015

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years