Strong confinement-induced nonlinear terahertz response in semiconductor nanostructures revealed by Monte Carlo calculations

0548915 - FZÚ 2022 RIV US eng J - Článek v odborném periodiku
Kuchařík, Jiří - Němec, Hynek
Strong confinement-induced nonlinear terahertz response in semiconductor nanostructures revealed by Monte Carlo calculations.
Physical Review B. Roč. 103, č. 20 (2021), č. článku 205426. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GX19-28375X
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: terahertz spectroscopy * semiconductor nanostructures * nonlinear optical properties
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 3.908, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevB.103.205426

Nonlinear terahertz conductivity spectra of charges confined in semiconductor nanostructures were calculated using a semiclassical Monte Carlo method. The confinement-induced nonlinear response per charge carrier is much stronger than the intrinsic nonlinearity of common bulk semiconductors and more than 20 times stronger than in graphene, which has been considered as a material with one of the highest terahertz nonlinearities. Moderate intensities of the terahertz radiation are thus sufficient to achieve efficient frequency mixing or high-harmonics generation. Enclosing the nanostructures into metallic nanoslits concentrates the electric field into the semiconductor and thus easily provides nonlinear terahertz signal strength comparable to the linear one.
Trvalý link: http://hdl.handle.net/11104/0324984