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

0548915 - FZÚ 2022 RIV US eng J - Journal Article
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
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GX19-28375X
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : terahertz spectroscopy * semiconductor nanostructures * nonlinear optical properties
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 3.908, year: 2021
Method of publishing: Limited access
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.
Permanent Link: http://hdl.handle.net/11104/0324984