3 papers
cond-mat.mes-hall2023
Nonlinear intensity dependence of ratchet currents induced by terahertz laser radiation in bilayer graphene with asymmetric periodic grating gates
Erwin Mönch, Stefan Hubmann, Ivan Yahniuk +9
We report on the observation of a nonlinear intensity dependence of the terahertz radiation induced ratchet effects in bilayer graphene with asymmetric dual grating gate lateral la…
cond-mat.mes-hall2020
Terahertz photogalvanics in twisted bilayer graphene close to the second magic angle
M. Otteneder, S. Hubmann, X. Lu +6
We report on the observation of photogalvanic effects in twisted bilayer graphene (tBLG) with a twist angle of 0.6°. We show that excitation of tBLG bulk causes a photocurrent, who…
cond-mat.mes-hall2020
Impact ionization induced by terahertz radiation in HgTe quantum wells of critical thickness
S. Hubmann, G. V. Budkin, M. Urban +9
We report on the observation of terahertz (THz) radiation induced band-to-band impact ionization in \HgTe quantum well (QW) structures of critical thickness, which are characterize…