Observation of crossover from intraband to interband nonlinear terahertz optics

X Chai, X Ropagnol, A Ovchinnikov, O Chefonov… - Optics Letters, 2018 - opg.optica.org
In this Letter, we investigate the nonlinear effects of extremely intense few-cycle terahertz
(THz) pulses (generated from the organic crystal 4-NN, NN-dimethylamino-4^′ 4^′-N …

Mono-cycle terahertz pulses from intersubband shift currents in asymmetric semiconductor quantum wells

M Runge, T Kang, K Biermann, K Reimann, M Woerner… - Optica, 2021 - opg.optica.org
Both second-order frequency mixing in nonlinear optical media and photoconductive
antennas have provided terahertz (THz) transients in a wide parameter range. Here, we …

Nonlinear ultrafast modulation of the optical absorption of intense few-cycle terahertz pulses in -doped semiconductors

L Razzari, FH Su, G Sharma, F Blanchard… - Physical Review B …, 2009 - APS
We use an open-aperture Z scan technique to show how intense few-cycle terahertz pulses
can experience a nonlinear bleaching of absorption in an n-doped semiconductor due to …

Time-resolved terahertz spectroscopy of free carrier nonlinear dynamics in semiconductors

G Sharma, L Razzari, FH Su, F Blanchard… - IEEE photonics …, 2010 - ieeexplore.ieee.org
Nonlinear dynamics of free carriers in direct bandgap semiconductors at terahertz (THz)
frequencies is studied using the intense few-cycle source available at the Advanced Laser …

Application of broadband terahertz spectroscopy in semiconductor nonlinear dynamics

IC Ho, XC Zhang - Frontiers of Optoelectronics, 2014 - Springer
Semiconductor nonlinearity in the range of terahertz (THz) frequency has been attracting
considerable attention due to the recent development of high-power semiconductor-based …

Generation of high-field terahertz pulses in an HMQ-TMS organic crystal pumped by an ytterbium laser at 1030 nm

A Rovere, YG Jeong, R Piccoli, SH Lee, SC Lee… - Optics …, 2018 - opg.optica.org
We present the generation of high-peak-electric-field terahertz pulses via collinear optical
rectification in a 2-(4-hydroxy-3-methoxystyryl)-1-methilquinolinium-2, 4, 6 …

Terahertz microscopy assisted by semiconductor nonlinearities

F Blanchard, X Chai, T Tanaka, T Arikawa, T Ozaki… - Optics letters, 2018 - opg.optica.org
Terahertz (THz) imaging is currently based on linear effects, but there is great interest on
how nonlinear effects induced by terahertz radiation could be exploited to provide extra …

High efficiency generation and detection of terahertz pulses using laser pulses at telecommunication wavelengths

A Schneider, M Stillhart, P Günter - Optics express, 2006 - opg.optica.org
We report on the generation and detection of few-cycle THz pulses in the organic crystal
DAST (4-N, N-dimethylamino-4'-N'-methyl stilbazolium tosylate) using the …

Terahertz pulse induced intervalley scattering in photoexcited GaAs

FH Su, F Blanchard, G Sharma, L Razzari… - Optics express, 2009 - opg.optica.org
Nonlinear transient absorption bleaching of intense few-cycle terahertz (THz) pulses is
observed in photoexcited GaAs using opticalpump–THz-probe techniques. A simple model …

Terahertz pulse generation from bulk GaAs by a tilted-pulse-front excitation at 1.8 μm

F Blanchard, BE Schmidt, X Ropagnol, N Thiré… - Applied Physics …, 2014 - pubs.aip.org
We report on terahertz (THz) generation via optical rectification in a room temperature
gallium arsenide (GaAs) crystal pumped at a wavelength of 1.8 μm using a modified tilted …