Physical mechanisms of terahertz pulse emission from photoexcited surfaces of tellurium crystals
- Center for Physical Sciences and Technology, A. Goštauto 11, 01180 Vilnius (Lithuania)
We report on terahertz (THz) emission from tellurium crystal surfaces excited by femtosecond optical pulses. Measurements were performed on three differently cut Te samples and with different wavelength optical excitation pulses. THz pulse amplitude dependences on the azimuthal angle measured at various excitation wavelengths have evidenced that three different mechanisms are responsible for THz generation in tellurium: second order nonlinear optical rectification effect, dominating at lower excitation photon energies, as well as transverse and ordinary photo-Dember effects, which emerge at energies larger than 0.9 eV. The shapes of the azimuthal angle dependences were also explained by theoretical model.
- OSTI ID:
- 22314367
- Journal Information:
- Journal of Applied Physics, Vol. 116, Issue 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Terahertz radiation from InAs induced by carrier diffusion and drift
Coherent phonon spectroscopy of non-fully symmetric modes using resonant terahertz excitation