High-energy terahertz pulses from semiconductors pumped beyond the three-photon absorption edge

Gy Polónyi, B. Monoszlai, G. Gäumann, E. J. Rohwer, G. Andriukaitis, T. Balciunas, A. Pugzlys, A. Baltuska, T. Feurer, J. Hebling, J. Fülöp

Research output: Contribution to journalArticle

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Abstract

A new route to efficient generation of THz pulses with high-energy was demonstrated using semiconductor materials pumped at an infrared wavelength sufficiently long to suppress both two- and three-photon absorption and associated free-carrier absorption at THz frequencies. For pumping beyond the three-photon absorption edge, the THz generation efficiency for optical rectification of femtosecond laser pulses with tilted intensity front in ZnTe was shown to increase 3.5 times, as compared to pumping below the absorption edge. The four-photon absorption coefficient of ZnTe was estimated to be β4=(4±1)×10-5 cm5/GW3. THz pulses with 14 μJ energy were generated with as high as 0.7% efficiency in ZnTe pumped at 1.7 μm. It is shown that scaling the THz pulse energy to the mJ level by increasing the pump spot size and pump pulse energy is feasible.

Original languageEnglish
Pages (from-to)23872-23882
Number of pages11
JournalOptics Express
Volume24
Issue number21
DOIs
Publication statusPublished - Oct 17 2016

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photons
pulses
pumping
energy
pumps
rectification
absorptivity
routes
scaling
wavelengths
lasers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Polónyi, G., Monoszlai, B., Gäumann, G., Rohwer, E. J., Andriukaitis, G., Balciunas, T., ... Fülöp, J. (2016). High-energy terahertz pulses from semiconductors pumped beyond the three-photon absorption edge. Optics Express, 24(21), 23872-23882. https://doi.org/10.1364/OE.24.023872

High-energy terahertz pulses from semiconductors pumped beyond the three-photon absorption edge. / Polónyi, Gy; Monoszlai, B.; Gäumann, G.; Rohwer, E. J.; Andriukaitis, G.; Balciunas, T.; Pugzlys, A.; Baltuska, A.; Feurer, T.; Hebling, J.; Fülöp, J.

In: Optics Express, Vol. 24, No. 21, 17.10.2016, p. 23872-23882.

Research output: Contribution to journalArticle

Polónyi, G, Monoszlai, B, Gäumann, G, Rohwer, EJ, Andriukaitis, G, Balciunas, T, Pugzlys, A, Baltuska, A, Feurer, T, Hebling, J & Fülöp, J 2016, 'High-energy terahertz pulses from semiconductors pumped beyond the three-photon absorption edge', Optics Express, vol. 24, no. 21, pp. 23872-23882. https://doi.org/10.1364/OE.24.023872
Polónyi G, Monoszlai B, Gäumann G, Rohwer EJ, Andriukaitis G, Balciunas T et al. High-energy terahertz pulses from semiconductors pumped beyond the three-photon absorption edge. Optics Express. 2016 Oct 17;24(21):23872-23882. https://doi.org/10.1364/OE.24.023872
Polónyi, Gy ; Monoszlai, B. ; Gäumann, G. ; Rohwer, E. J. ; Andriukaitis, G. ; Balciunas, T. ; Pugzlys, A. ; Baltuska, A. ; Feurer, T. ; Hebling, J. ; Fülöp, J. / High-energy terahertz pulses from semiconductors pumped beyond the three-photon absorption edge. In: Optics Express. 2016 ; Vol. 24, No. 21. pp. 23872-23882.
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