Competition between linear and nonlinear processes during generation of pulsed terahertz radiation in a ZnTe crystal

Journal Article · Tue May 31 04:00:00 EDT 2005 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2005V035N05ABEH002805· OSTI ID:21470755

Gaivoronsky, Vladimir Ya; Shepelyavyi, Yevgenii V ^[1]; Nazarov, Maksim M; Sapozhnikov, Dmitrii A ^[2]; Shkel'nyuk, Svetlana A; Shkurinov, A P; Shuvaev, Aleksandr V ^[3]

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1. Institute of Physics, National Academy of Sciences of Ukraine, Kiev (Ukraine)
2. International Laser Center, M. V. Lomonosov Moscow State University, Moscow (Russian Federation)
3. Department of Physics, M.V. Lomonosov Moscow State University, Moscow (Russian Federation)

The generation of terahertz (THz) pulses by the optical rectification of femtosecond laser pulses in a ZnTe crystal is studied. A substantial decrease in the THz radiation power was observed upon tight focusing of laser radiation into the crystal. It is shown that the consideration of competing two-photon absorption and second-harmonic generation processes proceeding simultaneously with optical rectification cannot explain this effect even qualitatively. It is assumed that the observed decrease in the THz radiation power is caused by a decrease in the size of a source of nonlinear polarisation. The conditions are found for the most efficient generation of THz radiation in the ZnTe crystal. (nonlinear optical phenomena)

• OSTI ID: 21470755
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 5 Vol. 35; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
BOSONS
CHALCOGENIDES
CRYSTALS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FOCUSING
FREQUENCY MIXING
FREQUENCY RANGE
HARMONIC GENERATION
LASER RADIATION
LASERS
MASSLESS PARTICLES
NONLINEAR PROBLEMS
PHOTONS
POLARIZATION
PULSES
RADIATIONS
SORPTION
TELLURIDES
TELLURIUM COMPOUNDS
THZ RANGE
ZINC COMPOUNDS
ZINC TELLURIDES