skip to main content

Title: Indication of Te segregation in laser-irradiated ZnTe observed by in situ coherent-phonon spectroscopy

We irradiate a ZnTe single crystal with 10-fs laser pulses at a repetition rate of 80 MHz and investigate its resulting gradual modification by means of coherent-phonon spectroscopy. We observe the emergence of a phonon mode at about 3.6 THz whose amplitude and lifetime grow monotonously with irradiation time. The speed of this process depends sensitively on the pump-pulse duration. Our observations strongly indicate that the emerging phonon mode arises from a Te phase induced by multiphoton absorption of incident laser pulses. A potential application of our findings is laser-machining of microstructures in the bulk of a ZnTe crystal, a highly relevant electrooptic material.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ; ;  [1]
  1. Fritz Haber Institute of the Max Planck Society, Faradayweg 4-6, 14195 Berlin (Germany)
  2. (Japan)
  3. (United States)
  4. Department of Physics, Free University of Berlin, Arnimallee 14, 14195 Berlin (Germany)
Publication Date:
OSTI Identifier:
22303508
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; AMPLITUDES; IRRADIATION; LASER BEAM MACHINING; LASER RADIATION; LIFETIME; MICROSTRUCTURE; MODIFICATIONS; MONOCRYSTALS; MULTI-PHOTON PROCESSES; PHONONS; SEGREGATION; SPECTROSCOPY; ZINC TELLURIDES