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

Shimada, T., Kamaraju, N., Frischkorn, C., Wolf, M., & Kampfrath, T. (2014). Indication of Te segregation in laser-irradiated ZnTe observed by in situ coherent-phonon spectroscopy. Applied Physics Letters, 105(11): 111908. doi:10.1063/1.4896039.

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 Creators:
Shimada, Toru1, 2, Author           
Kamaraju, Natarajan1, 3, Author           
Frischkorn, Christian4, Author
Wolf, Martin1, Author           
Kampfrath, Tobias1, Author           
Affiliations:
1Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              
2Hirosaki University, 1 Bunkyo-cho, Hirosaki, Aomori 036-8152, Japan, ou_persistent22              
3Los Alamos National Laboratory, Center for Integrated Nanotechnologies, Los Alamos, New Mexico 87545, USA, ou_persistent22              
4Department of Physics, Free University of Berlin, Arnimallee 14, 14195 Berlin, Germany , ou_persistent22              

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Free keywords: II-VI semiconductors Phonons Materials fabrication Laser materials Multiphoton absorption
 Abstract: 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.

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Language(s): eng - English
 Dates: 2014-07-112014-09-062014-09-192014-09-15
 Publication Status: Issued
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1063/1.4896039
 Degree: -

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Title: Applied Physics Letters
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 105 (11) Sequence Number: 111908 Start / End Page: - Identifier: Other: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223