The Anisotropic Thermal Expansion of Non-linear Optical Crystal BaAlBO3F2 Below Room Temperature : сборник научных трудов | Научно-инновационный портал СФУ

The Anisotropic Thermal Expansion of Non-linear Optical Crystal BaAlBO3F2 Below Room Temperature : сборник научных трудов

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.3389/fchem.2018.00252

Ключевые слова: BABF, anisotropic thermal expansion, phonon stimulation, NLO optical property, low temperature

Аннотация: Thermal expansion is a crucial factor for the performance of laser devices, since the induced thermal stress by laser irradiation would strongly affect the optical beam quality. For BaAlBO3F2 (BABF), a good non-linear optical (NLO) crystal, due to the highly anisotropic thermal expansion its practical applications are strongly affected by the "tearing" stress with the presence of local overheating area around the laser spot. Recently, the strategy to place the optical crystals in low-temperature environment to alleviate the influence of the thermal effect has been proposed. In order to understand the prospect of BABF for this application, in this work, we investigated its thermal expansion behavior below room temperature. The variable-temperature XRD showed that the ratio of thermal expansion coefficient between along c- and along a(b)- axis is high as 4.5:1 in BABF. The Raman spectrum combined with first-principles phonon analysis revealed that this high thermal expansion anisotropy mainly ascribe to progressive stimulation of the respective vibration phonon modes related with the thermal expansion along a(b)- and c-axis. The good NLO performance in BABF can be kept below room temperature. The work presented in this paper provides an in-depth sight into the thermal expansion behavior in BABF, which, we believe, would has significant implication to the manipulation in atomic scale on the thermal expansion of the materials adopted in strong-field optical facility.

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Издание

Журнал: FRONTIERS IN CHEMISTRY

Выпуск журнала: Vol. 6

Номера страниц: 252

ISSN журнала: 22962646

Место издания: LAUSANNE

Издатель: FRONTIERS MEDIA SA

Авторы

  • Jiang Xingxing (Chinese Acad Sci, Tech Inst Phys & Chem, Beijing, Peoples R China)
  • Wang Naizheng (Chinese Acad Sci, Tech Inst Phys & Chem, Beijing, Peoples R China; Univ Chinese Acad Sci, Beijing, Peoples R China)
  • Molokeev Maxim S. (Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Lab Crystal Phys, Krasnoyarsk, Russia; Far Eastern State Transport Univ, Dept Phys, Khabarovsk, Russia; Siberian Fed Univ, Dept Engn Phys & Radioelect, Krasnoyarsk, Russia)
  • Wang Wei (Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing, Peoples R China)
  • Guo Shibin (Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing, Peoples R China)
  • Huang Rongjin (Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing, Peoples R China)
  • Li Laifeng (Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing, Peoples R China)
  • Hu Zhanggui (Tianjin Univ Technol, Inst Funct Crystals, Tianjin, Peoples R China)
  • Lin Zheshuai (Chinese Acad Sci, Tech Inst Phys & Chem, Beijing, Peoples R China; Univ Chinese Acad Sci, Beijing, Peoples R China)

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