Open AccessФотоиндуцированная обратимая локальная деформация рельефа поверхности в объемных монокристаллах TlInSe-=SUB=-2-=/SUB=-, TlGaTe-=SUB=-2-=/SUB=- и TlSe
Author(s) -
YongGu Shim,
Taro Asahi,
Kazuki Wakita,
Nazim Mamedov,
Е.Н. Алиева,
Н. А. Абдуллаев
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.14.46349.17125
Subject(s) - dilatometer , materials science , laser , ellipsometry , attenuation length , radiation , deformation (meteorology) , thermal conductivity , optics , thermal expansion , analytical chemistry (journal) , composite material , chemistry , thin film , physics , nanotechnology , chromatography
Giant macroscopic expansion of the surface relief, localized within a laser spot size, has been observed in bulk single crystals of TlInSe_2, TlGaTe_2, and TlSe at room temperature and laser radiation densities lower by at least two orders of magnitude than the material optical damage threshold. Quantitative estimations of the deformation magnitude in this local region were obtained using an interference dilatometer. The photon absorption length was determined with the aid of spectroscopic ellipsometry. It is established that the surface deformation amounts to 2.6 × 10^–3 at a laser radiation intensity of 19 mW/mm^2. The observed phenomenon has a thermal nature and is probably related to a low thermal conductivity of the materials studied.