Interference of exciton-polariton waves in GaSe nanocrystals

被引：2
|
作者：
Zalamai, V. V. [1 ,2 ]
Stamov, I. G. [3 ]
Syrbu, N. N. [1 ]
机构：
[1] Tech Univ Moldova, Lab Opt Spect & Optic Commun, 168 Stefan cel Mare Ave, Kishinev 2004, Moldova
[2] Tech Univ Moldova, Natl Ctr Mat Study & Testing, Bv Stefan cel Mare 168, Kishinev 2004, Moldova
[3] TG Shevchenko State Univ Pridnestrovie, 25 Oktyabrya St 107, Tiraspol 3300, Moldova
来源：
MATERIALS TODAY COMMUNICATIONS | 2021年 / 27卷
关键词：
Gallium selenide; Exciton polaritons; Optical spectra; Interference of additional waves; Polaritonic branches;
D O I：
10.1016/j.mtcomm.2021.102355
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Absorption, reflection, photoluminescence and wavelength modulation transmission spectra of GaSe single crystals were investigated in temperature rage 300 - 10 K. From fitting of contours of excitonic reflection spectra parameters of excitons as energy of transversal exciton (omega(0) = 2.1212 eV, longitudinal transversal splitting omega(LT) = 2.3 meV, effective mass M = 2.5m(0), background permittivity epsilon(b) = 5.2 and damping constant gamma = 1.4 were determined. Effective masses of electrons (m(C1) = 0.37m(0)) and holes (m(C1) = 2.13m(0)) in the Brillouin zone center were estimated. An interference of waves of upper and lower branches of exciton-polaritons was found out in wavelength modulation transmission spectra of GaSe nanocrystals.
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页数：5
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