Temperature variation of refractive index in GaSe

In this work we report on the pressure dependence of the refractive index of indium selenide (InSe) for polarization perpendicular to the c-axis (E⊥c). The refractive index dispersion n ⊥ (ω) of InSe has been measured between 0.77 and 1.5 eV for hydrostatic pressures up to 8 GPa and interpreted through a single oscillator Phillips-van Vechten model yielding the electronic refractive index and dielectric function. This model also yields the pressure dependence of the Penn gap in InSe, whose interlayer and intralayer deformation potentials have been obtained and compared with those of the lower energy optical gaps. The possible electronic transitions responsible for the Penn gaps for both polarizations (perpendicular and parallel to the c-axis) in InSe and other III-VI layered materials are also discussed on the basis of recent band structure calculations.

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“…3 -D 1c (hollow symbols) [29,43] in InSe as a function of pressure. Solid curves represent the fits of the data to equation (6).…”

Section: Penn Gap Under Pressurementioning

confidence: 99%

Pressure dependence of the refractive index in InSe

Manjón¹,

Vijver

Segura

et al. 2000

Semicond. Sci. Technol.

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“…The temperature variation of the ordinary index of refraction was measured by Antonioli et al [20] for temperatures from 300 to 75 K in the 0.5to 2.5-eV energy range. Their results are given by the expression n(hv) = A + B(hv) + C(hv) 3,…”

Section: Thermal Coefficientsmentioning

confidence: 99%

“…Coefficients of the Thermal Dependence of the Refractive Index Dispersion Relation[20] to be Used in Eq. (9)…”

mentioning

confidence: 99%

Gallium Selenide (GaSe)

Edwards

1997

Handbook of Optical Constants of Solids

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“…There are many techniques applied to determine the value of a refractive index [10][11][12][13][14][15][16][17][18][19][20][21][22]. However, all of them feature various limitations and disadvantages.…”

Section: Introductionmentioning

confidence: 99%