Journal ArticleDOI
Optical properties of crystalline semiconductors and dielectrics
Abdul Rahim Forouhi,Iris Bloomer +1 more
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TLDR
Far fewer parameters, all of which have physical significance, are required and they can be determined for a particular material from the position and strength of the peaks in the k spectrum.Abstract:
A new formulation for the complex index of refraction, N(E)=n(E)-ik(E), as a function of photon energy E, for crystalline semiconductors and dielectrics is developed based on our previous derivation of N(E) for amorphous materials. The extinction coefficient k(E) is deduced from a one-electron model with finite lifetime for the excited electron state. The refractive index n(E) is then derived from the Kramers-Kronig relation as the Hilbert transform of k(E). It is shown that n(\ensuremath{\infty})g1. Excellent agreement is found between our equations for n(E) and k(E) and published measured values for crystalline Si, Ge, GaP, GaAs, GaSb, InP, InAs, InSb, SiC, cubic C, and \ensuremath{\alpha}-${\mathrm{SiO}}_{2}$, over a wide range of energies (\ensuremath{\sim}0--20 eV). Far fewer parameters, all of which have physical significance, are required and they can be determined for a particular material from the position and strength of the peaks in the k spectrum.read more
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Methods for the determination of the optical constants of thin films from single transmission measurements: a critical review
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Layer-by-layer assembly of titania nanosheet/polycation composite films
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Giant anisotropic nonlinear optical response in transition metal monopnictide Weyl semimetals
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TL;DR: In this paper, an optical second-harmonic generation study of a series of transition metal monopnictide Weyl semimetals reveals a giant, anisotropic nonlinear optical response in these systems.
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