The electronic absorption edge in layer type crystals

Ralph, H. I.

doi:10.1016/0038-1098(65)90082-7

Cited by 72 publications

(23 citation statements)

References 3 publications

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“…The anisotropy parameter y ) 6), calculated using the values pt) 1.1, ,ufi for A,, Table 3, is given by y = 0.8 f 0.3. Substituting the values of ,$ for B,, Table 3, and p t , determined from RZ, in equation (5) gives p7 -0.4 m,.…”

Section: Discussionmentioning

confidence: 99%

Delocalized excitons in thin anisotropic crystals

Evans

Young

1968

Physica Status Solidi (b)

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The ordinary absorption spectrum of MoS, contains two series of exciton absorption bands associated with direct optical transitions from a split valence band. I n thick crystals the first five members of each exciton series have been detected; these exciton bands move to higher energies and show a diminishing diamagnetic shift with decreasing crystal thickness. The exciton series limit in thin crystals is determined from the oscillatory magneto absorption which occurs to the high energy side of the short wavelength series.Das normale Absorptionsspektrum von MoS, enthiilt zwei Serien von Exzitonenabsorptionsbanden, die mit dirckten optischen Ubergiingen von einem aufgespaltenen Valenzband verbunden sind. An dicken Kristallen sind die ersten fiinf Linien beider Serien gemessen worden; bei abnehmender Kristalldicke werden diese Exzitonenbenden zu hoheren Energien hin verschoben und zeigen eine verminderte diamagnetische Verschiebung. Die Grenze der Exzitonenserien wird in diinnen Kristallen von der oszillatorischen Magnetoabsorption bestimmt, die auf der Hochenergieseite der kurzwelligen Serien eintritt.

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Section: Discussionmentioning

confidence: 99%

Delocalized excitons in thin anisotropic crystals

Evans

Young

1968

Physica Status Solidi (b)

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“…In particular, the electron-hole pairs bound by the Coulomb attraction, also known as Wannier excitons, play a major role near the absorption threshold of these new materials. [3][4][5] As a consequence, many theoretical and experimental studies have been devoted to the explanation of the absorption spectra of structures of ''reduced dimensionality.'' [6][7][8][9][10][11][12][13][14][15] Many sophisticated calculations have been published for quantum wells and wires, 7,12,[16][17][18][19][20] some of which take into account valence-band mixing and nonparabolicity effects in the energies and oscillator strengths of the optical transitions.…”

Section: Introductionmentioning

confidence: 99%

Analytical model for the refractive index in quantum wells derived from the complex dielectric constant of Wannier excitons in noninteger dimensions

Tanguy

Lefèbvre

Mathieu

et al. 1997

Journal of Applied Physics

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Articles you may be interested inDielectric effect of changes of refractive index in a Mg based II-VI semiconductor nanostructure AIP Conf. Influence of polarization induced electric fields on the wavelength and the refractive index of intersubband transitions in AlN/GaN coupled double quantum wellsFemtosecond time-resolved dispersion relation of complex nonlinear refractive index in a semiconductor quantum well Absorption spectra of low-dimensional structures such as quantum wells or wires have been strikingly well reproduced by expressions based on solutions of the Schrödinger equation for the Coulomb potential in noninteger dimensions, which require much less computational effort than more elaborate calculations. The compact and analytical complex dielectric constant of Wannier excitons in d dimensions is given, and included in a simple model of the refractive index in quantum well structures in the vicinity of the absorption threshold.

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“…In the crystal, the electron-hole interaction modifies the absorption above the critical point as well. For Mo critical points in two-dimensional crystals, the exciton spectrum is different, with E = Eo -R~,J(2n-1) 2, and the dependence of absorption strength on n is different from the three-dimensional case [ 10,11]. As shown schematically in Fig.…”

Section: Electron-hole Interaction Excltonsmentioning

confidence: 97%

Interband Absorption —Mechanisms and Interpretation

Lynch

1997

Handbook of Optical Constants of Solids

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The electronic absorption edge in layer type crystals

Cited by 72 publications

References 3 publications

Delocalized excitons in thin anisotropic crystals

Delocalized excitons in thin anisotropic crystals

Analytical model for the refractive index in quantum wells derived from the complex dielectric constant of Wannier excitons in noninteger dimensions

Interband Absorption —Mechanisms and Interpretation

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