Please use this identifier to cite or link to this item: https://ir.sc.mahidol.ac.th/handle/123456789/670
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dc.contributor.authorTanakorn Osotchanen_US
dc.date.accessioned2017-03-31T07:11:04Z-
dc.date.available2017-03-31T07:11:04Z-
dc.date.issued2000-
dc.identifier.citationMaterials Research Society Symposiumen_US
dc.identifier.issn02729172-
dc.identifier.urihttps://ir.sc.mahidol.ac.th/handle/123456789/670-
dc.description.abstractIn order to calculate optical properties i.e. dielectric function, refractive index and absorption coefficient, the evaluation of integration including ground and excited wavefunctions is required over entire k-space. The contour of energy dispersion was proposed to form the criteria to select and limit the value of k in the integration. With the contour approach the integration can be determined to truncate at certain k value where the weight factor of Fermi-Dirac distribution function become very small and the fraction of integration can be ignored. The approach was applied to AlGaAs/AlAs/GaAs double barrier quantum well structures with 14-band k.p Hamiltonian. By systematically modifing this quantum well structure the dependence of absorption peak width was investigated in bound-to-bound and bound-to-quasibound intersubband transitions. The energy dispersion contours of each involved state were illustrated in two dimensional k-space including the compositions in perpendicular and parallel directions to the interface. The calculated refractive index and absorption as a function of wavelength can be simply extracted from the contour characteristic especially at the constant Fermi energy surface.en_US
dc.language.isoen_USen_US
dc.publisherOptical Properties of Materialsen_US
dc.subjectFermi-Diracen_US
dc.subjectEnergyen_US
dc.subjectHamiltonianen_US
dc.subjectquantum wellen_US
dc.titleEnergy dispersion contour approach to calculate optical properties of quantum well structuresen_US
dc.typeArticleen_US
Appears in Collections:Physics: International Proceedings

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