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Resonance optical spectroscopy of long-period quantum-well structures
- Source :
- Physics of the Solid State. 39:1852-1858
- Publication Year :
- 1997
- Publisher :
- Pleiades Publishing Ltd, 1997.
-
Abstract
- Theory of specular light reflection from long-period quantum-well structures taking into account the exciton contribution to dielectric polarization has been developed for an arbitrary relation between the background refractive index in the well, n a, and barrier-material refractive index nb. General expressions for the optical reflection and transmission coefficients for a structure with N equidistant quantum wells are derived with the use of the Green’s function and transfer matrix methods. Normal and oblique light reflectance spectra from II-VI-based heterostructures were found to reveal a bright interference pattern caused by the difference between n a and n b. A comparison of the theory with experiment has yielded the dispersion of n a and n b within a broad wavelength range and the parameters of the quasi-two-dimensional heavyhole exciton (e1-hh1), namely, the resonant frequency and the radiative and nonradiative damping rates. Reflectance spectra from resonant Bragg and quasi-Bragg structures with real exciton parameters are calculated, and the effect on these spectra of the refractive-index difference and the deviation from the Bragg condition is analyzed.
- Subjects :
- Condensed Matter::Quantum Gases
Materials science
business.industry
Exciton
Physics::Optics
Bragg's law
Resonance
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Optics
Dispersion (optics)
Reflection (physics)
Atomic physics
business
Spectroscopy
Refractive index
Quantum well
Subjects
Details
- ISSN :
- 10906460 and 10637834
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- Physics of the Solid State
- Accession number :
- edsair.doi...........eabd12d4d907c2c818414de624497f3c