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High resolution nonlinear laser spec...

Jiang, Min.

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High resolution nonlinear laser spectroscopy of the optical properties of excitons in semiconductor gallium arsenide.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	High resolution nonlinear laser spectroscopy of the optical properties of excitons in semiconductor gallium arsenide./
作者:	Jiang, Min.
面頁冊數:	160 p.
附註:	Source: Dissertation Abstracts International, Volume: 56-08, Section: B, page: 4393.
Contained By:	Dissertation Abstracts International56-08B.
標題:	Physics, Optics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9542989

High resolution nonlinear laser spectroscopy of the optical properties of excitons in semiconductor gallium arsenide.
Jiang, Min.

High resolution nonlinear laser spectroscopy of the optical properties of excitons in semiconductor gallium arsenide. - 160 p.

Source: Dissertation Abstracts International, Volume: 56-08, Section: B, page: 4393.

Thesis (Ph.D.)--University of Michigan, 1994.

This item must not be sold to any third party vendors.

This dissertation involves a study of the nonlinear optical properties of excitons in semiconductor GaAs using high resolution frequency domain nonlinear laser spectroscopy, particularly differential transmission and four-wave-mixing. The most important work of this thesis consists of three specific topics: magnetic field effects, the polarization dependence of the nonlinear optical properties of bulk excitons, and nonlinear optical absorption and dynamics in quantum wells.Subjects--Topical Terms:

1018756
Physics, Optics.

High resolution nonlinear laser spectroscopy of the optical properties of excitons in semiconductor gallium arsenide.
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100 1 $a Jiang, Min. $3 3171860
245 1 0 $a High resolution nonlinear laser spectroscopy of the optical properties of excitons in semiconductor gallium arsenide.
300 $a 160 p.
500 $a Source: Dissertation Abstracts International, Volume: 56-08, Section: B, page: 4393.
500 $a Chair: Duncan G. Steel.
502 $a Thesis (Ph.D.)--University of Michigan, 1994.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a This dissertation involves a study of the nonlinear optical properties of excitons in semiconductor GaAs using high resolution frequency domain nonlinear laser spectroscopy, particularly differential transmission and four-wave-mixing. The most important work of this thesis consists of three specific topics: magnetic field effects, the polarization dependence of the nonlinear optical properties of bulk excitons, and nonlinear optical absorption and dynamics in quantum wells.
520 $a The nonlinear optical properties of semiconductors are described using the semiconductor Bloch equations, which include many-body effects such as electron-hole Coulomb interaction and effects of the Pauli principle. These equations formally resemble the ordinary density matrix formalism common in nonlinear optics and spectroscopy, hence the line shape theory derived for a two-level system becomes applicable. The line shape theory is then applied to discuss two of the most important types of measurements: the measurement of the spectral response and of the decay dynamics.
520 $a In the nonlinear magneto-optical study, a field induced decrease in exciton mobility (magnetic freeze out) is observed for the first time for excitons in GaAs. Data also demonstrate that the Coulomb interaction dominates the nonlinear optical response, leading to a strong inter-Landau level coupling. Detailed analysis of decay dynamics further proves that the inter-Landau level coupling strength relative to that of intra-Landau level interaction decreases with increasing magnetic field, reaching to a ratio $\sim$1:2 at a magnetic field of 6 Tesla.
520 $a High resolution polarization sensitive four-wave mixing spectral response due to the spin-dependent interaction of excitons in GaAs reveals an excitation-density-independent red shift relative to the exciton resonance. The existence of an additional nonlinearity besides that of the exciton is further confirmed by the polarization dependence of diffusion coefficients and the life time measurement. The results suggest the presence of a strong nonlinear response from biexcitons.
520 $a Nonlinear optical spectra of excitons in GaAs/AlGaAs quantum wells exhibit an increase in absorption and a nonlinear component with a lifetime of the order ${\sim\mu}$s. The long life time and the experimentally determined absence of excitation spatial diffusion of this component lead to the proposal of formation of coherent $e$-$h$ pairs spatially separated due to interface roughness. Combined with ordinary free excitons, the proposed model properly describes the observed nonlinear response.
590 $a School code: 0127.
650 4 $a Physics, Optics. $3 1018756
650 4 $a Physics, Condensed Matter. $3 1018743
650 4 $a Materials science. $3 543314
690 $a 0752
690 $a 0611
690 $a 0794
710 2 $a University of Michigan. $3 777416
773 0 $t Dissertation Abstracts International $g 56-08B.
790 $a 0127
791 $a Ph.D.
792 $a 1994
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9542989