東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Spectrally resolved optical study of...

Chen, Zhigang.

FindBook

Google Book

Amazon

博客來

Spectrally resolved optical study of transient spin dynamics in semiconductors.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Spectrally resolved optical study of transient spin dynamics in semiconductors./
作者:	Chen, Zhigang.
面頁冊數:	127 p.
附註:	Adviser: Steven T. Cundiff.
Contained By:	Dissertation Abstracts International68-03B.
標題:	Physics, Condensed Matter. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3256384

Spectrally resolved optical study of transient spin dynamics in semiconductors.
Chen, Zhigang.

Spectrally resolved optical study of transient spin dynamics in semiconductors. - 127 p.

Adviser: Steven T. Cundiff.

Thesis (Ph.D.)--University of Colorado at Boulder, 2007.

Using the spin of the electron to carry information, instead of or in addition to its charge, could provide advances in the capabilities of microelectronics. Successful implementation of spin-based electronics requires preservation of the electron spin coherence. Long spin coherence times have been observed in lightly n-doped semiconductors, with a maximum at a "magic" electron density. We systematically study the spin dynamics of the electron in a GaAs quantum well, where the electron density in the well can be varied through optical excitation. We show that spin coherence is lost due to the interplay between localization by disorder and dynamical scattering. The disorder potential is characterized by measuring the electron Lande g factor dependence on density. Our results show that the longest spin coherence is obtained for weakly localized spins, which may dictate a compromise in the design of devices between increasing the spin coherence time and improving transport properties.Subjects--Topical Terms:

1018743
Physics, Condensed Matter.

Spectrally resolved optical study of transient spin dynamics in semiconductors.
LDR:02568nam 2200277 a 45 001 948221
005 20110524
008 110524s2007 ||||||||||||||||| ||eng d
035 $a (UMI)AAI3256384
035 $a AAI3256384
040 $a UMI $c UMI
100 1 $a Chen, Zhigang. $3 1271681
245 1 0 $a Spectrally resolved optical study of transient spin dynamics in semiconductors.
300 $a 127 p.
500 $a Adviser: Steven T. Cundiff.
500 $a Source: Dissertation Abstracts International, Volume: 68-03, Section: B, page: 1699.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2007.
520 $a Using the spin of the electron to carry information, instead of or in addition to its charge, could provide advances in the capabilities of microelectronics. Successful implementation of spin-based electronics requires preservation of the electron spin coherence. Long spin coherence times have been observed in lightly n-doped semiconductors, with a maximum at a "magic" electron density. We systematically study the spin dynamics of the electron in a GaAs quantum well, where the electron density in the well can be varied through optical excitation. We show that spin coherence is lost due to the interplay between localization by disorder and dynamical scattering. The disorder potential is characterized by measuring the electron Lande g factor dependence on density. Our results show that the longest spin coherence is obtained for weakly localized spins, which may dictate a compromise in the design of devices between increasing the spin coherence time and improving transport properties.
520 $a We also explore the intimate connection between electron spin and optical excitation that initiates and controls the spin states. We study the interplay of spin dynamics between excitons, negatively charged excitons and the two-dimensional electron gas in a lightly n-doped semiconductor quantum well. The spin of the electron gas can be polarized through interband transitions, and the electron spin can persist long after the recombination of optically excited carriers. We find that the excitation of spin polarization of the resident electrons depends on the recombination times and spin relaxation times of the optically excited carriers and the energy chosen for the light pulses.
590 $a School code: 0051.
650 4 $a Physics, Condensed Matter. $3 1018743
650 4 $a Physics, Optics. $3 1018756
690 $a 0611
690 $a 0752
710 2 0 $a University of Colorado at Boulder. $3 1019435
773 0 $t Dissertation Abstracts International $g 68-03B.
790 $a 0051
790 1 0 $a Cundiff, Steven T., $e advisor
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3256384