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

Indirect excitons in gallium arsenid...

High, Alexander Arthur.

FindBook

Google Book

Amazon

博客來

Indirect excitons in gallium arsenide coupled quantum wells: Development of optoelectronic logic devices and trapping potentials, and studies of low temperature phenomena in a bosonic condensed matter system.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Indirect excitons in gallium arsenide coupled quantum wells: Development of optoelectronic logic devices and trapping potentials, and studies of low temperature phenomena in a bosonic condensed matter system./
作者:	High, Alexander Arthur.
面頁冊數:	141 p.
附註:	Source: Dissertation Abstracts International, Volume: 74-01(E), Section: B.
Contained By:	Dissertation Abstracts International74-01B(E).
標題:	Condensed matter physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3526751
ISBN:	9781267607737

Indirect excitons in gallium arsenide coupled quantum wells: Development of optoelectronic logic devices and trapping potentials, and studies of low temperature phenomena in a bosonic condensed matter system.
High, Alexander Arthur.

Indirect excitons in gallium arsenide coupled quantum wells: Development of optoelectronic logic devices and trapping potentials, and studies of low temperature phenomena in a bosonic condensed matter system. - 141 p.

Source: Dissertation Abstracts International, Volume: 74-01(E), Section: B.

Thesis (Ph.D.)--University of California, San Diego, 2012.

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

Indirect excitons in coupled quantum wells form a unique system for both development of novel optoelectronic devices as well as studies of the low temperature physics of bosons in condensed matter systems. An exciton is a quasiparticle which is a bound state of an electron and hole. Excitons can be created by light, and when they recombine they can emit light. In an indirect exciton, the electron and hole are spatially separated, which results in a long exciton lifetime as well as an electronic dipole moment. The long lifetime allows excitons to travel over large distances &sim; 100 microm. The electronic dipole moment allows direct electronic control of the exciton energy. Therefore, as an optical media that is also electronically controllable, indirect excitons offer promise for development of new, efficient optoelectronic devices. In this dissertation, we prototype two new optoelectronic devices based on indirect excitons: the exciton optoelectronic transistor, and the excitonic integrated circuit. In addition, the long radiative lifetime allows indirect excitons to cool to very low temperatures below the temperature of quantum degeneracy. Traps are of particular interest for studies of low temperature gases, as they facilitate creation of high density, cold gases as well as offer opportunities for in situ control of the gas. This dissertation presents novel, precisely engineered trapping potentials for exciton gases based on electronic control and makes a thorough examination of the physical properties of the trapped gas. Furthermore, as a bosonic quasiparticle, excitons can be expected to form a condensate under certain density and temperature conditions. A signature of condensation is the emergence of spontaneous extended coherence, where the coherence length significantly exceeds its classically expected value. We present the first evidence for extended spatial coherence in an exciton system - the system of exciton rings. A pattern of extended spontaneous coherence is correlated with a pattern of spontaneous polarization, revealing the properties of a multicomponent coherent state. We also observed phase singularities in the coherent exciton gas. Lastly, we probe the spatial coherence of excitons in an electrostatic trap and present direct evidence for Bose-Einstein condensation of excitons therein.

ISBN: 9781267607737Subjects--Topical Terms:

3173567
Condensed matter physics.

Indirect excitons in gallium arsenide coupled quantum wells: Development of optoelectronic logic devices and trapping potentials, and studies of low temperature phenomena in a bosonic condensed matter system.
LDR:03435nmm a2200289 4500 001 2059920
005 20150822105423.5
008 170521s2012 ||||||||||||||||| ||eng d
020 $a 9781267607737
035 $a (MiAaPQ)AAI3526751
035 $a AAI3526751
040 $a MiAaPQ $c MiAaPQ
100 1 $a High, Alexander Arthur. $3 3174054
245 1 0 $a Indirect excitons in gallium arsenide coupled quantum wells: Development of optoelectronic logic devices and trapping potentials, and studies of low temperature phenomena in a bosonic condensed matter system.
300 $a 141 p.
500 $a Source: Dissertation Abstracts International, Volume: 74-01(E), Section: B.
500 $a Adviser: Leonid V. Butov.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2012.
506 $a This item must not be sold to any third party vendors.
520 $a Indirect excitons in coupled quantum wells form a unique system for both development of novel optoelectronic devices as well as studies of the low temperature physics of bosons in condensed matter systems. An exciton is a quasiparticle which is a bound state of an electron and hole. Excitons can be created by light, and when they recombine they can emit light. In an indirect exciton, the electron and hole are spatially separated, which results in a long exciton lifetime as well as an electronic dipole moment. The long lifetime allows excitons to travel over large distances &sim; 100 microm. The electronic dipole moment allows direct electronic control of the exciton energy. Therefore, as an optical media that is also electronically controllable, indirect excitons offer promise for development of new, efficient optoelectronic devices. In this dissertation, we prototype two new optoelectronic devices based on indirect excitons: the exciton optoelectronic transistor, and the excitonic integrated circuit. In addition, the long radiative lifetime allows indirect excitons to cool to very low temperatures below the temperature of quantum degeneracy. Traps are of particular interest for studies of low temperature gases, as they facilitate creation of high density, cold gases as well as offer opportunities for in situ control of the gas. This dissertation presents novel, precisely engineered trapping potentials for exciton gases based on electronic control and makes a thorough examination of the physical properties of the trapped gas. Furthermore, as a bosonic quasiparticle, excitons can be expected to form a condensate under certain density and temperature conditions. A signature of condensation is the emergence of spontaneous extended coherence, where the coherence length significantly exceeds its classically expected value. We present the first evidence for extended spatial coherence in an exciton system - the system of exciton rings. A pattern of extended spontaneous coherence is correlated with a pattern of spontaneous polarization, revealing the properties of a multicomponent coherent state. We also observed phase singularities in the coherent exciton gas. Lastly, we probe the spatial coherence of excitons in an electrostatic trap and present direct evidence for Bose-Einstein condensation of excitons therein.
590 $a School code: 0033.
650 4 $a Condensed matter physics. $3 3173567
650 4 $a Low temperature physics. $3 3173917
690 $a 0611
690 $a 0598
710 2 $a University of California, San Diego. $b Physics. $3 1035951
773 0 $t Dissertation Abstracts International $g 74-01B(E).
790 $a 0033
791 $a Ph.D.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3526751