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Coupling of Light's Orbital Angular ...

Bahamran, Alaa A.

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Coupling of Light's Orbital Angular Momentum to a Quantum Dot Ensemble.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Coupling of Light's Orbital Angular Momentum to a Quantum Dot Ensemble./
作者:	Bahamran, Alaa A.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	151 p.
附註:	Source: Dissertations Abstracts International, Volume: 80-12, Section: B.
Contained By:	Dissertations Abstracts International80-12B.
標題:	Condensed matter physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13808464
ISBN:	9781392158845

Coupling of Light's Orbital Angular Momentum to a Quantum Dot Ensemble.
Bahamran, Alaa A.

Coupling of Light's Orbital Angular Momentum to a Quantum Dot Ensemble. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 151 p.

Source: Dissertations Abstracts International, Volume: 80-12, Section: B.

Thesis (Ph.D.)--University of Denver, 2019.

This item must not be added to any third party search indexes.

We theoretically and experimentally investigate the transfer of orbital angular momentum from light to an ensemble of semiconductor-based nanostructures composed of lead sulfide quantum dots. Using an ensemble of quantum dots offers a higher cross-section and more absorption of twisted light fields compared to experimentally challenging single-nanostructure measurements. However, each quantum dot (except for on-center) sees a displaced light beam parallel to its own axis of symmetry. The transition matrix elements for the light-matter interaction are calculated by expressing the displaced light beam in terms of the appropriate light field centered on the nanoparticles. The resulting transition rate induced by light's orbital angular momentum depends on the nanostructure size, the displacement between the beam center and nanostructure axis, and the ratio of the nanostructure size to the beam waist. In addition, while the strength of the transitions induced by twisted light is much weaker than those induced by plane waves for the center case, they are almost identical when conceding illuminating an ensemble of nanostructures. Although we attempted to measure this transfer of orbital angular momentum, due to experimental limitations the transfer remained undetectable.

ISBN: 9781392158845Subjects--Topical Terms:

3173567
Condensed matter physics.
Subjects--Index Terms:

Light's orbital angular momentum

Coupling of Light's Orbital Angular Momentum to a Quantum Dot Ensemble.
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500 $a Source: Dissertations Abstracts International, Volume: 80-12, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Siemens, Mark.
502 $a Thesis (Ph.D.)--University of Denver, 2019.
506 $a This item must not be added to any third party search indexes.
506 $a This item must not be sold to any third party vendors.
520 $a We theoretically and experimentally investigate the transfer of orbital angular momentum from light to an ensemble of semiconductor-based nanostructures composed of lead sulfide quantum dots. Using an ensemble of quantum dots offers a higher cross-section and more absorption of twisted light fields compared to experimentally challenging single-nanostructure measurements. However, each quantum dot (except for on-center) sees a displaced light beam parallel to its own axis of symmetry. The transition matrix elements for the light-matter interaction are calculated by expressing the displaced light beam in terms of the appropriate light field centered on the nanoparticles. The resulting transition rate induced by light's orbital angular momentum depends on the nanostructure size, the displacement between the beam center and nanostructure axis, and the ratio of the nanostructure size to the beam waist. In addition, while the strength of the transitions induced by twisted light is much weaker than those induced by plane waves for the center case, they are almost identical when conceding illuminating an ensemble of nanostructures. Although we attempted to measure this transfer of orbital angular momentum, due to experimental limitations the transfer remained undetectable.
590 $a School code: 0061.
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650 4 $a Materials science. $3 543314
653 $a Light's orbital angular momentum
653 $a Quantum dot ensemble
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690 $a 0794
710 2 $a University of Denver. $b Physics and Astronomy. $3 3545038
773 0 $t Dissertations Abstracts International $g 80-12B.
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