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The Study of Coupling in InGaAs Quantum Rings Grown by Droplet Epitaxy

Alsolamy, Samar M.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1357840899

Abstract Details

2013, Master of Science (MS), Ohio University, Physics and Astronomy (Arts and Sciences).
The use of metal droplet epitaxy may provide a novel method of growing laterally coupled nanostructures. We will present optical studies of InAs/GaAs nanostructures which result in twin quantum dots (QD) formed on a single quantum ring (QR). Previous studies have investigated the coupling between vertically grown quantum dot pairs. In this thesis, we have used photoluminescence (PL) and photoluminescence excitation (PLE) to examine the possibility of energy transfer and coupling between quantum dot pairs in a single InGaAs quantum ring grown by droplet epitaxy. Power dependent photoluminescence spectra reveal a few peaks at low power, which are identified with emission from the ground state of the individual dots. As the power is increased we observe multi-exciton and excited state emission. We then perform PLE, tuning the excitation laser energy continuously from the high energy ring emission down to the individual dot states. We have observed resonant PLE emission in the QD/QR structures both at high laser energy and when resonant with the identified states of one of the QDs which may indicate energy transfer and/or coupling between the dots.
Eric Stinaff, Professor (Advisor)
David Drabold, Professor (Committee Chair)
Alexander Govorov, Professor (Committee Member)
92 p.
Condensed Matter Physics
Quantum Rings; Quantum Dots; Energy Transfer; Droplet Epitaxy; Photoluminescence Excitation; Photoluminescence.

Recommended Citations

Citations

  • Alsolamy, S. M. (2013). The Study of Coupling in InGaAs Quantum Rings Grown by Droplet Epitaxy [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1357840899

    APA Style (7th edition)

  • Alsolamy, Samar. The Study of Coupling in InGaAs Quantum Rings Grown by Droplet Epitaxy. 2013. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1357840899.

    MLA Style (8th edition)

  • Alsolamy, Samar. "The Study of Coupling in InGaAs Quantum Rings Grown by Droplet Epitaxy." Master's thesis, Ohio University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1357840899

    Chicago Manual of Style (17th edition)

ohiou1357840899
739
© 2013, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.