Electronic Theses and Dissertations

Identifier

6594

Date

2020

Date of Award

7-23-2020

Document Type

Thesis

Degree Name

Master of Science

Major

Physics

Concentration

Materials Science

Committee Chair

Thang Ba Hoang

Committee Member

Xiao Shen

Committee Member

Chenhui Peng

Abstract

Plasmonic nanostructures such as gold nanprods and gold nanostars are profoundly used in photoluminescence measurement and coherent random lasing. Radiative processes such as photoluminescence emission of nanomaterials can be profoundly modified by their interaction with plasmonic nanostructures. In the first part of this thesis, we demonstrate the photoluminescence enhancement, up to 25 times, of CdSe quantum dots which are sandwiched between a gold nanorod and a thin gold film. Our results show a promise for applications in optoelectronics and nanophotonics. Random lasing occurs as a result of coherent optical feedback from multiple scattering centers. In the second part of this thesis, we demonstrate that plasmonic gold nanostars are efficient light scattering centers, exhibiting strong field enhancement at their nanotips, which assists in a very narrow bandwidth and highly amplified coherent coherent random lasing with a low lasing thereshold.

Comments

Data is provided by the student.

Library Comment

dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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