2021.11.15 Oluseye Akomolede.pdf (2.49 MB)
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COMPUTATIONAL DESIGN AND EXPERIMENTAL VALIDATION OF DIAMOND-BASED QUANTUM EMITTERS

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posted on 15.11.2021, 16:22 by Oluseye AkomoledeOluseye Akomolede

The enhancement of the emission from nitrogen vacancy color centers will help facilitate advancements in quantum information technology. To this end, the reduction of the excited state lifetimes of NVs as well as the design of devices which support electroluminescence of nitrogen vacancies, as well as the broadband enhancement of the emission from these centers is of great importance.

In this study, we create diamond thin films containing nitrogen vacancy color centers using salt-assisted ultrasonic disaggregation techniques and electrophoretic deposition. These films are implanted with xenon atoms and the resulting structures are characterized optically. We report a reduction in the bulk emission lifetime of nitrogen vacancy color centers of two orders of magnitude. A coupled-mode theory approach is used to analyze the emission from the xenon-doped nanodiamond species. It is determined that the lifetime reduction occurs due to coupling between nitrogen vacancy color centers and xenon color centers within the diamond lattice.

A diamond field effect transistor is investigated via simulations utilizing Sentaurus TCAD software. The device is scaled by three orders of magnitude from previous experiments involving the same structure. Transport characteristics are obtained from simulation results. We confirm the existence of a decreasing saturation voltage with a decrease in gate length in the diamond field effect transistor. Further investigation into the device’s viability as a quantum emitter is conducted.

The design of a single photon source utilizing plasmonic structures to enhance emission from nitrogen vacancy color centers is proposed. The plasmonic structure is investigated to extract operating parameters and to quantify the optical coupling and propagation characteristics for various physical dimensions

The design of a plasmonic device which features both electroluminescence via nitrogen vacancy color centers and their enhancement via plasmonic effects is numerically simulated. The device features large Purcell enhancement factor and good photon emission rate. In summary, this work paves the way towards the advancement of the nitrogen vacancy color center as a stable source of room temperature photons for quantum information applications.

History

Degree Type

Doctor of Philosophy

Department

Electrical and Computer Engineering

Campus location

West Lafayette

Advisor/Supervisor/Committee Chair

Peter Bermel

Additional Committee Member 2

Andrew Weiner

Additional Committee Member 3

Dimitrios Peroulis

Additional Committee Member 4

Daniel S. Elliott