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Exploring cooperative effects with nitrogen-vacancy centres in diamond

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thesis
posted on 28.03.2022, 01:42 by Rochelle Martin
We present a theoretical study of superradiance with nitrogen-vacancy centres in nanodiamonds. Superradiance is a radiation phenomenon where identical proximal atoms emit photons collectively. A nitrogen-vacancy centre is an \artificial atom" in which indistinguishability cannot be assumed a priori. Nevertheless, superradiance from nitrogen-vacancy centres in nanodiamond has been observed very recently. While a phenomenological model built on Dicke states and the known properties of nitrogen-vacancy centres was able to explain the experimental findings well, many of the microscopic details that introduce distinguishability were not included: (i) photon emission into orientation-dependent superpositions of polarizations, (ii) transition and permanent dipole-dipole interactions, (iii) random distributions of transition frequencies and spatial locations, and (iv) nitrogen-vacancy centres couple to lattice vibrations. These effects are generally expected to diminish superradiance. In this thesis, we develop numerical simulations based on a model which takes these features into account. Our program can, in principle, perform simulations on the emission dynamics of up to 13 centres. Based on the results presented, we conclude that superradiance persists for certain nitrogen-vacancy centre densities, consistent with the experimental findings. Furthermore, our simulation tools provide a theoretical framework to study coherently driven dynamics, other temperature regimes, or use of other colour centres.

History

Table of Contents

1. Introduction -- 2. Superradiance -- 3. Nitrogen-vacancy centres in diamond -- 4. Details of the simulation -- 5. Results and discussion -- 6. Outlook -- Appendix -- References.

Notes

Bibliography: pages 63-71 Empirical thesis.

Awarding Institution

Macquarie University

Degree Type

Thesis MRes

Degree

MRes, Macquarie University, Faculty of Science and Engineering, Department of Physics and Astronomy

Department, Centre or School

Department of Physics and Astronomy

Year of Award

2017

Principal Supervisor

Thomas Volz

Additional Supervisor 1

Gavin Brennen

Additional Supervisor 2

Ben Baragiola

Rights

Copyright Rochelle Martin 2017. Copyright disclaimer: http://mq.edu.au/library/copyright

Language

English

Extent

1 online resource (viii, 71 pages) diagrams, graphs

Former Identifiers

mq:70172 http://hdl.handle.net/1959.14/1260962