Even Dispersion of Emitters for the Purpose of High Intensity Single Photon Generation Pubblico

Abstract

Reliable, deterministic single photon emission is a necessary criterion for many quantum information and sensing protocols. However, as of now, near-ideal single photon sources have not been realized. One of the most promising platforms for single photon generation currently is the semiconductor quantum dot, which can reliably emit identical single photons after excitation with a quantum yield >50%. By preparing thin, evenly dispersed films of semiconductor quantum dots far enough apart that collective effects are negligible, we can effectively convert coherent laser light into single photons within a large region (~100 ²- 1 ²). We can then design a setup capable of measuring the emission (and correlations) across this region to determine whether or not we have single photon sources. Although we were unable to conclusively show that we had single photon emission as we did not measure correlations between photons, adjustments to the setup to measure this should be relatively easy to implement in the future. 

Table of Contents

Chapter 1

Introduction

1.1      Single Photon Sources: why

1.2      Single Photon Sources: theory

1.1.1     Photon Number Operator

1.3      Quantum Dots

1.4      Excitons

1.4.1    Recombination

1.4.2    Quantum Dot Shells

1.5      Motivation

Chapter 2

Methods

2.1      Specifications

2.2     Sample Preparation

2.2.1    Drop Casting

2.2.2       Spin Coating

2.2.3       Dip Coating

2.3     Light path Design

2.3.1    Excitation Path

2.3.2       Emission light path

Chapter 3

Results and Discussion

3.1      Drop Casting

3.2     Spin Coating

3.3     Dip Coating

3.4     Future Work

Conclusion

Bibliography

About this Honors Thesis

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School	Emory College
Department	Physics
Degree	B.S.
Submission	Honors Thesis
Language	English
Research Field	Physics, Quantum Physics, Condensed Matter Physics, Optics
Parola chiave	physics, optics, photonics, nano, nanophotonics, condensed matter, quantum dots, quantum, materials, thin film
Committee Chair / Thesis Advisor	Hayk Harutyunyan, Emory University
Committee Members	Ajit Srivastava, Emory University Jed Brody, Emory University

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