Pushing cavity-based single photon sources to the limit: photon feedback, coherent repumping and multilayer cavities
<p>This thesis presents important aspects and limitations of an a priori deterministic single-photon source using single 87 Rb atoms coupled to a high finesse optical cavity. The photons emitted from this source demonstrate long coherence times, interfering over a time of up to 450 ns, demonst...
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| Format: | Thesis |
| Language: | English |
| Published: |
2022
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| _version_ | 1797110784084410368 |
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| author | Álvarez Velásquez, JR |
| author2 | Kuhn, A |
| author_facet | Kuhn, A Álvarez Velásquez, JR |
| author_sort | Álvarez Velásquez, JR |
| collection | OXFORD |
| description | <p>This thesis presents important aspects and limitations of an a priori deterministic single-photon source using single 87 Rb atoms coupled to a high finesse optical cavity. The photons emitted from this source demonstrate long coherence times, interfering over a time of up to 450 ns, demonstrating a two-photon Hong-Ou-Mandel visibility of 0.78 +/- 0.04 over the entire photon interaction time, with no degradation of coherence observed when implementing a feedback mechanism to route the photons through a desired output port.</p>
<p>The later chapters of the thesis examine two challenges that arise when trying to improve the scalability of photon production, with the aim of producing streams of several single photons that could be used beyond two-photon interference:</p>
<p>The first is the production of polarised photons, which has been done so far by unfolding the magnetic structure of the atom, a technique that may result in a nonlinear mixing of the states. In this thesis, we examine a way to produce polarised photons that does not need to unfold the magnetic structure of the atom.</p>
<p>The second is the reduction of the cavity mode volume. As higher photon efficiencies are achieved with ever smaller mode volumes, the fabrication of novel cavities could potentially reach a regime where the multilayer structure of the dielectric mirrors becomes relevant to the interaction of an atom with the cavity. This thesis derives coupling factors that take this structure into account.</p> |
| first_indexed | 2024-03-07T07:59:44Z |
| format | Thesis |
| id | oxford-uuid:e75b43b7-fa63-4f40-959e-07c68c1a2f7e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T07:59:44Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | oxford-uuid:e75b43b7-fa63-4f40-959e-07c68c1a2f7e2023-09-13T10:26:50ZPushing cavity-based single photon sources to the limit: photon feedback, coherent repumping and multilayer cavitiesThesishttp://purl.org/coar/resource_type/c_db06uuid:e75b43b7-fa63-4f40-959e-07c68c1a2f7eCavity resonatorsPhotonicsAtomic theoryQuantum opticsEnglishHyrax Deposit2022Álvarez Velásquez, JRKuhn, AFarrow, T<p>This thesis presents important aspects and limitations of an a priori deterministic single-photon source using single 87 Rb atoms coupled to a high finesse optical cavity. The photons emitted from this source demonstrate long coherence times, interfering over a time of up to 450 ns, demonstrating a two-photon Hong-Ou-Mandel visibility of 0.78 +/- 0.04 over the entire photon interaction time, with no degradation of coherence observed when implementing a feedback mechanism to route the photons through a desired output port.</p> <p>The later chapters of the thesis examine two challenges that arise when trying to improve the scalability of photon production, with the aim of producing streams of several single photons that could be used beyond two-photon interference:</p> <p>The first is the production of polarised photons, which has been done so far by unfolding the magnetic structure of the atom, a technique that may result in a nonlinear mixing of the states. In this thesis, we examine a way to produce polarised photons that does not need to unfold the magnetic structure of the atom.</p> <p>The second is the reduction of the cavity mode volume. As higher photon efficiencies are achieved with ever smaller mode volumes, the fabrication of novel cavities could potentially reach a regime where the multilayer structure of the dielectric mirrors becomes relevant to the interaction of an atom with the cavity. This thesis derives coupling factors that take this structure into account.</p> |
| spellingShingle | Cavity resonators Photonics Atomic theory Quantum optics Álvarez Velásquez, JR Pushing cavity-based single photon sources to the limit: photon feedback, coherent repumping and multilayer cavities |
| title | Pushing cavity-based single photon sources to the limit: photon feedback, coherent repumping and multilayer cavities |
| title_full | Pushing cavity-based single photon sources to the limit: photon feedback, coherent repumping and multilayer cavities |
| title_fullStr | Pushing cavity-based single photon sources to the limit: photon feedback, coherent repumping and multilayer cavities |
| title_full_unstemmed | Pushing cavity-based single photon sources to the limit: photon feedback, coherent repumping and multilayer cavities |
| title_short | Pushing cavity-based single photon sources to the limit: photon feedback, coherent repumping and multilayer cavities |
| title_sort | pushing cavity based single photon sources to the limit photon feedback coherent repumping and multilayer cavities |
| topic | Cavity resonators Photonics Atomic theory Quantum optics |
| work_keys_str_mv | AT alvarezvelasquezjr pushingcavitybasedsinglephotonsourcestothelimitphotonfeedbackcoherentrepumpingandmultilayercavities |