Purcell enhancement of the silicon T centre

Resource type
Thesis type
(Thesis) M.Sc.
Date created
2022-12-09
Authors/Contributors
Author: Stott, Leea
Abstract
Quantum information technologies will be able to perform certain tasks that are intractable on classical computers, including chemically accurate simulations of heavy elements and large molecules, teleporting information, and cracking many modern cryptographic standards. While small scale demonstrations of these novel tasks exist, quantum processors require further scale up to realize the full potential of these applications. One way to scale quantum processors is through the use of quantum networks. Quantum networks allow for modularity by connecting multiple systems together using photons. To form a quantum network, one can make use of a spin-photon interface which stores quantum information in solid state spins and achieves connectivity via photons. Many spin photon platforms depend on the use of optical cavities to achieve the rates of entanglement required to enable modularity. This is because optical cavities improve photon indistinguishability, a prerequisite for many entanglement schemes, by Purcell-enhancing quantum emitters. Purcell enhancements of spin-photon interfaces have been demonstrated to date, but never for qubits native to silicon. Here we present the first report of Purcell enhancement of the T centre, a silicon-native spin-photon qubit. We do so by designing and fabricating a one-dimensional photonic crystal cavity with a quality factor of 40 000, mode volume of 2(λ/n)^3 and resonant wavelength near the T centre optical transition. We observe an ensemble of cavity-coupled T centres by way of photoluminescence excitation spectroscopy and excited state lifetime measurements. We measure optical decay rate enhancements up to 9 and estimate a Purcell factor of 136. These results are an important step towards photonic engineering of the T centre for optical networks.
Document
Extent
66 pages.
Identifier
etd22269
Copyright statement
Copyright is held by the author(s).
Permissions
This thesis may be printed or downloaded for non-commercial research and scholarly purposes.
Supervisor or Senior Supervisor
Thesis advisor: Simmons, Stephanie
Language
English
Member of collection
Attachment Size
etd22269.pdf 44.83 MB