Fabrication and Characterization of Nitrogen Vacancy Centers in Diamond Membranes for Use in Fabry-Perot Microcavities PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Fabrication and Characterization of Nitrogen Vacancy Centers in Diamond Membranes for Use in Fabry-Perot Microcavities PDF full book. Access full book title Fabrication and Characterization of Nitrogen Vacancy Centers in Diamond Membranes for Use in Fabry-Perot Microcavities by Andrew Dimock. Download full books in PDF and EPUB format.
Author: Andrew Dimock Publisher: ISBN: Category : Languages : en Pages :
Book Description
"The nitrogen vacancy (NV) center in diamond has attracted considerable attention because its electronic states combine long spin coherence times with atomic-like optical transitions in a solid-state environment. The NV- center emission consists of a coherent zero-phonon line (ZPL) transition which makes up only 4% of the total emission at cryogenic temperatures. Even with weak emission into the ZPL, the NV center has been used successfully in many groundbreaking experiments ranging from multi-qubit quantum registers to a loophole free validation of Bell's inequality. Nevertheless, the weak ZPL greatly reduces the efficiency of protocols relying on coherent photon emission, and spectral diffusion from uncontrolled local environments exacerbates the problem. The majority of the work done for this thesis was to develop a repeatable and reliable process ow - starting from a commercially available bulk diamond sample - for fabricating and characterizing individually addressable NV centers in thin diamond membranes. Such thin membranes can be incorporated into Fabry-Pérot optical cavities to enhance the relative ZPL emission. Fabry-Pérot cavities allow for the location of maximal electric field within the cavity to be overlapped with an NV center. Maximum enhancement of the ZPL is achieved if the ZPL linewidth is well within the width of the cavity mode and if the location. First, an introduction to the NV center electronic structure at room temperature and cryogenic temperatures is given. An overview of the experimental apparatus is detailed in the second chapter, followed by the ion implantation and electron irradiation process flows used for fabricating thin diamond membranes with high quality NV centers. The methods used to characterize the NV center density and measure the ZPL linewidths are outlined and the two fabrication procedures are compared with experimental data. Ion implantation membranes resulted in dense samples (0.85 NV/um^2) with linewidths averaging 450 MHz whereas the electron irradiated membranes resulted in isolated NV centers (0.05 NV/um^2) with linewidths averaging 300 MHz. This is the first demonstration of optically stable transitions in thin diamond membranes. The final chapter covers various methods for characterizing the mechanical properties of the fiber cavity mounts. Although not the ultimate fiber mount that will be used, the measurements provide insight into the motion in the cryostat and will be useful for future systems." --
Author: Andrew Dimock Publisher: ISBN: Category : Languages : en Pages :
Book Description
"The nitrogen vacancy (NV) center in diamond has attracted considerable attention because its electronic states combine long spin coherence times with atomic-like optical transitions in a solid-state environment. The NV- center emission consists of a coherent zero-phonon line (ZPL) transition which makes up only 4% of the total emission at cryogenic temperatures. Even with weak emission into the ZPL, the NV center has been used successfully in many groundbreaking experiments ranging from multi-qubit quantum registers to a loophole free validation of Bell's inequality. Nevertheless, the weak ZPL greatly reduces the efficiency of protocols relying on coherent photon emission, and spectral diffusion from uncontrolled local environments exacerbates the problem. The majority of the work done for this thesis was to develop a repeatable and reliable process ow - starting from a commercially available bulk diamond sample - for fabricating and characterizing individually addressable NV centers in thin diamond membranes. Such thin membranes can be incorporated into Fabry-Pérot optical cavities to enhance the relative ZPL emission. Fabry-Pérot cavities allow for the location of maximal electric field within the cavity to be overlapped with an NV center. Maximum enhancement of the ZPL is achieved if the ZPL linewidth is well within the width of the cavity mode and if the location. First, an introduction to the NV center electronic structure at room temperature and cryogenic temperatures is given. An overview of the experimental apparatus is detailed in the second chapter, followed by the ion implantation and electron irradiation process flows used for fabricating thin diamond membranes with high quality NV centers. The methods used to characterize the NV center density and measure the ZPL linewidths are outlined and the two fabrication procedures are compared with experimental data. Ion implantation membranes resulted in dense samples (0.85 NV/um^2) with linewidths averaging 450 MHz whereas the electron irradiated membranes resulted in isolated NV centers (0.05 NV/um^2) with linewidths averaging 300 MHz. This is the first demonstration of optically stable transitions in thin diamond membranes. The final chapter covers various methods for characterizing the mechanical properties of the fiber cavity mounts. Although not the ultimate fiber mount that will be used, the measurements provide insight into the motion in the cryostat and will be useful for future systems." --
Author: Cesar Daniel Rodriguez Rosenblueth Publisher: ISBN: Category : Languages : en Pages :
Book Description
"The nitrogen-vacancy (NV) centre in diamond is one of the most prominent diamond defect centres studied for quantum information applications. The NV centre’s long coherence times and atom-like spin-optical properties have made it one of the possible candidates for a node in a quantum network. Recent achievements include their use as a ten qubit solid-state quantum register, and the first loophole-free Bell experiment separated at km-scale distances. However, current implementations of the NV centre in cavity quantum electrodynamic (cQED) protocols are restricted due to its low emission rate (3%) into its coherent zero-phonon line (ZPL) transition as well as spectral diffusion originating from electric field noise on nearby surfaces. Coupling NV centres in diamond membranes to open Fabry-Pérot fibre microcavities offers one possible solution by enhancing the emission rate into the (ZPL) without degrading the NV centre’s optical properties.The work in this thesis is concerned with the in-situ characterization of the Fabry-Pérot cavities. By adequately characterizing the membrane-in-cavity system in situ, we hope to pave the way to maximize the achievable enhancement of the zero-phonon line emission rate of an NV centre inside the cavity. We study analytical and numerical models for the membrane-in-cavity system and analyze their regime of validity. By combining these models with transmission and reflection characterization of the system we determine the diamond thickness and length of the cavity with a resolution of 100 nm. The cavity finesse ranges between 16000 to 26000, depending on the presence of the diamond membrane and mirror termination. Finally, we expand upon the previously presented models to include surface losses and achieve a method to measure (sub-nm-rms) surface roughness and (ppm) mirror losses by measuring the cavity linewidth as a function of wavelength"--
Author: Jonathan Lee Publisher: ISBN: Category : Languages : en Pages :
Book Description
Cavity quantum electrodynamics provide a platform to form a quantum network which connects individual quantum bits (qubits) via photon. Optical cavity, a device which traps photons in a confined volume can enhance the interaction between photons and the qubits serves as fundamental building block for a quantum network. Nitrogen vacancy (NV) centers in diamond has emerged as one of the leading solid-state qubits because of its long spin coherence time and single photon emission properties at room temperature. Diamond optical micro-cavities are highly sought after for coupling with NV centers. Fabrication of optical cavities from nano-crystalline diamond film has been demonstrated previously. The quality factor (Q) of such devices was limited by the material properties of the nano-crystalline diamond film. Fabrication of single-crystal diamond photonic cavities is challenging because there is no trivial way to form thin diamond film with optical isolation. In this thesis, we describe an approach to fabricate high quality single-crystal diamond optical cavities for coupling to NV centers in diamond.
Author: Chiou-Fu Wang Publisher: ProQuest ISBN: 9780549478287 Category : Languages : en Pages : 216
Book Description
The challenge in the case of single crystal diamond is the formation of the suspended structure. Combining low energy ion implantation, homo-epitaxial diamond growth, and electrochemical etching with local electrodes, we fabricated microdisk structures and suspended cantilevers in single crystal diamond. Further improvements in the process are required to form photonic devices that are truly isolated from the substrate.
Author: Yechezkel Schlussel Publisher: ISBN: Category : Languages : en Pages : 148
Book Description
"The Nitrogen-Vacancy (NV) center in diamond is an atom-like system (defect) inside a carbon solid lattice, with the possibility of sharp spectroscopy lines, relatively long coherence times, and optical pumping, even at room temperature. This opens possibilities for utilizing this system for fundamental studies as well as technological applications. In this work we experimentally and theoretically study the physical properties of the NV system, and also utilize it as a magnetic probe in order to characterize high-Tc superconductors, an important field in its own right.Specifically, we study the physical properties of the NV center by:1. Analyzing theoretical aspects of excitation of NV with polarized microwave radiation. 2. Analyzing the spectroscopic broadening mechanisms related to the local environment of the NV in the lattice via novel two-frequency Doppler-like spectroscopy. 3. Analyzing the adiabatic criterion for the NV center under rapidly changing magnetic fields.In the second half of the thesis we describe utilizing the NV as a magnetic probe:1. We present a novel method for probing magnetic fields around zero field, a situation in which the high natural strain of a diamond hinders effective probing. 2. We describe a first characterization of a superconductor through its magnetic field. We observe the Meissner state as well as vortex pinning. 3. We describe spatial imaging (CCD) enabling maps of the magnetic field and comparing the super current to an updated theory of superconductivity. ... However, we believe that several of the topics described above are novel and warrant a publication, and this will be done in the near future. Here is a list of the publications we aim to submit:1. Excitation of NVs with polarized microwave radiation (including a difference of opinion with a previously published paper). 2. Doppler-like spectroscopy of the NV center (including a difference of opinion with a previously published paper). 3. Adiabaticity in the NV center. 4. Utilizing the NV center as a magnetic probe of near-zero fields. 5. Mapping the magnetic fields of a superconductor". -- abstract.
Author: Jeson Chen Publisher: ISBN: Category : Languages : en Pages :
Book Description
To fully exploit the capability of NV centers in diamond as magnetic sensors and quantum bits, the optimum production recipe as well as the method to enhance its optical performance has been studied in this work. The NV centers in bulk diamond were prepared by ion implantation and electron irradiation, and the optimum dose and temperature are found by comparing its optical and magnetic performance both experimentally and theoretically. In addition, the enhancement of optical performance and size characterization of NV centers in nanodiamonds will be discussed in this work.
Author: Andrew Dimock
Author: Andrew Dimock
Author: Cesar Daniel Rodriguez Rosenblueth
Author: Hanno S. Kaupp
Author: Jonathan Lee
Author: Chiou-Fu Wang
Author: Yechezkel Schlussel
Author: Maximilian Pallmann
Author: Jeson Chen
Author: Alexander Schmidt
Author: Alexander Schmidt