A5070887235- Diamond and Carbon-based Materials Research
- Neuroscience and Neural Engineering
- Advanced Memory and Neural Computing
- Advanced Fiber Laser Technologies
- Force Microscopy Techniques and Applications
- Mechanical and Optical Resonators
- Photoreceptor and optogenetics research
- Photonic and Optical Devices
- Semiconductor materials and devices
- Metal and Thin Film Mechanics
- High-pressure geophysics and materials
- Nonlinear Optical Materials Studies
- Advanced Surface Polishing Techniques
- Ion-surface interactions and analysis
- ZnO doping and properties
- EEG and Brain-Computer Interfaces
- Retinal and Macular Surgery
- Conducting polymers and applications
- Wireless Power Transfer Systems
- Analytical Chemistry and Sensors
- Thin-Film Transistor Technologies
- Nanowire Synthesis and Applications
- Magneto-Optical Properties and Applications
- Atomic and Subatomic Physics Research
- Electronic and Structural Properties of Oxides
The University of Melbourne
2014-2024
Indira Gandhi Centre for Atomic Research
2021-2023
Homi Bhabha National Institute
2021-2023
Montana Technological University
2023
RMIT University
2020
Australian College of Optometry
2020
Vision Australia
2013-2014
Swinburne University of Technology
2011
University of Tasmania
2010
We report electrical tuning by the Stark effect of excited-state structure single nitrogen-vacancy (NV) centers located $\ensuremath{\lesssim}100\text{ }\text{ }\mathrm{nm}$ from diamond surface. The zero-phonon line (ZPL) emission frequency is controllably varied over a range 300 GHz. Using high-resolution spectroscopy, we observe strengths both cycling and spin-altering transitions. Under resonant excitation, apply dynamic feedback to stabilize ZPL frequency. transition locked several...
Nanomechanical sensors and quantum nanosensors are two rapidly developing technologies that have diverse interdisciplinary applications in biological chemical analysis microscopy. For example, nanomechanical based upon nanoelectromechanical systems (NEMS) demonstrated chip-scale mass spectrometry capable of detecting single macromolecules, such as proteins. Quantum electron spins negatively-charged nitrogen-vacancy (NV) centers diamond modes nanometrology, including molecule magnetic...
Diamond is well known to possess many favourable qualities for implantation into living tissue including biocompatibility, biostability, and some applications hardness. However, conducting diamond has not, date, been exploited in neural stimulation electrodes due very low electrochemical double layer capacitance values that have previously reported. Here we present characterization of ultra-nanocrystalline grown the presence nitrogen (N-UNCD) exhibit charge injection capacity as high 163 µC...
Abstract Imaging the fields of magnetic materials provides crucial insight into physical and chemical processes surrounding magnetism has been a key ingredient in spectacular development data storage. Existing approaches using magneto-optic Kerr effect, x-ray electron microscopy have limitations that constrain further there is increasing demand for imaging characterisation phenomena real time with high spatial resolution. Here we show how magneto-optical response an array negatively-charged...
We demonstrate for the first time feasibility of all-diamond integrated optic devices over large areas using a combination photolithography, reactive ion etching (RIE) and focused beam (FIB) techniques. confirm viability this scalable process by demonstrating guidance in two-moded ridge waveguide type 1b single crystal diamond. This opens door to fabrication diamond-based optical chip integrating functional elements such as X-crossings, Y-junctions, evanescent couplers, Bragg...
The ability to manipulate nano-particles at the nano-scale is critical for development of active quantum systems.This paper presents a new technique diamond nano-crystals using scanning electron microscope, nano-manipulator and custom tapered optical fibre probes.The manipulation ~ 300 nm crystal, containing single nitrogen-vacancy centre, onto endface an demonstrated.The emission properties photon source post are in excellent agreement with those observed on original substrate.
Abstract The pixel size imposes a fundamental limit on the amount of information that can be displayed or recorded sensor. Thus, there is strong motivation to reduce down nanometre scale. Nanometre colour pixels cannot fabricated by simply downscaling current due cross talk and diffraction caused dyes pigments used as filters. Colour filters based plasmonic effects overcome these difficulties. Although different have been demonstrated at micron scale, no attempts so far filter submicron...
We examine some promising photonic structures for collecting and guiding light in bulk diamond. The aim of this work is to optimize single photon sources spin read-out from diamond color centers, specifically NV− centers. review the modeling fabrication (by focused ion beam reactive etching) solid immersion lenses, waveguides crystal cavities monolithic
Abstract Today’s electronic devices are fabricated using highly toxic materials and processes which limits their applications in environmental sensing mandates complex encapsulation methods biological medical applications. This paper proposes a fully resorbable high density bio-compatible environmentally friendly solution processable memristive crossbar arrays silk fibroin protein demonstrated bipolar resistive switching ratio of 10 4 possesses programmable device lifetime characteristics...
Recently, there has been interest in investigating diamond as a material for use biomedical implants. Diamond can be rendered electrically conducting by doping with boron or nitrogen. This led to inclusion of doped and nitrogen included elements electrodes and/or feedthroughs medical As these conductive device are not encapsulated, is need establish their clinical safety article compares the biocompatibility (BDD) films insulating poly crystalline against silicone negative control BDD sample...
Diamond has emerged as a promising platform for nanophotonic, optical, and quantum technologies. High-quality, single crystalline substrates of acceptable size are prerequisite to meet the demanding requirements on low-level impurities low absorption loss when targeting large photonic circuits. Here, we describe scalable fabrication method crystal diamond membrane windows that achieves three major goals with one method: providing high quality diamond, confirmed by Raman spectroscopy;...
High quality, ultra-thin single crystal diamond (SCD) membranes that have a thickness in the sub-micron range are of extreme importance as materials platform for photonics, quantum sensing, nano/micro electro-mechanical systems (N/MEMS) and other diverse applications. However, scalable fabrication such thin SCD is challenging process. In this paper, we demonstrate new method which enables high large size (∼4 × 4 mm) low surface roughness, strain, can be fabricated without deformations...
Retinal implants restore a sense of vision, for growing number users worldwide. Nevertheless, visual acuities provided by the current generation devices are low. The quantity information transferable to retina using existing implant technologies is limited, far below receptor cells' capabilities. Many agree that increasing density deliverable retinal prosthesis requires with stimulation electrodes both dense and numerous. This work describes new prostheses capable upscaling conveyable...
Abstract Quantum dot light‐emitting diodes (QLEDs) represent an exciting new technology that has many desirable attributes when compared to existing organic LEDs (OLEDs) including increased brightness, contrast, and response time. Solution‐based fabrication approaches have the advantage of being able produce large‐area electronic systems at reduced costs critical in applications such as large display electronics on curved surfaces low‐profile augmented reality glasses. In this paper, for...
Single crystal diamond membranes that host optically active emitters are highly attractive components for integrated quantum nanophotonics. In this work we demonstrate bottom-up synthesis of single containing germanium vacancy (GeV) color centers. We employ a lift-off technique to generate the and perform chemical vapor deposition in presence source realize situ doping. Finally, show these suitable engineering photonic resonators such as microdisk cavities with quality factors ∼1500. The...
Safe wireless power transfer is an essential requirement for biomedical implants. Emerging technologies are becoming smaller, less invasive, and consume power. Moreover, stent-based devices being recognized as a minimally invasive alternative to traditional surgery. Hence, the idea of using body stent receiving element increasingly attractive. The objective this paper analyze two near-field methods devices, viz., inductive capacitive coupling. used lumped modeling, ac circuit theory,...
In this paper, we propose a scalable approach toward all-printed high-performance metal oxide thin-film transistors (TFTs), using high-resolution electrohydrodynamic (EHD) printing process. Direct EHD micropatterning of TFTs is based on diverse precursor solutions to form semiconducting materials (In2O3, In-Ga-ZnO (IGZO)), conductive (Sn-doped In2O3 (ITO)), as well aluminum (Al2O3) gate dielectric at low temperatures. The fully printed TFT devices exhibit excellent electron transport...
Hydrogenated diamond possesses a unique surface conductivity as result of transfer doping by acceptors. Yet, despite being extensively studied for the past two decades, little is known about system at low temperature, particularly whether two-dimensional hole gas forms surface. Here we report that (100) diamond, when functionalized with hydrogen, supports p-type spin-3/2 spin–orbit interaction 9.74 ± 0.1 meV through observation weak antilocalization effects in magneto-conductivity...