A5014072142- Diamond and Carbon-based Materials Research
- Advanced Fiber Laser Technologies
- Quantum and electron transport phenomena
- Quantum Information and Cryptography
- Force Microscopy Techniques and Applications
- Semiconductor Quantum Structures and Devices
- GaN-based semiconductor devices and materials
- Spectroscopy Techniques in Biomedical and Chemical Research
- High-pressure geophysics and materials
- Spectroscopy and Chemometric Analyses
- Crystallization and Solubility Studies
- Metal and Thin Film Mechanics
- Graphene research and applications
- Nanowire Synthesis and Applications
- Mechanical and Optical Resonators
- Quantum Computing Algorithms and Architecture
- Semiconductor materials and devices
- Quantum optics and atomic interactions
- Spectroscopy and Laser Applications
- Solid State Laser Technologies
- X-ray Diffraction in Crystallography
- Molecular Spectroscopy and Structure
- Electronic and Structural Properties of Oxides
- Optical Imaging and Spectroscopy Techniques
- Plasmonic and Surface Plasmon Research
University of Pennsylvania
2017-2025
Nokia (United States)
2025
California University of Pennsylvania
2022
Princeton University
2013-2015
Oregon State University
1977
Quantum emitters such as the diamond nitrogen-vacancy (NV) center are basis for a wide range of quantum technologies. However, refraction and reflections at material interfaces impede photon collection, emitters' atomic scale necessitates use free space optical measurement setups that prevent packaging devices. To overcome these limitations, we design fabricate metasurface composed nanoscale pillars acts an immersion lens to collect collimate emission individual NV center. The metalens...
Milled nanodiamonds containing nitrogen-vacancy (NV) centers are nanoscale quantum sensors that form colloidal dispersions. However, variations in their size, shape, and surface chemistry limit the ability to position individual statistically study properties affect optical characteristics. Here, we present a scalable strategy ordered arrays of using capillary-driven, template-assisted self-assembly. We demonstrate precise spatial arrangement isolated with diameters below 50 nm across...
Photon-emission-correlation spectroscopy is an indispensable tool for the study of atoms, molecules, and, more recently, solid-state quantum defects. In systems, its most common use as indicator single-photon emission, a key property technology. Beyond purity emitter, however, photon-correlation measurements can provide wealth information that reveal details about electronic structure and optical dynamics are hidden by other techniques. This tutorial presents standardized framework using...
Hexagonal boron nitride (h-BN) hosts pure single-photon emitters that have shown evidence of optically detected electronic spin dynamics. However, the electrical and chemical structures these addressable spins are unknown, nature their spin-optical interactions remains mysterious. Here, we use time-domain optical microwave experiments to characterize a single emitter in h-BN exhibiting room temperature magnetic resonance. Using dynamical simulations, constrain quantify transition rates...
Combining experimental techniques with ab initio calculations, quantum emitters in h-BN are shown to exhibit pure single-photon emission, and a model for their electronic structure optical dynamics is constructed
Abstract As quantum networks expand and are deployed outside research laboratories, a need arises to design integrate compact control electronics for each memory node. It is essential understand the performance requirements such systems, especially concerning tolerable levels of noise, since these specifications dramatically affect system's complexity cost. Here, using an approach that can be easily generalized across quantum‐hardware platforms, case study based on nitrogen‐vacancy (NV)...
Mid-infrared transmission spectroscopy using broadband mid-infrared or Quantum Cascade laser sources is used to predict glucose concentrations of aqueous and serum solutions containing physiologically relevant amounts (50-400 mg/dL). We employ partial least squares regression generate a calibration model subset the spectra taken from new spectra. Clinically accurate measurements with respect Clarke error grid were made for as low 30 mg/dL, regardless background solvent. These results are an...
This is a pedagogical article cited in the foregoing research note, quant-ph/9911050
We report the realization of quantum cascade (QC) light emission in III-nitride material system, designed with effective interface grading (EIG). EIG induces a continuous transition between wells and barriers confinement, which alters eigenstate system even delocalizes states higher energy. Fully transverse-magnetic spontaneous is observed from fabricated QC structure, center wavelength ∼4.9 μm full width at half maximum ∼110 meV, both excellent agreement theoretical predictions. A...
Quantum cascade (QC) detectors in the GaN/AlxGa1−xN material system grown by metal organic chemical vapor deposition are designed, fabricated, and characterized. Only two compositions, i.e., GaN as wells Al0.5Ga0.5N barriers used active layers. The QC operates around 4 μm, with a peak responsivity of up to ∼100 μA/W detectivity 108 Jones at background limited infrared performance temperature 140 K.
Nanodiamonds containing nitrogen-vacancy (NV) centers can serve as colloidal quantum sensors of local fields in biological and chemical environments. However, nanodiamond surfaces are challenging to modify without degrading their stability or the NV center's optical spin properties. We present a simple general method coat nanodiamonds with thin emulsion layer that preserves features, maintains stability, provides functional groups for subsequent cross-linking click-chemistry conjugation...
Solid-state electron spins are key building blocks for emerging applications in quantum information science, including computers, communication links, and sensors. These solid-state mainly controlled using complex microwave pulse sequences, which typically generated benchtop electrical instruments. Integration of the required electronics will enable realization a scalable low-power compact optically addressable system. Here, we report an integrated reconfigurable control system, is used to...
Photon emission correlation spectroscopy is an indispensable tool for the study of atoms, molecules, and, more recently, solid-state quantum defects. In systems, its most common use as indicator single-photon emission, a key property technology. Beyond emitter's purity, however, photon measurements can provide wealth information that reveal details about electronic structure and optical dynamics are hidden by other techniques. This tutorial presents standardized framework using to emitters,...
Nuclear quadrupolar resonance (NQR) spectroscopy reveals chemical bonding patterns in materials and molecules through the unique coupling between nuclear spins local fields. However, traditional NQR techniques require macroscopic ensembles of nuclei to yield a detectable signal, which precludes study individual obscures molecule-to-molecule variations due perturbations or deformations. Optically active electronic spin qubits, such as nitrogen-vacancy (NV) center diamond, facilitate detection...
We demonstrate dual-frequency stabilization of a hybrid-integrated multi-channel laser to an integrated high Q-factor silicon nitride (SiN) coil resonator with more than 40 dB frequency noise suppression. The locked channels are utilized for proof-of-concept fiber sensing experiment.
We demonstrate dual-wavelength distributed acoustic sensing over 37 km of standard single-mode fiber using $\phi$-OFDR, utilizing a scalable hybrid-integrated laser chip frequency-locked to high-Q integrated SiN coil resonator.
Nuclear quadrupolar resonance (NQR) spectroscopy reveals chemical bonding patterns in materials and molecules through the unique coupling between nuclear spins local fields. However, traditional NQR techniques require macroscopic ensembles of nuclei to yield a detectable signal, which obscures molecule-to-molecule variations. Solid-state spin qubits, such as nitrogen-vacancy (NV) center diamond, facilitate detection control individual their magnetic couplings. Here, we use NV centers perform...
As quantum networks expand and are deployed outside research laboratories, a need arises to design integrate compact control electronics for each memory node. It is essential understand the performance requirements such systems, especially concerning tolerable levels of noise, since these specifications dramatically affect system's complexity cost. Here, using an approach that can be easily generalized across quantum-hardware platforms, we present case study based on nitrogen-vacancy (NV)...
Hexagonal boron nitride (h-BN) hosts pure single-photon emitters that have shown evidence of optically detected electronic spin dynamics. However, the electrical and chemical structure these addressable spins is unknown, nature their spin-optical interactions remains mysterious. Here, we use time-domain optical microwave experiments to characterize a single emitter in h-BN exhibiting room temperature magnetic resonance. Using dynamical simulations, constrain quantify transition rates model,...
Solid-state electron spins are key building blocks for emerging applications in quantum information science, including computers, communication links, and sensors. However, solid-state controlled using complex microwave pulse sequences, which typically generated benchtop electrical instruments. Integration of the required electronics will enable realization a scalable low-power compact optically addressable system. Here, we report an integrated reconfigurable control system, is used to...
Predictions of glucose concentrations throughout the physiological range are obtained in vitro using partial least squares regression analysis mid-infrared transmission spectra. Concentrations as low 30 mg/dL predicted to clinical accuracy.