Now showing items 1-20 of 65

• #### All-Optical Sensing of a Single-Molecule Electron Spin ﻿

(American Chemical Society (ACS), 2014)
We demonstrate an all-optical method for magnetic sensing of individual molecules in ambient conditions at room temperature. Our approach is based on shallow nitrogen-vacancy (NV) centers near the surface of a diamond ...
• #### Anti-Reflection Coating for Nitrogen-Vacancy Optical Measurements in Diamond ﻿

(American Institute of Physics (AIP), 2012)
We realize anti-reflection (AR) coatings for optical excitation and fluorescence measurements of nitrogen-vacancy (NV) color centers in bulk diamond by depositing quarter-wavelength thick silica layers on the diamondsurface. ...
• #### An astro-comb calibrated solar telescope to search for the radial velocity signature of Venus ﻿

(2016)
We recently demonstrated sub-m/s sensitivity in measuring the radial velocity (RV) between the Earth and Sun using a simple solar telescope feeding the HARPS-N spectrograph at the Italian National Telescope, which is ...
• #### Atom-like crystal defects: From quantum computers to biological sensors ﻿

(AIP Publishing, 2014)
• #### Atomic-Scale Nuclear Spin Imaging Using Quantum-Assisted Sensors in Diamond ﻿

(American Physical Society (APS), 2015)
Nuclear spin imaging at the atomic level is essential for the understanding of fundamental biological phenomena and for applications such as drug discovery. The advent of novel nanoscale sensors promises to achieve the ...
• #### Broadband Dispersion-Free Optical Cavities Based on Zero Group Delay Dispersion Mirror Sets ﻿

(Optical Society of America, 2010)
A broadband dispersion-free optical cavity using a zero group delay dispersion (zero-GDD) mirror set is demonstrated. In general zero-GDD mirror sets consist of two or more mirrors with opposite group delay dispersion ...
• #### Calibration of an Astrophysical Spectrograph Below 1 m/s Using a Laser Frequency Comb ﻿

(Optical Society of America, 2012)
We deployed two wavelength calibrators based on laser frequency combs (“astro-combs”) at an astronomical telescope. One astro- comb operated over a 100 nm band in the deep red (∼ 800 nm) and a second operated over a 20 nm ...
• #### Coherence of Nitrogen-Vacancy Electronic Spin Ensembles in Diamond ﻿

(American Physical Society, 2010)
We present an experimental and theoretical study of electronic spin decoherence in ensembles of nitrogen-vacancy (NV) color centers in bulk high-purity diamond at room temperature. Under appropriate conditions, we find ...
• #### Coherent, Mechanical Control of a Single Electronic Spin ﻿

(American Chemical Society (ACS), 2012)
We demonstrate coherent quantum control of a single spin driven by the motion of a mechanical resonator. The motion of a mechanical resonator is magnetically coupled to the electronic spin of a single nitrogen-vacancy ...
• #### Coherent-Population-Trapping Resonances with Linearly Polarized Light for All-Optical Miniature Atomic Clocks ﻿

(American Physical Society (APS), 2010)
We present a joint theoretical and experimental characterization of the coherent population trapping (CPT) resonance excited on the $D_1$ line of $^{87}Rb$ atoms by bichromatic linearly polarized laser light. We observe ...
• #### Conjugate Fabry–Perot Cavity Pair for Improved Astro-Comb Accuracy ﻿

(Optical Society of America, 2012)
We propose a new astro-comb mode-filtering scheme composed of two Fabry–Perot cavities (coined “conjugate Fabry–Perot cavity pair”). Simulations indicate that this new filtering scheme makes the accuracy of astro-comb ...
• #### Correlative light and electron microscopy using cathodoluminescence from nanoparticles with distinguishable colours ﻿

(Nature Publishing Group, 2012)
Correlative light and electron microscopy promises to combine molecular specificity with nanoscale imaging resolution. However, there are substantial technical challenges including reliable co-registration of optical and ...
• #### Decoherence imaging of spin ensembles using a scanning single-electron spin in diamond ﻿

(Nature Publishing Group, 2015)
The nitrogen-vacancy (NV) defect center in diamond has demonstrated great capability for nanoscale magnetic sensing and imaging for both static and periodically modulated target fields. However, it remains a challenge to ...
• #### Dependence of nuclear spin singlet lifetimes on RF spin-locking power ﻿

(Elsevier BV, 2012)
We measure the lifetime of long-lived nuclear spin singlet states as a function of the strength of the RF spin-locking field and present a simple theoretical model that agrees well with our measurements, including the ...
• #### Dressed-State Resonant Coupling between Bright and Dark Spins in Diamond ﻿

(American Physical Society, 2013)
Under ambient conditions, spin impurities in solid-state systems are found in thermally mixed states and are optically “dark”; i.e., the spin states cannot be optically controlled. Nitrogen-vacancy (NV) centers in diamond ...
• #### Efficient photon detection from color centers in a diamond optical waveguide ﻿

(American Physical Society (APS), 2012)
A common limitation of experiments using color centers in diamond is the poor photon collection efficiency of microscope objectives due to refraction at the diamond interface. We present a simple and effective technique ...
• #### Electromagnetically induced transparency in paraffin-coated vapor cells ﻿

(American Physical Society (APS), 2011)
Antirelaxation coatings in atomic vapor cells allow ground-state coherent spin states to survive many collisions with the cell walls. This reduction in the ground-state decoherence rate gives rise to ultranarrow-bandwidth ...
• #### Electromagnetically Induced Transparency with Noisy Lasers ﻿

(American Physical Society, 2009)
We demonstrate and characterize two coherent phenomena that can mitigate the effects of laser phase noise for Electromagnetically Induced Transparency (EIT): a laser-power-broadening-resistant resonance in the transmitted ...
• #### Electromagnetically induced transparency-based slow and stored light in warm atoms ﻿

(Wiley-Blackwell, 2011)
This paper reviews recent efforts to realize a high-efficiency memory for optical pulses using slow and stored light based on electromagnetically induced transparency (EIT) in ensembles of warm atoms in vapor cells. After ...
• #### Enhanced metrology using preferential orientation of nitrogen-vacancy centers in diamond ﻿

(American Physical Society (APS), 2012)
We demonstrate preferential orientation of nitrogen-vacancy (NV) color centers along two of four possible crystallographic axes in diamonds grown by chemical vapor deposition on the {100} face. We identify the relevant ...