Now showing items 1-20 of 72

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

      Sushkov, Alexander; Chisholm, N.; Lovchinsky, I.; Kubo, M.; Lo, P. K.; Bennett, Steven; Hunger, D.; Akimov, Alexey; Walsworth, Ronald Lee; Park, H.; Lukin, Mikhail D. (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 

      Yeung, T. K.; LeSage, David Anthony; Pham, Linh My; Stanwix, P. L.; Walsworth, Ronald L. (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 

      Phillips, David F.; Glenday, Alex; Dumusque, Xavier; Buchschacher, Nicolas; Cameron, Andrew Collier; Cecconi, Massimo; Charbonneau, David; Cosentino, Rosario; Ghedina, Adriano; Haywood, Raphaelle D.; Latham, David Winslow; Li, Chih-Hao; Lodi, Marcello; Lovis, Christophe; Molinari, Emilio; Pepe, Francesco; Sasselov, Dimitar D.; Szentgyorgyi, Andrew H.; Udry, Stephane; Walsworth, Ronald Lee (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 

      Childress, Lilian I.; Walsworth, Ronald Lee; Lukin, Mikhail D. (AIP Publishing, 2014)
    • Atomic-Scale Nuclear Spin Imaging Using Quantum-Assisted Sensors in Diamond 

      Ajoy, A.; Bissbort, U.; Lukin, Mikhail D.; Walsworth, Ronald Lee; Cappellaro, P. (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 

      Chen, Li-Jin; Li, Chih-Hao; Chang, Guoqing; Benedick, Andrew J.; Philips, David F.; Walsworth, Ronald L.; Kärtner, Franz X. (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 

      Phillips, David Forrest; Glenday, Alexander G.; Li, Chih-Hao; Cramer, Claire; Furesz, Gabor; Chang, Guoqing; Benedick, Andrew J.; Chen, Li-Jin; Szentgyorgyi, Andrew H.; Walsworth, Ronald L. (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 

      Stanwix, Paul L.; Pham, Linh My; Maze, Jeronimo R.; Le Sage, David Anthony; Yeung, Tsun Kwan; Cappellaro, Paola; Hemmer, Philip R.; Yacoby, Amir; Lukin, Mikhail D.; Walsworth, Ronald L. (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 

      Hong, Sungkun; Grinolds, Michael Sean; Maletinsky, Patrick; Walsworth, Ronald L.; Lukin, Mikhail D.; Yacoby, Amir (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 

      Zibrov, Sergei A.; Novikova, Irina; Phillips, David F.; Walsworth, Ronald Lee; Zibrov, Alexander S; Velichansky, Vladimir L.; Taichenachev, Alexey V.; Yudin, Valery I. (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 

      Li, Chih-Hao; Guoqing, Chang; Glenday, Alexander G.; Langellier, Nicholas Ryan; Zibrov, Alexander S; Phillips, David Forrest; Kärtner, Franz X.; Szentgyorgyi, Andrew H.; Walsworth, Ronald L. (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 ...
    • Control and local measurement of the spin chemical potential in a magnetic insulator 

      Du, Chunhui; van der Sar, Toeno; Zhou, Tony X.; Upadhyaya, Pramey; Casola, Francesco; Zhang, Huiliang; Onbasli, Mehmet C.; Ross, Caroline A.; Walsworth, Ronald; Tserkovnyak, Yaroslav; Yacoby, Amir (American Association for the Advancement of Science (AAAS), 2017-07-13)
      The spin chemical potential characterizes the tendency of spins to diffuse. Probing this quantity could provide insight into materials such as magnetic insulators and spin liquids and aid optimization of spintronic devices. ...
    • Correlative light and electron microscopy using cathodoluminescence from nanoparticles with distinguishable colours 

      Glenn, David R.; Zhang, Huidan; Kasthuri, Narayanan; Schalek, Richard L.; Lo, P. K.; Trifonov, Alexei; Park, Hongkun; Lichtman, Jeff; Walsworth, Ronald L. (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 

      Luan, Lan; Grinolds, Michael S.; Hong, Sungkun; Maletinsky, Patrick; Walsworth, Ronald L.; Yacoby, Amir (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 

      Devience, Stephen J; Walsworth, Ronald L.; Rosen, Matthew Scot (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 ...
    • Diamond-Based Magnetic Imaging with Fourier Optical Processing 

      Backlund, Mikael; Kehayias, Paull; Walsworth, Ronald (American Physical Society (APS), 2017-11-03)
      Diamond-based magnetic field sensors have attracted great interest in recent years. In particular, wide-field magnetic imaging using nitrogen-vacancy (NV) centers in diamond has been previously demonstrated in condensed ...
    • Dressed-State Resonant Coupling between Bright and Dark Spins in Diamond 

      Belthangady, Chinmay N.; Bar-Gill, N.; Pham, Linh My; Arai, K.; Le Sage, David Anthony; Cappellaro, P.; Walsworth, Ronald Lee (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 ...
    • Efficiency of Cathodoluminescence Emission by Nitrogen-Vacancy Color Centers in Nanodiamonds 

      Zhang, Huiliang; Glenn, David; Schalek, Richard; Lichtman, Jeff; Walsworth, Ronald (Wiley, 2017-04-18)
      Correlated electron microscopy and cathodoluminescence (CL) imaging using functionalized nanoparticles is a promising nanoscale probe of biological structure and function. Nanodiamonds (NDs) that contain CL‐emitting color ...
    • Efficient photon detection from color centers in a diamond optical waveguide 

      LeSage, David Anthony; Pham, Linh My; Bar-Gill, N.; Belthangady, Chinmay N.; Lukin, Mikhail D.; Yacoby, Amir; Walsworth, Ronald L. (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 

      Klein, Mason Joseph; Hohensee; Phillips, David F.; Walsworth, Ronald Lee (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 ...