A5075396122- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Quantum Information and Cryptography
- Advanced Thermodynamics and Statistical Mechanics
- Strong Light-Matter Interactions
- Quantum, superfluid, helium dynamics
- Spectroscopy and Quantum Chemical Studies
- Experimental and Theoretical Physics Studies
- Advanced Fiber Laser Technologies
- Plasmonic and Surface Plasmon Research
- Quantum optics and atomic interactions
- Photonic Crystals and Applications
- Quantum and electron transport phenomena
- Physics of Superconductivity and Magnetism
- Photorefractive and Nonlinear Optics
- Advanced MEMS and NEMS Technologies
- Force Microscopy Techniques and Applications
- Field-Flow Fractionation Techniques
- Photochemistry and Electron Transfer Studies
- Molecular Junctions and Nanostructures
- Topological and Geometric Data Analysis
- Magneto-Optical Properties and Applications
- Magnetic properties of thin films
- Inertial Sensor and Navigation
- Cell Image Analysis Techniques
Max Planck Institute for the Science of Light
2019-2023
Yale University
2014-2019
Osipyan Institute of Solid State Physics RAS
2012-2017
Moscow Institute of Physics and Technology
2010
In this Letter we study a system consisting of two nearly degenerate mechanical modes that couple to single mode an optical cavity. We show coupling leads complete (99.5%) hybridization the into bright experiences strong optomechanical interactions and dark almost no interactions. use transfer energy between with 40% efficiency.
We describe measurements of the motional sidebands produced by a mechanical oscillator (with effective mass 43 ng and resonant frequency 705 kHz) that is placed in an optical cavity cooled close to its quantum ground state. The red blue (corresponding Stokes anti-Stokes scattering) from single laser beam are recorded simultaneously via heterodyne measurement. oscillator's mean phonon number $\overline{n}$ inferred ratio sidebands, reaches minimum value $0.84\ifmmode\pm\else\textpm\fi{}0.22$...
Cavity optomechanics offers powerful methods for controlling optical fields and mechanical motion. A number of proposals have predicted that this control can be extended considerably in devices where multiple cavity modes couple to each other via the motion a single oscillator. Here we study dynamical properties such multimode optomechanical device, which coupling between results from mechanically-induced avoided crossings cavity's spectrum. Near find spring shows distinct features arise...
We measure the quantum fluctuations of a single acoustic mode in volume superfluid He that is coupled to an optical cavity. Specifically, we monitor Stokes and anti-Stokes light scattered by standing wave confined cavity mirrors. The intensity these signals (and their cross-correlation) exhibits characteristic features wave's zero-point motion backaction intracavity light. While are also observed vibrations solid objects ultracold atomic gases, observation opens possibility exploiting...
We report on cryogenic coupling of organic molecules to ring microresonators obtained by looping sub-wavelength waveguides (nanoguides). discuss fabrication and characterization the chip-based nanophotonic elements which yield resonator finesse in order 20 when covered molecular crystals. Our observed extinction dips from single reach 22%, consistent with expected Purcell enhancements up 11 folds. Future efforts will aim at efficient a handful via their interaction microresonator mode,...
Vibrational levels of the electronic ground states in dye molecules have not been previously explored at a high resolution solid matrices. We present new spectroscopic measurements on single polycyclic aromatic dibenzoterrylene embedded an organic crystal made para-dichlorobenzene. To do this, we use narrow-band continuous-wave lasers and combine spectroscopy methods based fluorescence excitation stimulated emission depletion to assess individual vibrational linewidths state ∼30 MHz dictated...
We studied the rotational and translational diffusion of a single gold nanorod linked to supported lipid bilayer with ultrahigh temporal resolution two microseconds. By using home-built polarization-sensitive dark-field microscope, we recorded particle trajectories lateral precision 3 nm 4°. The large number trajectory points in our measurements allows us characterize statistics unprecedented detail. Our data show apparent signatures anomalous such as sublinear scaling mean-squared angular...
We present efficient evanescent coupling of single organic molecules to a gallium phosphide (GaP) subwavelength waveguide (nanoguide) decorated with microelectrodes. By monitoring their Stark shifts, we reveal that the coupled experience fluctuating electric fields. analyze spectral dynamics different over large range optical powers in nanoguide show these fluctuations are light-induced and local. A simple model is developed explain our observations based on activation charges at an...
We introduce an image transform designed to highlight features with high degree of radial symmetry for identification and subpixel localization particles in microscopy images. The is based on analyzing pixel value variations angular directions. compare the performance this algorithm other common methods or mirror (such as fast transform, orientation alignment XCorr, quadrant interpolation), using both synthetic experimentally obtained data. find that all cases it achieves same lower error,...
Presented in this paper are measurements of an optomechanical device which various acoustic modes a sample superfluid helium couple to fiber-based optical cavity. In contrast with recent work on the paraxial mode confined by cavity mirrors, we focus specifically associated surrounding This provides framework for understanding how depend geometry. The observed using technique optomechanically induced transparency/amplification. coupling these is found be predominantly photothermal.
We measure the quantum efficiency (QE) of individual dibenzoterrylene (DBT) molecules embedded in p-dichlorobenzene at cryogenic temperatures. To achieve this, we combine two distinct methods based on maximal photon emission and power required to saturate zero-phonon line compensate for uncertainties some key system parameters. find that outcomes approaches are good agreement reasonable values parameters involved, reporting a large fraction with QE above 50%, exceeding 70%. Furthermore,...
Integrated photonic circuits offer a promising route for studying coherent cooperative effects of controlled collection quantum emitters. However, spectral inhomogeneities, decoherence, and material incompatibilities in the solid state make this nontrivial task. Here, we demonstrate efficient coupling pair Fourier-limited organic molecules embedded polyethylene film to TiO 2 microdisc resonator on glass chip. Moreover, tune resonance frequencies emitters with respect that microresonator by...
We consider random nondirected networks subject to dynamics conserving vertex degrees and study, analytically numerically, equilibrium three-vertex motif distributions in the presence of an external field $h$ coupled one motifs. For small $h$, numerics is well described by ``chemical kinetics'' for concentrations motifs based on law mass action. larger a transition into some trapped state occurs Erd\ifmmode \mbox{\H{o}}\else \H{o}\fi{}s-R\'enyi networks. explain existence employing notion...
The small cross-section of Raman scattering poses a great challenge for its direct study at the single-molecule level. By exploiting high Franck-Condon factor common-mode resonance, choosing large vibrational frequency difference in electronic ground and excited states operating $T<2\phantom{\rule{0.16em}{0ex}}\mathrm{K}$, we succeed driving coherent stimulated transition individual molecules. We observe model spectral splitting that serves as characteristic signature phenomenon hand. Our...