We study the elastic deformation of few layers (5 to 25) thick freely suspended MoS2 nanosheets by means a nanoscopic version bending test experiment, carried out with tip an atomic force microscope. The Young's modulus these is extremely high (E = 0.33 TPa), comparable that graphene oxide, and deflections are reversible up tens nanometers.

Nanoscale resonators that oscillate at high frequencies are useful in many measurement applications. We studied a high-quality mechanical resonator made from suspended carbon nanotube driven into motion by applying periodic radio frequency potential using nearby antenna. Single-electron charge fluctuations created modulations of the resonance frequency. A quality factor exceeding 10^5 allows detection shift caused addition single-electron on nanotube. Additional evidence for strong coupling...

We have observed the transversal vibration mode of suspended carbon nanotubes at millikelvin temperatures by measuring single-electron tunneling current. The are actuated contact-free radio frequency electric field a nearby antenna; mechanical resonance is detected in time-averaged current through nanotube. Sharp, gate-tunable resonances due to bending nanotube observed, combining frequencies up ν0 = 350 MHz with quality factors above Q 105, much higher than previously reported results on...

We have measured the mechanical properties of few-layer graphene and graphite flakes that are suspended over circular holes. The spatial profile flake’s spring constant is with an atomic force microscope. bending rigidity tension in membranes extracted by fitting a continuum model to data. For down eight layers, both parameters show strong thickness dependence. predict fundamental resonance frequencies these nanodrums gigahertz range based on tension.

We have used a suspended carbon nanotube as frequency mixer to detect its own mechanical motion. A single gate-dependent resonance is observed, which we attribute the fundamental bending mode vibration of nanotubes. continuum model fit gate dependence frequency, from obtain values for residual and gate-induced tension in nanotube. This analysis shows that nanotubes our devices no slack that, by applying voltage, can be tuned regime without strain where it behaves vibrating string under tension.

A theoretical and experimental investigation is presented on the intermodal coupling between flexural vibration modes of a single clamped-clamped beam. Nonlinear allows an arbitrary mode to be used as self-detector for amplitude another mode, presenting method measure energy stored in specific resonance mode. Experimentally observed complex nonlinear dynamics coupled are quantitatively captured by model which couples via beam extension; same mechanism responsible well-known Duffing...

Synchronization in oscillatory systems is a frequent natural phenomenon and becoming an important concept modern physics. Nanomechanical resonators are ideal for studying synchronization due to their controllable oscillation properties engineerable nonlinearities. Here we demonstrate of two nanomechanical oscillators via photonic resonator, enabling optomechanical between mechanically isolated resonators. Optical backaction gives rise both reactive dissipative coupling the mechanical...

We fabricate freely suspended nanosheets of MoS2 which are characterized by quantitative optical microscopy and high resolution friction force microscopy. study the elastic deformation using an atomic microscope. The Young's modulus initial pre-tension determined performing a nanoscopic version bending test experiment. sheets show elasticity extremely (0.30 TPa, 50% larger than steel). These results make them potential alternative to graphene in applications requiring flexible semiconductor...

Electromagnetically induced transparency has great theoretical and experimental importance in many physics subjects, such as atomic physics, quantum optics, more recent cavity optomechanics. Optical delay is the most prominent feature of electromagnetically transparency, optomechanics optical limited by mechanical dissipation rate sideband-resolved modes. Here we demonstrate a cascaded scheme leveraging parametric phonon-phonon coupling multimode optomechanical system, where low damping mode...

We have studied the gate and temperature dependence of molecular junctions containing sulfur end-functionalized tercyclohexylidenes. At low temperatures we find temperature-independent transport; at above 150 K current increases exponentially with increasing temperature. Over entire range (10−300 K), for different voltages, a simple toy model transport through single level describes experimental results. In model, arises from Fermi distribution in leads three-parameter fit extract position...

Abstract Quantum information processing holds great promise for communicating and computing data efficiently. However, scaling current photonic implementation approaches to larger system size remains an outstanding challenge realizing disruptive quantum technology. Two main ingredients of processors are interference single-photon detectors. Here we develop a hybrid superconducting-photonic circuit show how these elements can be combined in scalable fashion on silicon chip. We demonstrate the...

We demonstrate an optomechanical phase shifter. By electrostatically deflecting the nanofabricated mechanical structure, effective index of a nearby waveguide is changed and resulting shift measured using integrated Mach-Zehnder interferometer. Comparing to thermo-optical shifters, our device does not consume power in static operation also it can operate over large frequency, wavelength, ranges. Operation MHz range sub-$\mu$s pulses are demonstrated.

We demonstrate a new optomechanical device system which allows highly efficient transduction of femtogram nanobeam resonators. Doubly clamped nanomechanical resonators with mass as small 25 fg are embedded in high-finesse two-dimensional photonic crystal nanocavity. Optical the fundamental flexural mode around 1 GHz was performed at room temperature and ambient conditions, an observed displacement sensitivity 0.94 fm/Hz1/2. Comparison measurements from symmetric asymmetric double-beam...

Incorporation of a third, gate electrode in the device geometry molecular junctions is necessary to identify transport mechanism. At present, most popular technique fabricate three-terminal devices makes use electromigration. Although it statistical process, we show that control over gap resistance can be obtained. A detailed analysis current–voltage characteristics gaps without molecules, however, shows they reveal features mistakenly attributed transport. This observation raises questions...

We demonstrate broadband, low loss optical waveguiding in single crystalline GaN grown epitaxially on c-plane sapphire wafers through a buffered metal-organic chemical vapor phase deposition process. High Q microring resonators are realized near infrared, and visible regimes with intrinsic quality factors exceeding 50 000 at all the wavelengths we studied. TEM analysis of etched waveguide reveals growth etch-induced defects. Reduction these defects improved material device processing could...

The mechanical properties of thin films can vary significantly due to variations in the deposition process. Monitoring these is essential when, e.g., engineering micro-mechanical devices. Established methods such as wafer bending and bulge testing provide only average values for entire or impose constraints on sample fabrication Therefore, a method efficiently characterize locally with simple desirable. In this study, we determine stress direct-current magnetron-sputtered aluminum nitride...

The design, fabrication, and detailed calibration of essential building blocks towards fully integrated linear-optics quantum computation are discussed. Photonic devices made from silicon nitride rib waveguides, where measurements on ring resonators show small propagation losses. Directional couplers designed to be insensitive fabrication variations. Their offset coupling lengths measured, as well the phase difference between transmitted reflected light. With careful calibrations, insertion...

The maximum amplitude of mechanical oscillators coupled to optical cavities is studied both analytically and numerically. backaction on the resonator enables self-sustained oscillations whose limit cycle set by dynamic range cavity. attainable phonon generation quantum efficiency process are for unresolved resolved cavities. Quantum efficiencies far exceeding one found in sideband regime where low. On other hand, system. Finally, role nonlinearities addressed.