The unique emission properties of single-walled carbon nanotubes are attractive for achieving increased functionality in integrated photonics. In addition to being room-temperature telecom-band emitters that can be directly grown on silicon, they ideal coupling nanoscale photonic structures. Here we report high-efficiency individual air-suspended silicon crystal nanobeam cavities. Photoluminescence images dielectric- and air-mode cavities reflect their distinctly different mode profiles show...

A search for solar axions has been performed using an axion helioscope which is equipped with a 2.3m-long 4T superconducting magnet, gas container to hold dispersion-matching gas, PIN-photodiode X-ray detectors, and telescope mount mechanism track the sun. mass region around m_a = 1eV was newly explored. From absence of any evidence, analysis sets limit on axion-photon coupling constant be g < 5.6-13.4x10^{-10} GeV^{-1} 0.84

We demonstrated the strong coupling between a one-dimensional photonic crystal nanobeam cavity and single quantum dot (QD). Thanks to high quality factor (∼25 000) with small mode volume [0.38×(n/λ)3] of cavity, an anticrossing behavior vacuum Rabi splitting 226 μeV was observed. The ratio QD-cavity strength decay rate, which is figure merit optical applications, estimated 2.1. This highest value among any QD-based electrodynamics systems reported so far.

Acoustically induced dressed states of long-lived erbium ions in a crystal are demonstrated. These formed by rapid modulation two-level systems via strain surface acoustic waves whose frequencies exceed the optical linewidth ion ensemble. Multiple sidebands and reduction their intensities appearing near evidence strong interaction between ions. This development allows for on-chip control paves way to highly coherent hybrid quantum with telecom photons, phonons, electrons.

Abstract We report the design, fabrication and optical characterization of silicon nanophotonic waveguides on an erbium doped crystal. The waveguide allows for efficient addressing ions embedded near crystal surface. employed transfer printing method to assemble heterogeneous photonic structure in a simple pick-and-place manner. observed coupling emission from into telecommunication wavelength band. developed methodology opens way functional hybrid quantum devices mediating between photons,...

This work investigates the behavior of an AlGaAs/GaAs piezoelectric nonlinear MEMS oscillator exhibiting a 1:3 internal resonance. The device is explored in open-loop configuration, i.e., as driven resonator, where depending on drive conditions we observe energy transfer between first and third modes, emergence supercritical Hopf limit cycles. We examine dependence these bifurcations oscillator's frequency amplitude reproduce observed using system nonlinearly coupled equations which show...

Strong light matter interactions between semiconductor quantum dots and optical micro/nanocavities are useful resources for developing information processing devices exploring diverse phenomena. In pursuit of better device performances novel physics, it is desirable to achieve a larger coupling constant the dot cavity while keeping high coherence coupled system. this letter, we report observation large vacuum Rabi splitting ∼328 μeV using single InAs embedded in GaAs-based H0 photonic...

Strain-mediated interaction between phonons and telecom photons is demonstrated using excited states of erbium ions embedded in a mechanical resonator. Owing to the extremely long-lived nature rare-earth ions, dissipation rate optical resonance falls below that one. Thus, ``reversed regime'' achieved frequency region. We experimentally demonstrate an optomechanical coupling ${g}_{0}=2\ensuremath{\pi}\ifmmode\times\else\texttimes\fi{}21.7\text{ }\text{ }\mathrm{Hz}$, numerically reveal causes...

We report the observation of vacuum Rabi splitting a single quantum emitter by measuring its direct spontaneous emission into free space. use semiconductor dot inside photonic crystal nanocavity, in conjunction with an appropriate cavity design and filtering polarizer aperture, enabling extraction inherently weak emitter's signal. The spectra exhibit clear differences from those measured detecting photon leakage. Moreover, we observe asymmetric spectrum induced interference between detection...

Abstract The hybridization of semiconductor optoelectronic devices and nanomechanical resonators provides a new class optomechanical systems in which mechanical motion can be coupled to light without any optical cavities. Such cavity-less interconnect photons, phonons electrons (holes) highly integrable platform, opening up the development functional integrated devices. Here we report on modulation-doped heterostructure–cantilever hybrid system, realizes efficient transduction through...

We demonstrated a nearly impedance-matched high-overtone bulk acoustic resonator (HBAR) operating at super high frequency ranges using an epitaxial AlN piezoelectric layer directly grown on conductive SiC cavity substrate with no metal insertion. The small impedance mismatch was verified from the variation in free spectral range (FSR); experimentally obtained FSR spectra were greatly reproduced Mason model. Broadband phonon modes up to K-band (26.5 GHz) achieved thickness of 200 nm. figure...

We theoretically and experimentally investigated a system composed of mixture different-sized quantum dots involving optical near-field interactions to effectively induce excitation transfer. demonstrated that the ratio number smaller larger ones can be optimized using density-matrix formalism so excitons generated in are efficiently transferred ones. also describe experimental demonstrations based on 2 nm- 2.8 nm-diameter CdSe/ZnS dispersed surface silicon photodiode, where increase induced...

We numerically and experimentally investigate strain-induced coupling between dark bright excitons its dynamic control using a gallium arsenide (GaAs) micromechanical resonator. Uniaxial strain induced by the mechanical resonance efficiently detunes exciton energies modulates strength via deformation potential in GaAs. This allows optical access to long-lived states without any external electromagnetic field. field-free approach could be expanded wide range of solid-state materials, leading...

We demonstrate efficient extraction of a single InAs quantum dot spontaneous emission through an air-suspended waveguide to which photonic crystal nanobeam cavity is coupled. First, the into mode enhanced due high Purcell effect arising from large quality factor and small volume mode. Second, photons can be efficiently transferred guided by optimizing design structure that exhibits coupling rate between two modes. This configuration has lead observation efficiency ($79%$) waveguide....

We have searched for solar hidden photons in the eV energy range using a dedicated photon detector. The detector consisted of parabolic mirror with diameter 500mm and focal length 1007mm installed vacuum chamber, photomultiplier tube at its point. was attached to Tokyo axion helioscope, Sumico which has mechanism track sun. From result measurement, we found no evidence existence set limit on photon-hidden mixing parameter \chi depending mass m_{\gamma '}.

The near infrared (NIR) fluorescence enhancement by local surface plasmon resonanoce from arrayed gold (Au) nanoblocks was investigated NIR fluorescent dyes, IR780, immobilized in hydrophobic DNA thin film on glass substrates, to clarify the gap mode effect enhancement. In substrate with Dimer type Au nanoblock arrangement, average total intensity larger 10.0, 2.4, and 12.4 times for non-polarized, P- S- polarization as compared that a alone, respectively. These findings suggested of...

Abstract Fluorescence intensity of near infrared dyes immobilized in hydrophobic DNA thin film spin-coated on glass substrates with regularly arranged gold (Au) nanoblocks was about 2.5 times larger than that without Au nanoblocks, strongly suggesting the fluorescence enhanced by increased electric field excitation light due to local plasmon resonance nanoblocks.

Simultaneous control of multiple mechanical modes is demonstrated in AlGaAs/GaAs resonators by an optomechanical active feedback due to the photothermal stress. Four can be amplified with a single loop, which formed combination optical detector, electrical delay line, and source. The polarities are tailored through electric enables individual linewidths each mode. Linewidth narrowing damping will used for improving detection sensitivity sensor arrays controlling their ring-down speed.

Evanescent coupling between a high-Q silica optical microbottle and GaAs electromechanical resonator is demonstrated. This offers an opto-electro-mechanical system which possesses both cavity-enhanced sensitivity electrical controllability of the mechanical motion. Cooling heating mode are demonstrated based on optomechanical detection via radiation pressure feedback piezoelectric effect. evanescent approach allows for individual design optical, mechanical, systems, could lead to highly...

We design and demonstrate a photonic crystal nanobeam cavity with Q factor controllable by micro-electro-mechanical system (MEMS). The is evanescently coupled to an adjacent waveguide, its controlled electro-mechanically adjusting the gap distance between them. experimentally control of from 2,250 2,750, applying voltage 0 11 V.

We report an observation of phononic Schwinger angular momenta, which fully represent twomode states in a micromechanical resonator. This is based on simultaneous optical detection the mechanical response at sum and difference frequency two modes. A post-selection process for measured signals allows us to extract component momenta. It also enables conditionally prepare two-mode squeezed (correlated) from randomly excited (uncorrelated) state. The momenta could be extended high-dimensional...

Strong parametric mode coupling in mechanical resonators is demonstrated at room temperature by using the photothermal effect thin membrane structures. Thanks to large stress modulation laser irradiation, rate of modes, defined as half splitting, reaches 2.94 kHz, which an order magnitude larger than electrically induced coupling. This exceeds damping rates and results strong regime, a signature coherent interaction. Room-temperature will enable us manipulate motion practical operation...

The polarization dependence of excitation light for fluorescence enhancement near-infrared dyes immobilized in hydrophobic DNA thin film on glass substrates with regularly arranged Au nanoblocks was investigated. factor S-polarized about 1.2 to 1.5 times as large that P-polarized excitation. contributed the plasmon band both horizontal and vertical direction nanoblocks. corresponds short axis height which has absorption visible region did not contribute IR780. When array IR780 were...

The Raman spectroscopy of pharmaceutical cocrystals based on caffeine and oxalic acid in nanosized pores mesoporous silica has been demonstrated at various molar amounts. peak shifts molecules express the existence silica. amount dependence describes that cocrystallized surface piled up layer by layer. This is first report shows a powerful tool to observe synthesis incorporated results indicate way control size nanometer scale, which will provide higher bioavailability pharmaceuticals.