Toward a practical light source for two-photon bioimaging, we have generated kilowatt peak power of 0.77 mum wavelength and 5 ps optical pulse via second-harmonic generation the amplified output from gain-switched 1.55 semiconductor laser. This compact scheme stable optical-pulse-source has been successfully used fluorescence bioimaging actin filaments in PtK2 cells.

A bstract We propose a formulation of black hole thermodynamics that incorporates the notions heat and work, based on in quantum theory AdS/CFT correspondence. First, for coupled holographic CFTs, we define coarse-graining procedure adopting principle maximum entropy. Employing this approach, when system is divided into target thermal baths, formulate first second laws, as well fundamental thermodynamic relation. Then, by translating resulting AdS gravity language, construct framework...

A bstract Photon spheres are the characteristic of general black holes, thus a suitable touchstone for emergence gravitational spacetime in AdS/CFT correspondence. We provide spectral analysis an AdS Schwarzschild hole near its photon sphere. find that quasinormal modes sphere reflect boundary, resulting peculiar pattern. Our large angular momentum owes to analogue solvable Schrödinger equations such as inverted harmonic oscillator and Pöschl-Teller model, with Dirichlet boundary condition....

A bstract It has long been thought that a highly excited string can be regarded as black hole: the correspondence principle between strings and hole, while recent studies found holes are characterized by chaos. This suggests source of hole chaoticity. We study chaoticity amplitude where tachyon is scattered string. Our strategy to extract chaos in generalization transient analysis for classical scattering. look fractal structure plots incoming/outgoing scattering angles, outgoing angle...

Composite systems of liquid crystals (LCs) and polymers have been extensively studied in various forms such as polymer-dispersed LCs polymer-stabilised LCs. Blending is an effective approach to design functional materials with stimuli responsiveness durability. Here, we show the development a novel composite material crosslinked azobenzene LC polymer (PAzo) poly(dimethylsiloxane) (PDMS) aiming at improvement photomobile mechanical properties. The films were prepared by photopolymerisation...

We study a resurgence structure of quantum field theory with phase transition to uncover relations between and transitions. In particular, we focus on three-dimensional $\mathcal{N}=4$ supersymmetric electrodynamics (SQED) multiple hypermultiplets, where second-order has been recently proposed in the large-flavor limit. provide interpretations from viewpoints Lefschetz thimbles resurgence. For this purpose, thimble properties expansion for partition function obtained by localization. show...

Abstract We perform imaging of a fundamental string from scattering amplitudes, and show that its image is double slit.

The effective optical nonlinearity of semiconductor quantum dots can be enhanced in one-dimensional photonic crystal structures. We have fabricated a with structural defect which is made CdSe dots. Besides the enhancement degenerate four-wave mixing efficiency, fast response transient population grating an order picosecond was obtained crystal. This structure used as future device high and response.

Recently, a number of high-speed optical clock generation technologies have been developed due to their potential useful applications in different fields. Here, we propose new terahertz technique with tunable repetition rate and central wavelength. The proposed generator consists an frequency comb light source variable-bandwidth spectrum shaper (VBS). VBS can generate arbitrary pulse trains waveform by controlling each spectral mode. We experimentally demonstrated rates 1.28, 2.56, 3.0, 4.0 THz.

In experiments, we demonstrated time-spread 200-Gchip/s 10-Gb/s eight-chip optical binary phase-shift keying code generation and matched filtering based on spectral amplitude phase control. By using a bandwidth-tunable high-resolution spectrum controller that have previously developed, were able to control components with 10-GHz resolution in the entire <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</i> -band, rectangular passbands. To...

A new high-resolution optical-spectrum control system is proposed and developed. It can both amplitude phase of spectrum with 10 GHz resolution for whole C-band. bandwidth tunable, rectangular-shape pass-bands are achieved. Applications also demonstrated.

Differential cross sections of nuclear reactions often exhibit characteristic oscillations in the angular distribution originated from an interference two indistinguishable processes. Here we propose a novel method to visualize origins such oscillations. This is achieved by taking Fourier transform scattering amplitudes, following idea wave optics. We apply this elastic 16O+16O and 18O+18O at energies above Coulomb barrier. The former system shows strong due nearside-farside interferences,...

A repetition rate and central frequency tunable THz order optical clock generated by a variable bandwidth spectrum shaper (VBS), 48-channel, 100 GHz-channel-spacing equalizer (SE) supercontinuum (SC) generator is proposed. The autocorrelations of the are obtained.

Saddle point approximation is a useful method to explore high energy asymptotic behaviors of string scattering amplitudes. We show that, even at tree-level, there are infinitely many complex saddles contributing amplitudes, and that the reproduce their appropriate poles zeros. Each saddle interpreted as semi-classical path in Lorentzian signature. The zeros Veneziano amplitude understood constructive or destructive interference such paths.

String scattering amplitudes in the high energy asymptotic region have been studied by saddle point approximation. Recently, it was pointed out that infinitely many complex saddles contribute to string even at tree-level after redefining original formal integration contour so new analytically continues appropriately. It is a challenging problem identify which higher genus corrections of amplitudes. In this paper, we construct QFT toy models same infinite mass tower as but ignoring...

We propose a formulation of black hole thermodynamics that incorporates the notions heat and work, based on in quantum theory AdS/CFT correspondence. First, for coupled holographic CFTs, we define coarse-graining procedure adopting principle maximum entropy. Employing this approach, when system is divided into target thermal baths, formulate first second laws, as well fundamental thermodynamic relation. Then, by translating resulting AdS gravity language, construct framework composite...

It is known that the Atiyah-Patodi-Singer index can be reformulated as eta invariant of Dirac operators with a domain wall mass which plays key role in anomaly inflow topological insulator boundary. In this paper, we give conjecture version given simply from Berry phase associated when adiabatic approximation valid. We explicitly confirm for special case two dimensions where analytic calculation possible. The divided into bulk and boundary contributions, each gives integration Chern...

We generated 5-ps optical pulses directly from a gain-switched semiconductor laser at 1550-nm wavelength. By amplifying these to 1-kW peak-power without serious nonlinear distortions, we successfully demonstrated high efficiency SHG and supercontinuum generation wavelength region of less than 1-μm.

Time-resolved phase sensitive pump-probe spectroscopy using a Michelson-type interferometer has been carried out. In this experiment, we obtain information on the time-resolved amplitude and of probe pulses by measuring cross-correlations between reference pulses. This method was demonstrated in an experiment dye molecules, hexamethylindotricarbocyanine iodide, ethylene glycol at room temperature. The experimental results indicated time evolution increase peak velocity pulse. These phenomena...

A new method for waveform measurement of photon echoes using a modified Michelson interferometer has been developed. The experimental setup uses collinear geometry, and echo signals are detected double-phase modulation technique. amplitude phase those excitation pulses simultaneously measured by this applied to experiment on dye solution. results explained stochastic model with an accumulation effect population grating.

We used a Michelson-type interferometer to observe the waveform of accumulated photon echoes in 3,3′-diethylthiatricarbocyanine iodide–doped poly(vinyl alcohol) film. By Fourier analysis measured interferograms we obtained shapes burned population grating and phase sample. From frequency distribution dye molecules, that is efficient for persistent spectral hole burning, estimated inhomogeneous 0–0 transition from S0 S1 levels molecules

Photon spheres are the characteristic of general black holes, thus a suitable touchstone for emergence gravitational spacetime in AdS/CFT correspondence. We provide spectral analysis an AdS Schwarzschild hole near its photon sphere. find that quasinormal modes sphere reflect boundary, resulting peculiar pattern. Our large angular momentum owes to analogue solvable Schrödinger equations such as inverted harmonic oscillator and Pöschl-Teller model, with Dirichlet boundary condition. Through...

Differential cross sections of nuclear reactions often exhibit characteristic oscillations in the angular distribution originated from an interference two indistinguishable processes. Here we propose a novel method to visualize origins such oscillations. This is achieved by taking Fourier transform scattering amplitudes, following idea wave optics. We apply this elastic $^{16}$O+$^{16}$O and $^{18}$O+$^{18}$O at energies above Coulomb barrier. The former system shows strong due...