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A microscopic theory is applied to describe nonlinear terahertz excitations of optically-dark excitons in Cu2O. The theory is quantitatively compared to recent experiments. Signatures of Rabi flopping and ponderomotive contributions are discussed and disentangled.
New type of non-volatile high-speed optical memory is proposed, which utilize the magnetization reversal of nanomagnet by spin-polarized photo-excited electrons. To verify high speed of proposed demultiplexing method, the switching of spin polarization at 2.2 TGz was demonstrated.
We present terahertz emission from nonpolar InN due to carrier transport in stacking fault-related internal in-plane electric fields. Evidence of in-plane transport is observed as a terahertz waveform polarity flip with reversal of the c-axis.
This paper discusses the optical characteristics of a nonpolar a-plane InGaN/GaN quantum well (QW) with different indium compositions, QW well widths, and injection carrier densities. We find that the larger indium composition and smaller well width make the energy separation of |Yrang-like state to |Zrang-like state larger, and as a result enhance the polarization ratio of light. However, the polarization...
Through systematic experiments and stochastic modeling we demonstrate that cell motility can be guided by optical torques exerted by the light polarization. This torque affects the actin network which is responsible for cell's movement.
The conditional dynamics of 85Rb atoms in a driven two-mode optical cavity shows quantum beats from ground state Larmor precession. We study the manipulation and control of their fringe visibility.
The distribution of an ultrafast optical pulse train over multiple fiber links with long-term stable timing precision within 2 femtoseconds rms is accomplished by integrating a polarization maintaining output with 300 meter long fiber links.
We report quantitative spectrally-resolved transient absorption in GaAs quantum wells for varying pump intensity. Comparison to microscopic modeling yields quantitative information about the Coulomb-induced nonlinearities and radiative coupling.
Femtosecond switching of anisotropic nanostructure indicating birefringence with a time constant of plusmnb200 fs was observed. Such anisotropy has evolved by lowering threshold for defect formation and enhanced coherency of the electron plasma wave.
The three thermo-optic coefficients of the biaxial laser host KLu(WO4)2 are measured at 633 nm by a deflection method and nearly athermal propagation directions are found for polarizations along the Nm and Np principal axes.
Studies are presented that combine optical and THz excitation in the linear and nonlinear regimes. The analysis focuses on exciton formation and decay, the plasmonic response, THz gain, excitonic Rabi flopping, and quantum-state control.
We experimentally characterize a linear optics, telecom-band quantum controlled-NOT gate using a fiber-based source of degenerate photon pairs, and bound its process fidelity to 0.907 les Fp les 0.948.
Observation of optical spin-Hall effect that appears when a wave carrying spin angular momentum interacts with plasmonic nanostructures is presented. The measurements verify the geometric phase, demonstrated by the spin-dependent deflection of the surface waves.
We demonstrate strong optical activity (and circular dichroism) for both microwave and photonic achiral planar metamaterials. The effect arises from extrinsic chirality resulting from oblique incidence of light onto the metamaterial structures.
We present a method for describing optical properties of inhomogeneous media at mesoscopic scales. When the volume of interaction varies, the effective polarizability tensor introduces a new length scale characterizing the structural morphology.
We report pronounced light-induced change of the optical activity at terahertz frequency in metal chiral gratings on semiconductor substrates. This result opens new horizons in the active terahertz polarization control.
Optical responses of metal nano-aperture probes for the electric and the magnetic field polarization are investigated with radially and azimuthally polarized lights.
We propose an all-optical differentiation scheme based on polarization coupling and filtering while perform it well at 12.5 Gb/s with error ~0.07, which is applicable to high-speed optical signal processing at 40 Gb/s and above.
We demonstrate that the coherence of the electron spin state, which was transferred from the light polarization state, is tomographically measured in a semiconductor quantum well via the light-hole excitons under in-plane magnetic field by the developed tomographic Kerr rotation method.
We report a gain-enhanced and spectral-narrowed optical parametric oscillator based on a monolithic PPLN integrating an optical parametric generator with two electro-optically active polarization-mode converters. Unique spectral manipulation of the OPO signal is also demonstrated.
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