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We have demonstrated kW-peak-power terahertz (THz)-wave parametric generation and 70 dB-dynamic-range detection by using efficient surface-coupling configuration. The system is capable of producing and detecting monochromatic THz-wave pulses in the wide frequency range from 0.8 to 2.8 THz.
We theoretically analyze a nonlinear optofluidic process produced by radiation pressure of a high quality factor whispering gallery mode in a liquid droplet. Using liquid properties that are experimentally attainable, we find that such a process may lead to photon-photon interaction at single photon energy level.
In this work, the on-chip quantum interference of two single surface plasmons was achieved and the high visibility (greater than 90%) proves the bosonic nature of single plasmons. The effect of intrinsic losses in plasmonic waveguides is also discussed.
We present the first realization of a single-mode surface-emitting quantum cascade laser array. The ten lasers operate over a bandwidth of 175 cm−1 between wavelengths of 8 and 10 μm and show similar pumping characteristics. The device is compatible with milliwatt continuous wave operation, which makes it suitable for spectroscopic applications.
The evolution of nanogratings in a porous glass was directly observed, revealing that the nanogratings origin from the standing plasma waves at the interfaces excited by femtosecond laser pulses.
We present analysis of a resonantly enhanced Sagnac interferometer. While one output port is highly sensitive to nonreciprocal phenomena and robust to reciprocal fluctuations, the complementary output can be used to simultaneously monitor reciprocal drifts.
We demonstrate an optically pumped GaSb-based mid-Infrared photonic crystal surface emitting laser (PCSEL) at 2.3μm with line width of 0.3nm. The PCSEL was operated with temperature up to 350K, showing a shift rate of 0.21 nm/K.
We demonstrate the reduction of phase noise 10 dB below the thermomechanical noise limit of individual oscillators in arrays up to seven synchronized self-sustaining optomechanical oscillators.
Dynamic tunability of the plasmonic resonance in graphene nanoribbons is desirable in the near-infrared. We demonstrated a constant blue shift of plasmonic resonances in double-layer graphene nanoribbons with respect to single-layer graphene nanoribbons.
We demonstrate an integrated four quadrant detector in silicon for infrared light, based on integration of plasmonic splitting, focusing and plasmonic enhanced internal photoemission detection on a single silicon plasmonic chip.
We demonstrate a side-channel photonic crystal fiber for surface enhanced Raman scattering applications. A low detection concentration of 5 pM 4-aminothiophenol solution and an accumulative effect of Raman signal along the fiber length are achieved.
We generate deep and near sub-wavelength ripples on MoS2 by femtosecond laser irradiation with incident fluence dependence and pulse number insensitivity. Raman analysis demonstrates that no amorphous or oxidative exhibition remains after laser processing.
A differential optical profilometry technique with picometre-range sensitivity is adapted to the non invasive measurement of the roughness inside hollow glass fibres by use of immersion objectives and index-matching liquid.
Fully polymeric 3D microcavity system was proposed and demonstrated in which integrates whisper-gallery-mode microrod lasers and output coupling waveguide. As on-site additive-manufacturing technique, microdispensing wired 7.3 μmφ polymer-microrods.
With a convenient and controllable evanescent-field-induced transfer method, graphene flakes were deposited on the surface of a 1-μm-diameter microfiber, which can be used for ultrafast optical modulation based on it's distinct saturable absorption.
Atomic Layer Deposition is used to control the surface recombination of carriers in GaAs photonic crystal cavities. All-optical wavelength conversion at a GHz repetition rate is demonstrated with recovery time below 10 ps.
We demonstrate a THz lens designed using an artificial-dielectric medium fabricated from a stack of stainless-steel plates. The lens is capable of focusing a 20 mm diameter beam to a spot size of 4 mm.
We present a nanoplasmonic interferometric sensor platform that can differentiate the adsorption of a thin protein layer on the sensor surface from bulk refractive index changes, exploiting the different penetration depths of multiple SPPs.
We have studied angular distribution and spectra of thermal radiation of lamellar metal/dielectric metamaterials with hyperbolic dispersion and have found them to be reasonably close to the corresponding properties of simple metallic films.
We employ an electric gating method to modulate the surface field of graphite and study the THz generation. The result reveals the mechanism, the similarities and differences to semiconductors, and the effective mass difference of electrons and holes.
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