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Dielectric-loaded surface plasmon-polariton nanowaveguides on the gold film are fabricated by two-photon polymerization with femtosecond laser pulses. The leakage radiation microscopy shows that they are single-mode with strong mode confinement at 830 nm.
We propose a metamaterial device that exhibits a broadband singularity in the photonic density of states and negative refraction. These resonant and non-resonant effects allow control over decay rates using a planar nanoscale structure.
We present a study of higher-order spatial-mode propagation in waveguided parametric downconversion, including direct imaging of photon-pair mode profiles and analysis of spatial-spectral coupling.
High resolution THz vibrational spectrum of TRIS is measured using waveguide THz-TDS. 12 highly resolved spectral features for the dropcast film and 11 features for sublimated film are observed at 13.6K.
Type-I TMw→TM2w phase-matching in isotropic [001]-grown AlGaAs Bragg reflection waveguide is reported. This nonlinear process coexists with type-I TEw→TM2w and type-II TEw+TMw→TM2w interactions within a spectral window of 17 nm.
Ridge waveguide type-I quantum-well GaSb-based diode lasers, with active regions utilizing InGaAsSb/AlInGaAsSb quantum wells, have been demonstrated to operate at temperatures as high as 40°C with 1 mW of power at wavelengths above 3.2 μm.
We demonstrate an increase of nearly 10 dB in the efficiency of broadband wavelength conversion via four-wave mixing in silicon nanowaveguides by incorporating a p-i-n structure and applying modest voltages to remove the free carriers.
We show through numerical simulations that optical pulses in silicon waveguides can undergo significant self-induced changes in their polarization state. These changes are mediated mostly by free-carrier dispersion and depend on waveguide dimensions.
We numerically analyze chromatic dispersion in tightly curved strip and slot waveguides with high index contrast. Zero-dispersion-wavelength may have a shift over 220 nm when bending radius is reduced to a few microns.
We demonstrate an error-free add-drop filter for a 10 Gbps signal, tunable over 16 nm. The structure consists of a series of ring resonators embedded between micro-heaters designed to ensure homogeneous temperature distribtion.
A Mach-Zehnder refractive index sensor is inscribed in a microfluidic lab-on-a-chip by exploiting the unique three-dimensional capabilities of femtosecond laser fabrication. This enables high sensitivity and spatially resolved label-free detection of biomolecules.
Opto-fluidic technique demonstrated non-destructive characterization of nonlinear optical waveguide by modifying effective index of optical mode. Nonuniformity of phase matching wavelength, degradation factor of NLO performance, is revealed in a waveguide wavelength converter.
When pumping at a short wavelength of 932 nm, the high gain obtained at the 981-nm zero-phonon line of a KY(WO4)2:Gd3+, Lu3+, Yb3+ planar waveguide resulted in efficient laser emission in an open cavity configuration.
UV-induced optical polymer waveguides and microfluidic channels were integrated on a single polymer chip as a platform for fluorescence excitation of biological samples. Fluorescence excitation could be demonstrated for labeled phospholipids and for stained cells.
We directly investigate the influence of nonlinear loss dynamics on a slow-light silicon waveguide optical limiter, mapping how the response of free carrier absorption varies as intensity changes approach the free carrier recombination time.
Authors realized the optical switch satisfying high-speed response (<;10 nsec), polarization independent operation and low driving voltage of 3 volt by constructing a new structure on LiNbO3 substrate for the first time in the world.
We present a new technique to fill arbitrary patterns of a photonic crystal fiber selectively with high nonlinear liquids. Thus we can create waveguides and waveguide arrays with tailored dispersion, nonlinearity, and spatial arrangement.
We demonstrate residual dispersion and OSNR monitoring from 40Gb/s to 640Gb/s via slow-light enhanced optical THG in dispersion engineered 2D silicon photonic crystal waveguides.
We report laser oscillation from waveguides inscribed in Nd-doped silicate glass. Laser action was observed at 1062nm for a pump of 808nm, with a slope efficiency of 15.0% and maximum output power of 7.5mW.
Here we demonstrate a SERS optofluidic device using a nanochannel fabrication method developed by our group. This device consists of nanochannels and a SU-8 waveguide. As a test, we demonstrate the detection of SERS-active Rhodamine6G.
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