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We demonstrate near-field radiative heat transfer between nanostructures and show that it dominates over other on-chip conduction channels. The measured heat transfer behavior matches the predictions of boundary element method simulations for parallel nanobeams.
We present the first time-domain measurement of a guided-wave nano-opto-mechanical system, resulting in the coherent excitation of multiple mechanical modes. We deconvolved the electronic and mechanical responses to observe the evolution of the coherent superposition.
Photon echo measurements were conducted on the 3H4 → 7D2 transition of Pr3+, on a slab waveguide of TeO2 deposited on a substrate of 0.005%Pr3+ : Y2SiO5. Optical coherence times of 62µs were observed, which is consistent with the bulk sample value of 111µs, given the level of instantaneous spectral diffusion. The results indicate that planar waveguide technology could be utilized for quantum communication...
A more than one-octave-wide supercontinuum (0.9 to ∼2.1 µm) is generated in a double-nanospike As2Se3-silica step-index waveguide. The average supercontinuum spectral intensity is increased by ∼20 dB compared to the previously reported single-spike structure.
Plasma guiding structures are generated with programmable axial density modulations using a Spatial Light Modulator (SLM). A coherent beam-combining scheme enables the sculpting of high power beams with modest energy passing through the SLM.
We experimentally demonstrate third-harmonic generation in polycrystalline anatase titanium dioxide nano-waveguides, using ultrashort optical pulses centered around 1550 nm. Phase matching is achieved using higher order optical modes at the third harmonic wavelength.
We show that femtosecond filament arrays can generate robust, very long-lived optical waveguides in air. These guides have millisecond lifetime and should be suitable for the transmission of high average power beams.
We measure the nonlinear response of CMOS-compatible SiGe waveguides in the mid-infrared. Comparing with numerical calculations, we extract the multi-photon absorption coefficients and the induced free-carrier absorptions for wavelengths between 3µm and 5µm.
Supercontinuum generation in CMOS compatible hydrogenated amorphous silicon waveguides with femtosecond pulses at telecommunication wavelengths is experimentally studied. It is shown that stable 540 nm broad supercontinua can be obtained in 1 cm-long waveguides.
We report an on-chip all-optical CMOS-compatible radio frequency spectrum analyzer with a bandwidth exceeding 2.5 THz, and use it to measure the intensity power spectra of mode-locked lasers with repetition rates up to 400 GHz.
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