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We demonstrate strong anharmonicity of the polariton dressed states in a highly dissipative cavity quantum electrodynamics system via dark state resonances. Vacuum Rabi oscillation and photon blockade occur even for decay-to-interaction rate ratio exceeding 100.
An yttrium orthosilicate nanophotonic resonator is fabricated with resonances near the 4I9/2-4F3/2 hyperfine transition of Neodymium ions. Measured absorption by Neodymium embedded in a nanobeam indicates promising prospect for coupling ions to our nano-resonator.
We present several improvements to the understanding of strained silicon's second-order optical nonlinearity. In addition to incorporating the material into electro-optic modulators and wave-mixers, we analyze the nature of the optical nonlinearity on the nanoscale.
We demonstrate Kerr-lens mode-locked polycrystalline Cr2+:ZnSe and Cr2+:ZnS lasers with estimated pulse duration of 125 fs, 160 MHz pulse repetition rate and output power of 60 mW (Cr2+:ZnSe) and 30 mW (Cr2+:ZnS).
In this talk I will review recent progress on Optofluidics at Cornell in three application spaces: mobile and global health, bioenergy, and nanoparticle analysis. Fundamental science will be described as well as routes to commercialization and deployment.
We present graphene-based optical modulators integrated with Si3N4 waveguides which provide broadband flat absorption from visible to infrared wavelengths. Tunable attenuation of 0.067 dB/µm is measured in Mach-Zehnder interferometers and microring resonators.
We demonstrate a convenient approach for precise dispersion engineering of silicon microdisk resonators via thermal oxidation. This technique potentially enables efficient correlated photon-pair generation for quantum photonics.
We report the design and realization of a 4th-order pseudo-elliptic microring filter with negative coupling in SOI. Measured filter response showed the effect of coupling phase dispersion and sharp skirt roll-off due to negative coupling.
We develop a model for silicon-on-insulator microresonators with magnesiothermically-formed porous silicon cladding possessing three-dimensional interconnected pores. Investigation of waveguide design and geometrical parameters indicates an optimized areal mass sensitivity of ∼ 0.2 pm/(pg/mm2).
Using a commercial, diode-side pumped Nd:YAG rod laser module, we obtain more than 53% extraction efficiency in fundamental mode with respect to multimode operation in a fully polarized beam.
We propose an on-chip nano-horm-shaped metal-clad cavity. The proposed device is 0.8 µm in height-half the size of the previously reported devices— and achieves the quality factor of 1000 and effective volume of 0.31(λ/n)3.
We demonstrate all-semiconductor thin-film plasmonic absorbers, where strong absorption in these structures is linked to the excitation of highly-confined negative-index surface plasmon polaritons.We present numerical and analytical descriptions of guided modes of the system.
We developed a method for calculating the Q-factor of a 2D photonic crystal nanocavity directly from the in-plane wavevector distribution of the cavity mode. A high-Q of >107 was obtained with high accuracy and speed.
We report on a purely hard-aperture Kerr-lens mode-locked Yb:YAG thin-disk oscillator delivering 230-W, 11.5-µJ, 330-fs (30 MW) in air. To our knowledge this is the highest average power achieved from KLM oscillators so far.
We demonstrate a dual-cavity resonant structure that employs frequency splitting at one of three resonances to structurally compensate dispersion. We show seeded four-wave mixing across the largest free spectral range to our knowledge of 26nm.
We improve CW wavelength conversion efficiency by 10 dB in an optical waveguide consisting of 51 directly-coupled silicon microrings, based on electronic free-carrier sweepout using two reverse-biased p-n junction diodes on each microring resonator.
Local terahertz fields of multiple 10 MV/cm tailored in gold metamaterials drive electronic interband transitions in intrinsic GaAs. The bandgap exceeds the THz photon energy 400-fold. Photoluminescence microscopy maps the THz near-field distribution.
We propose a reflective phase-only modulator formed by two layers of high-contrast grating reflectors. By arranging such optical phase modulators in a 2D array, ultra-fast Si-based phase-only spatial light modulators can be realized.
We retrieve the thermal dissipation time of τ=0.25µs and investigate the power dependent absorption in a SiN microring resonator. We estimate n2=4.3×10−19m2/W based on clear 1 GHz optical modulation of the refractive index.
A Si-integrated modulator based on epitaxial ferroelectric BaTiO3 thin films is demonstrated with gigahertz modulation bandwidth and an effective Pockels coefficient of 213 ± 49 pm/V.
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