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We present a fully integrated mid-infrared sensor. The laser and detector are fabricated from a bi-functional quantum cascade structure, connected through a dielectric-loaded surface plasmon waveguide, which acts as interaction zone and provides high coupling.
We experimentally demonstrate avalanche sub bandgap detection of light at 1550 nm wavelength via surface states using the configuration of interleaved PN junctions along a silicon waveguide. The device operates in a fully depleted mode.
We report a terahertz waveguide fabricated from doped crystalline silicon. Anisotropic chemically etching is used to produce a periodic array of concave pyramidal troughs in the silicon that provide confinement in both transverse directions.
A piezoelectric aluminum nitride film on oxidized silicon wafer is used to realize high frequency surface acoustic wave devices. Optical ring resonator is integrated with the surface acoustic wave device to demonstrate a high speed acousto-optic modulation.
We observe experimentally a transition of quality factor scaling from third power to fifth power of the number of periods in periodic silicon optical waveguides designed to exhibit a degenerate band edge.
We demonstrate theoretically and experimentally the Rashba effect using light in two “counterpropagating” photonic lattices. We observe breaking of inversion symmetry in the resulting band structure.
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.
A mid-infrared (mid-IR) label-free chemical sensor was developed using opto-nanofluidics consisting of a Si-liquid-Si slot-structure. A broadband mid-IR lightwave can be strongly confined within a nanofluidic capillary by utilizing the large refractive index contrast (?n ∼ 2) between the liquid core waveguide and the Si cladding. Through an optical-field enhancement together with a direct interaction...
We demonstrate that surface-emitting second-harmonic generation is an effective technique for evaluating domains of periodically-poled lithium niobate waveguide: domain period, linear taper, and poling depth. Such a method reaches nanoscale spatial resolution of 0.5 nm.
We demonstrated using full-wave simulations that phased array antennas patterned on optical waveguides can strongly affect mode coupling and propagation in the waveguides. We designed broadband small-footprint integrated photonic devices based on the concept.
Topological insulators have been recently extended to photonics; however, the measurement of their topological invariant has been limited to probing edge states, an indirect measure. Here we optically measure a topological invariant using only bulk information.
A novel torsional cavity optomechanical system consisting of a nano-seesaw with one photonic crystal cavity on each side has been demonstrated, which exhibits extremely high mechanical sensitivity and can potentially reveal new optomechanical phenomena.
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...
The mechanisms of plasmonic THz wave trapping devices is attributed to the transformation from surface modes to cavity modes which have a saturated state. An ultraslow THz waveguide is realized by controlling the modes transformation.
Novel meta-coaxial nanoantennas are studied numerically, fabricated and experimentally characterized. These antennas provide local field enhancements of 200–800, super-localized fields with spatial FWHM of ∼1nm, and wide spectral ranges with FWHM bandwidths greater than 900nm.
We develop techniques to verify the computational complexity of a class of analogue quantum computers known as boson samplers. We demonstrate these techniques with up to 5 photons in two different types of integrated linear optical circuit, observing Hilbert spaces of up to 50,000 dimensions.
Terahertz quantum cascade lasers have not reached watt-level output powers yet. We present surface-plasmon devices with a peak power of 0.94 W. The device consists of two symmetric active regions combined by a wafer-bonding step.
We introduce the numerical design, analysis and fabrication of a novel nanoplasmonic phased array architecture for superlensing with geometrically controllable depth of focus.
We experimentally realize the generation of high-order photon encoded W-states involving up to 16 optical modes. Furthermore, we exploit the inherent probabilistic properties of these multipartite entangled W-states for generating genuine random numbers.
913 nm tapered diode lasers with 23th order laterally coupled grating is fabricated. Power of over 560 mW/facet and lateral divergence angle of 2.1° are achieved. Measured side mode suppression ratio is about 27 dB.
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