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We present measurements and modeling of collimating surface states in slow-light photonic crystal superlattices consisting of alternating dispersive and homogeneous media. Superlattice periodicity allows evanescent-wave resonant coupling to surface photon bound states, supporting collimation.
We observed ultralow-threshold Raman lasing using direct free-space excitation of whispering gallery modes in a deformed microtoroid. This simple and robust excitation method can overcome the inadequacies of taper coupling.
Ballistic hot electrons in fs-laser-excited gold are used to generate ultrashort (2 ps duration) acoustic pulses in cobalt. The exponential dependence of the acoustic amplitude on gold thickness provides the electron mean-free-path of 120 nm.
We experimentally demonstrate the impact of disorder on edge states in photonic graphene and find strong evidence that not only chirality but also the vanishing of the density-of-states at zero-energy is preserved under structural disorder.
We report an observation of soliton rains in normal dispersion Yb fiber laser. The cavity consisted of a narrow filter and a broad birefringent plate filter. Soliton rain was obtained in the weak mode-locking regime.
Quantum photonics is a promising technology for implementing quantum information tasks. We demonstrate integration of multiple photon pair sources together with a circuit enabling creation and manipulation of photon pairs in a monolithic silicon-on-insulator chip.
We theoretically demonstrate that if pump powers are kept low enough to suppress multi-pair events in integrated photon pair generation via spontaneous four-wave mixing, many other nonlinear effects are often also constrained to negligible levels.
Transparent conductive oxides (TCOs) as substitutes to metals could offer many advantages for low-loss plasmonic and metamaterial (MM) applications in the near infrared (NIR) regime. By employing a lift-off process, we fabricated 2D-periodic arrays of TCO nanodisks and characterized the material's plasmonic properties to evaluate the performance of TCOs as metal substitutes.
A new technique of atomic layer deposition (ALD) has been the first introduced to fabricate PbS-doped silica fiber, whose optical properties are measured. The fiber exhibits photoluminescence property in the wavelength range 1100–1185 nm.
We studied attosecond pulse generation in the carbon K-edge with generalized double optical gating. With the gating effect, the emphasized harmonics in the cut-off region are observed with only 247 μJ driving laser energy.
The structure of a commercial highly birefringent PCF was locally tapered to create a polarizing section. A polarization-depended loss of at least 32.2 dB over a 1-cm length was induced in the 1550-nm region.
The evolution of spatially extended, entangled, anti-correlated two photon states in photonic waveguide arrays that induce classical transverse Anderson localization is theoretically and experimentally investigated.
An XUV continuum supporting 280 as isolated attosecond pulses is generated in argon with a 200 mJ, 17 fs Ti:Sapphire laser using the GDOG technique. The energy of the XUV pulse is over 100 nJ at generation location.
The entanglement level of two initially entangled qubits, subjected to an uncorrelated unital noisy channel is simply manifested by the radii of its Bloch sphere mapping. We demonstrate this relation experimentally using an all-optical setup.
The first experimental demonstration of resonant optical trapping of dielectric particles in a hollow photonic crystal cavity is reported. The existence of mutual interaction between the confined field and the particle is revealed.
We demonstrate a new type of electrically tunable strong coupling between a planar metamaterial layer and an ultra-thin epsilon-near-zero layer made of a doped semiconductor. This can find novel applications in chip-scale infrared optoelectronic devices.
We demonstrate electron diffraction from a polycrystalline aluminum foil sample using 100 keV electron bunches generated from laser-driven plasma wakefield. Our proof-of-principle experiment shows the potential of high repetition rate, low energy electron pulses from laser wakefield accelerators for ultrafast electron diffraction applications.
An optical fiber taper placed in the near field of a “split-beam” photonic crystal nanobeam cavity with a physical gap at the cavity center breaks the system's vertical dielectric symmetry, enabling selective optomechanical coupling to multiple cantilever resonances using a single optical nanocavity mode.
We have built and tested the first experimental demonstration of a photonic quantum digital signature test-bed. We will present a case for quantum digital signatures, overview of the protocol, description of the system and results.
We report the first demonstration of CW-pumped correlated photon-pair generation in an AlGaAs waveguide with a coincidence-to-accidental ratio > 100. This is about two orders of magnitude greater than previously reported in AlGaAs waveguides.
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