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We investigate a scatterer comprising a dielectric core and randomly distributed metallic nanoparticles forming a shell. We show that it acts as an isotropic magnetic meta-atom and as a cloak to conceal the core.
We present a carrier-envelope stable, 100 kHz source of intense 6 cycle mid-IR pulses at 3.2 microns. The CEP stability is sub-100 mrad RMS over 1 million pulses.
Conformal grating cloaks are relatives of the carpet cloak and can deliver excellent cloaking for reasonable parameters. This is illustrated by photorealistic Newtonian ray-tracing calculations and by cross-correlation coefficients based on these.
We demonstrated single-shot frequency-domain tomographic imaging of laser-produced refractive index structures that evolve during propagation, using multiple probe pulses multiplexed to a single spectrometer and tomographic reconstruction algorithms.
We present a three-dimensional carpet cloak composed of a 350-nm rod-spacing woodpile photonic crystal with tailored local volume filling fraction. Microscope images under monochromatic illumination reveal excellent cloaking at 700 nm wavelength.
Numerical simulations and experimental measurements to plasmon resonances in Ag Bowtie nanoantennas show that, as the bow angle increases, one fundamental resonance blue- and then red-shifts; two types of high-order resonances emerge at large angles.
We report experimental demonstration of an optical gate that increases the size of polarization-entangled W-states by accessing only one qubit, and discuss strategies of local expansion and fusion to prepare large scale W-state networks.
We demonstrate optical beam auto-focusing without the need of a focusing lens or nonlinearity. Radial Airy beams with inward and outward accelerations are used and an abrupt transition between Airy and Bessel behavior is observed.
We propose and demonstrate the projection of two quantum three state systems (qutrits) onto a maximally entangled state. The qutrits are represented by the polarization of biphotons — pairs of indistinguishable photons.
We study the modular and layered framework to develop large scale quantum computer architecture with photonic qubits. A chip-based photonic module is integrated with the TCQC as depicted in [2] along with detailed analysis of resources.
We report on several tens of Watts CW Raman-Stokes in hydrogen gas with linewidth as low as 80 KHz. This represents a narrowing of the Raman-linewidth by a factor of more than 4 orders of magnitude.
Quantum process tomography (QPT) is a resource intensive task. We present an experiment in which a 3 dimensional decoherence free subspace is experimentally identified using 36 measurements, instead of the 256 measurements required for QPT.
A hole spin trapped in a quantum dot is a potential qubit. We demonstrate near unit fidelity initialization of a single hole spin in a InGaAs/GaAs Quantum dot.
The source of intensity damping of Rabi-oscillations in quantum dots has long been in question. Here we identify acoustic phonons as the principal source of dephasing and demonstrate the re-normalization of the Rabi-frequency.
We propose a deterministic approach for the generation of a 2D photonic cluster state from optically manipulated quantum dots. Our scheme can be implemented with existing technology. Error localization allows for quantum error correction
A polarized picosecond laser pulse, which couples the bright exciton states to biexciton resonant states, is used to manipulate the exciton spin. We directly demonstrate this novel knob in a picosecond time-resolved two pulses experiment.
We apply a magnetic field to photonic crystal cavity devices with embedded Indium Arsenide (InAs) quantum dots (QDs), and demonstrate strong coupling between individual QD exciton spin states and a photonic crystal cavity.
Two photons having different colors can undergo the Hong-Ou-Mandel interference effect if the usual beam splitter is replaced by Bragg scattering via four-wave mixing in an optical fiber, which acts as a frequency shifter.
We experimentally demonstrate the excitation of a mechanical Rayleigh surface mode through optical electrostriction in a silica microsphere resonator. These modes have applications in optomechanical photonic oscillators and surface acoustic wave based sensing.
We report the simultaneous experimental generation of multiple quadripartite continuous-variable cluster states in the optical frequency comb of a single optical parametric oscillator operating below threshold.
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