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We report the observation of the torsional vibration of an optically levitated nanodiamond in vacuum. We propose a scheme to achieve torsional ground state cooling, and utilize the electron spin-torsional coupling to do quantum simulation.
We propose a scheme for recovering quantum states from a single observable, corresponding to a single setup, by adding a known ancilla state, introducing mixing between degrees of freedom, and utilizing structure in the states.
We implement a single-photon subtractor that can be tuned to subtract a single photon exclusively from one mode or coherently from multiple modes. We experimentally characterize the device by employing coherent-state quantum process tomography.
The resonance wavelength of single gold nanorods patterned on an epsilon-near-zero substrate is observed to be independent of antenna length. Additionally, the near-field coupling between dimer antennas is suppressed at the epsilon-near-zero wavelength.
With an emphasis on nanowires and monolayer MoS2, we will discuss how confinement of symmetry breaking electric and plasmonic fields interacting with low-dimensional materials produces unexpected response such as emission from Si and induced chirality.
Temperature induced deviations to the optical responses of noble metals and refractory plasmonic metals were investigated to temperatures up to 900 °. The manifestation of these deviations in different plasmonic applications will be presented.
I present an approach for achieving perfect absorption in 2D atomic layers utilizing randomized dielectric layers. The emergence of high Q optical modes featuring >99.9% absorption in single layer graphene is shown.
Graphene-boron nitride (BN) heterostructures provide a versatile platform to flexibly tune the sign of the group velocity of the hybrid plasmon-phonon-polaritons, enabling all-angle negative refraction between graphene plasmons, BN's phonon polaritons and their hybrid polaritons.
Localized surface plasmon type resonances have been demonstrated in nanostructured films of recently discovered 2D Ti3C2. A planar design of highly broadband plasmonic absorber is implemented as an application of this new plasmonic material.
We combine the near-deterministic preparation of a single atom in optical tweezers with magnetically-insensitive Raman sideband cooling, to prepare an atom in its motional ground state with 2D fidelity of ∼0.7 for the entire procedure.
We present milli-Watt threshold frequency comb generation in AlGaAs-on-insulator integrated microresonators exhibiting normal GVD by employing the effects of mode interaction.
We present a scheme to efficiently perform boson sampling using frequency modes which yields exponential reduction in losses and significantly reduced experimental complexity compared to conventional spatial-mode implementations.
Spin coherence time, T2∗, of the silicon vacancy color center in diamond is limited by thermal phonons existing in the lattice. We show how this process can be engineered by applying static strain using a micro-electro-mechanical system (MEMS) fabricated on diamond. By suppressing the relevant thermal process, we demonstrate the improvement of spin T2∗.
We demonstrate a dynamic plasmonic colour display technique based on catalytic magnesium metasurfaces. Controlled hydrogenation and dehydrogenation of the constituent magnesium nanoparticles, which serve as dynamic pixels, allow for plasmonic colour tuning, erasing, and restoring.
53 attosecond X-ray pulses with photon energies up to 300 eV are generated using polarization gated CEP-stable two-cycle pulses around 1.8 μm and characterized using photoelectron streaking technique combined with the PROOF retrieval method.
Polygon scanner systems were introduced to the laser material processing market in 2013. Process developers worked out new strategies to exploit the high scan speed offered by the polygon scanner system technology. An updated product status and overview of emerging applications will be presented.
An investigation of Ir(III) complexes has been performed using double-pump probe (DPP) experiments to decouple the triplet quantum yield and triplet cross-section of these complexes. Both femtosecond and picosecond DPP measurements are presented.
We develop a scalable heterogeneous integration platform for quantum photonic circuits based on Si3N4 waveguides and on-chip, self-assembled InAs quantum dot-based single-photon sources. Hybrid waveguides, photonic crystals, and microring resonators are demonstrated.
We discuss our recent progresses on developing efficient quantum devices for scaling up optical quantum technologies. We insert semiconductor quantum dots in microcavities and use these artificial atoms to fabricate near-optimal single photon sources and single photon filters.
We demonstrate that properties of photons emitted from a doubly charged quantum dot molecule can be modified using spin-flip Raman emission. The temporal and spectral bandwidth of the emission matches that of the pulsed laser.
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