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Filament-induced periodic surface structures are generated on a wide variety of materials with near-IR and UV lasers. The surface structure features demonstrate the relation to laser wavelength and polarization and energy distribution in a filament.
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 demonstrate the use of a 6-terminal photonic lantern in order to achieve deterministic conversion of the transverse structure of heralded single photons, generated through the spontaneous four wave mixing process in a birefringent fiber.
We present a mid-IR OPCPA laser producing multi-mJ femtosecond pulses at 1kHz. The beam profile of the 3.1μm idler is excellent, enabling efficient coupling into high-gas-pressure waveguides, required for phase matched 1keV high harmonic generation.
Mid-infrared supercontinuum spanning from 1.8–9 μm with an output power of 41.5 mW is demonstrated by pumping tapered large mode area chalcogenide photonic crystal fibers using a 4 μm optical parametric source.
We demonstrate parametric amplification around 2 μm in a dispersion engineered tapered microstructured chalcogenide fiber. Almost 5 dB of signal amplification was achieved by 125 mW coupled power from a thulium-doped fiber pump laser.
The HAPLS laser system has been commissioned to its first integrated performance milestone, delivering laser pulses with 16J sub-30fs duration at a 3⅓Hz repetition rate. This first all-diode-pumped petawatt-class laser offers the average powers required for secondary source applications.
We experimentally demonstrate for the first time uniform and broadband supercontinuum generation in long tapered multimode fibers. This is achieved through an accelerated geometric parametric instability that forces the sidebands towards higher/lower frequencies.
A thin-disk based regenerative amplifier with a compressed output power of more than 1 kW is presented. At a wavelength of 1031 nm pulse energies ≥100 mJ are demonstrated at a repetition rate of 10 kHz with pulse durations of <1.0 ps.
We have developed a high-efficiency (∼90%), broad-bandwidth low-absorption pulse compressor suitable for high energy pulses. This technology is a significant step in enabling high peak power laser systems to operate at high repetition rates.
We observe a nonlinear spatial self-cleaning process with ultrashort pulses in multimode fiber. Experiments and simulations demonstrate its origin to be nonlinear interactions between the fiber spatial modes, due exclusively to the Kerr effect.
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