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A method for polarization state measurements of THz pulses is presented. A calibration scheme is applied to correct for the impact of the non-idealities of the detector. Experimental results show excellent sub-degree angular accuracy with this method.
A microfluidic-integrated single particle sensor based on hollow photonic crystal cavities is reported. The interaction relies on the reversible resonance frequency shift induced by a dielectric particle near the cavity.
A diode-pumped passively Q-switched Nd:YAG/BaWO4/KTP yellow laser is presented for the first time. The obtained maximum average output power, conversion efficiency, pulse energy were 1.21 W, 9.06%, and 68.5 μJ, respectively.
Dual color beam recycling optical cavity was proposed to provide 402.5MHz 50ps UV laser pulses with a MW level peak power applicable to the laser assisted H-beam stripping for the Spallation Neutron Source.
Using the resonant optical transitions associated with individual nitrogen-vacancy defect centers, we demonstrate techniques for single-shot readout and quantum-optical connection of spin-based quantum registers in diamond.
We introduce a novel strategy to acquire gas phase temperatures by O2 pure rotational CARS during flame spray pyrolysis (FSP) for silica production. RCARS benefits from a polarization filtering technique that is essential in particle and droplet environments. Particle containing regions were located by correlating laser-induced breakdown (LIB) in a particle-laden and a particle-free flame at different...
We demonstrated a novel air/semiconductor mirrors integrated distributed feedback lasers by focused ion beam technology. When two DFB lasers are powered together, an injection-locking operation can produce strong microwave signals up to 25.5 GHz.
We demonstrated a single-photon laser ranging system working at 1550 nm with a 1-GHz sine-wave gated InGaAs/InP avalanche photodiode detector. By using time-of-flight measurement, 9-cm depth resolution was achieved under daylight background.
We demonstrate the application of optomechanical oscillator (OMO) as a high-resolution mass sensor. Preliminary experimental results and theoretical analysis show that the optomechanical oscillator can function as a low-power mass sensor with sub-pg sensitivity.
We demonstrate that a coherent superposition state of two temporally separated optical pulses, called a time-bin state, can be transferred to that of up/down electron spins in a semiconductor by synchronizing the time separation to the precession period of either electrons or holes. The time-bin transfer scheme does not require polarization mode degeneracy and can map the time-bin state to the electron...
High precision manufacturing with lasers requires selection of specific laser beam parameters for optimal processes. Example parameters and processes (exploiting either melting or vaporisation) are presented, optimised to provide fine-scale structuring of glasses and metals.
We demonstrate two-stage upconversion of single-photon signals from 1550 nm to the green spectral region with 87% internal efficiency with low excess noise, enabling sub-70-ps timing-jitter detection with Si avalanche photodiodes.
This work presents the direct laser printing process for the fabrication of organic electronics. A Nd:YAG laser is used to print organic (P3HT, PQT) and inorganic materials (Ag nanoparticles) on various substrates.
We demonstrate quantum key distribution at total transmission losses up to 57 dB. We show this is sufficient for a satellite uplink, which benefits from the simplicity of the satellite receiver but is experimentally challenging.
We demonstrate simultaneous detection of two nanoparticle species using phase-sensitive optical coherence tomography with photothermal excitation at two wavelengths matched to the distinct absorption peaks of the nanoparticles. To minimize bulk heating of the sample, a novel single-pulse excitation scheme is proposed and its sensitivity is characterized.
Dioxins contained in the soil was measured by means of multiphoton ionization mass spectrometry using a femtosecond laser. By a combination with gas chromatography, congeners of dioxins were determined at femtogram levels.
Highly energy transfer and asymmetric polarization of europium doped Si-O polar structures comprised of nc-Si in mesoporous silica induces 50-fold enhancement of green photoluminescence and demonstrates programmable characteristic with 10μs pulse.
A stable mid-IR photorefractive material was proposed based on LiF crystals with color centers (LiF:CCCs). The phase gratings in LiF:CCCs were fabricated and characterized in visible and IR spectral ranges.
We present 0.65-dB/cm loss symmetric waveguides fabricated in Gallium Lanthanum Sulfide glasses using spatial and temporal shaped ultrafast laser pulses. Micro-Raman analysis was used to correlate optical loss versus laser-induced lattice damages.
We present numerical and analytical studies of the nonlocal optical response for plasmonic nanorod metamaterials. Dispersion of photonic modes has been studied and an analytical description of the nonlocal effective permittivity has been developed.
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