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I will start by describing the basic motivation for using strongly interacting systems of photons to simulate condensed matter phenomena. I will proceed by briefly reviewing our founding results on the simulations of Mott to superfluid phase transitions in coupled cavities [1,2] doped with two level systems. I will also epigrammatically mention the main ideas behind the photonic simulation of quantum...
Two-photon holographic microscopy (2PHM) offers the advantage of simultaneous multi-site excitation in three dimensions. This is useful for studies of neuronal signal integration, which require multiple controlled synaptic inputs delivered simultaneously onto dendritic trees. In this work, we holographically split a single femtosecond pulse-laser in order to project multiple foci onto the neuron....
We report a cw 1064 nm-pumped external cavity diamond Raman laser operating at the 1240 nm. The slope efficiency was 42% and maximum output power, currently limited by the available pump power, was 7.5 W.
Integrated photonics offer numerous advantages for developing high dynamic range stellar interferometers for exoplanetary science. We report on the results from the first successful on-telescope tests of an integrated photonic pupil remapping interferometer.
One of the recently proposed super-resolution microscopy techniques is structured illumination microscopy (SIM), where a fine grating is projected onto the sample, and the final image is reconstructed from a set of images taken at different grating positions. With this technique, resolution improvement by a factor of two can be achieved compared to conventional wide-field imaging without the need...
We demonstrate direct laser written low loss waveguides in bismuth germanate for sensing applications in high energy physics. We discuss the suitability of waveguide arrays in this material for spatial resolved radiation detection.
A novel intensity-type vibration sensor using multiple phase-shifted fiber Bragg grating (MPS-FBG) pair is proposed to improve vibration sensitivity of a system interrogated by broadband source. The enhanced vibration sensitivity compared to normal FBG is accomplished by the increased of total intensity change produced by multiple subchannels operation. Significant vibration sensitivity enhancement...
Single-qubit operations in a single trapped ion are performed by means of purely geometrical phase factors. Multiple dark states in a four-level (“tripod”) system are manipulated adiabatically to perform the gate operations. Rotation operations along Z and X axes in the Bloch sphere are performed with high fringe visibilities.
We report measurements of parameters important to Raman laser design for single crystal synthetic diamond. Raman laser operating space is assessed as functions of the pump wavelength, temporal format and design architecture.
The heterodyne interferometer using the double pass geometry of optical beams in the acousto-optic modulator (AOM) has been applied for measuring concentrations of ethylene glycol solution. Our preliminary studies show that 0.001% of ethylene glycol can be measured by using this new method.
In this work we propose two ways of tuning of the optical properties of a fishnet metamaterial infiltrated by liquid crystal. The first method is to control the hole mode of the structure via the reorientation of the liquid crystal molecules. We show that in this case the system is mainly sensitive to the refractive index change occurring inside the holes. The second technique is to tune surface-plasmon...
We demonstrate the fabrication of ZnSe nanoparticles using fs laser pulses. Following the irradiation of fs laser pulses at a wavelength of 800 nm and pulse duration of 100 fs, many hexagonal-phase ZnSe nanoparticles formed on the surface of an undoped (100) cubic ZnSe single-crystal wafer. The interesting phase transition from the cubic structure of ZnSe single-crystal wafer to the hexagonal structure...
Hopping between potentials in optical tweezers yields a treasure trove of information. Here we use video and photodiode measurements coupled with a detailed theoretical picture of the optical potential to observe the properties of Brownian motion versus the scaling of trapping parameters. We show that this can be treated as a method of determining fluid and local environmental properties without requiring...
We present a metamaterial design based on the tight-binding properties of coupled optical-cavity arrays and quantum-mechanical atom-cavity arrays. By tailoring their dispersion properties, waveguiding of photonic and polaritonic Bloch waves can be engineered.
We have developed a three-dimensional vectorial finite element method (FEM) program which offers the flexibility to model 3D diffraction gratings with arbitrary geometry. The FEM satisfies the energy conservation relation and allows us to analyze periodic structures such as photonic crystals and metamaterials.
We measure the lifetime distribution of NV centers inside diamond crystals of varying sizes and for nanodiamonds placed on distinct surfaces. Results show the emission is strongly influenced by crystal size and dipole orientation.
We present a novel technique for optical interrogation of multiplexed displacement sensors with homodyne detection. Based upon the Digitally Enhanced Interferometry, we propose the use of a complex (IQ) modulation to reduce sensitivity to scattered light and provide multiplexing capabilities. Results of initial prototype testing are presented.
Physical mechanisms of multiple fluorescence regions and strong scattered light observed in the fluorescence images of the micro air plasma generated by double femtosecond laser pulses are investigated using time-resolved shadowgraphic method.
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