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A novel ultra-broad bandwidth ultrasound detector is demonstrated using imprinted polymer microring, with flat frequency response up to ∼350 MHz at −3dB. A record high sub-3µm axial resolution in ultrasound/photoacoustic imaging applications is demonstrated.
Geometric structures of some van der Waals Complexes were determined by precisely measuring three-dimensional momentum vectors of correlated atomic ions produced in the laser-driven Coulomb explosion of these van der Waals complexes.
Far field characterization of light propagation in metamaterial with multi metal-dielectric layers is performed by introducing rough surface and nano grating structures. Light directional imaging and evanescent wave moiré fringes are observed in experiments.
The principles of spatially and spectrally resolved (S2) imaging are extended to include spectral phase information which yields a measurement which is resolved both spatially and temporally (ST).
We demonstrate frequency-domain cross-correlated (C2) imaging to reconstruct fiber modes and measure relative weights. Measurements take only 1.5 s, yield sub-ps group delay resolution and 25 dB modal discrimination, facilitating near-real-time monitoring of modal purity.
Label free mid-infrared photothermal imaging on bird brain slices is presented. The Amide-I vibrational band is excited by a quantum cascade laser and an Er:doped fiber measures the photothermal response.
Template-stripped plasmonic nanoholes are used as high-resolution chemical imaging substrates via surface-enhanced Raman spectroscopy. Chemical patterns created with microcontact printing show these surfaces to provide large and uniform enhancements suitable for imaging.
We present the fabrication of nitrogen-vacancy (NV) spin chains by implantation through a silicon mask on diamond. A minimum implantation aperture width of 5 nm is produced. Super-resolution measurements reveal NV lines 26 nm wide and minimal NV-pitch of 8 nm.
We fabricate photodetectors comprising silicon nanowires with elliptical cross sections, and show that their spectral responsivities depend on the incident light's polarization state. We perform polarization-resolved imaging using these photodetectors.
We report a photon-counting depth imager with sub-centimeter resolution of low-signature targets at kilometer range. The system exploited a Peltier-cooled InGaAs/InP single-photon detector module and a 1550 nm wavelength pulsed laser with sub-milliwatt average powers.
We demonstrate utilization of femtosecond-duration laser pulses for two-photon-absorption LIF imaging of atomic species in nonequilibrium plasmas. Femtosecond excitation enables improved signal-to-noise ratio, suppression of photolytic interferences, kilohertz-rate imaging, and potential for collisional quenching-free measurements.
Moisture retention of single human hairs were evaluated using localized generated THz waves. It is found that the cuticles have an important roles for the moisture retention inside the hair.
High-throughput detection of a large-area chip-based gold nanoslit biosensing array was detected using an imaging system based on white light Fourier transform spectrometry, with the detection sensitivity 0.02 in index change and 60nM of anti-BSA.
Electromagnetic Zenneck THz surface waves propagating on a bow-tie antenna are employed for time-resolved near-field imaging of subwavelength-size SrTiO3 and TiO2 particles. This approach provides high contrast, high-spatial resolution imaging through enhancing the fieldparticle interaction.
Spatial variations in the thermal motion of a nanoparticle are mapped with quantum enhanced precision over an extended region of a cell. This enables both subdiffraction-limited quantum metrology and quantum enhanced spatial resolution in biology.
Inflammatory responses to lung injuries are mediated through enhanced production of reactive oxygen species (ROS). We describe the use of activatable NIR fluorescent agents with high sensitivity to ROS to image the lung during conditions of high inflammation.
Synthetic Aperture Ladar (SAL) imaging experiments show that cross-range compression, including image based phase error correction, can be performed at very low return light levels. This includes images where the precompression shot-noise-limited signal-to-noise ratio is much less than unity.
We obtain sub-diffraction limited imaging at ω>ωp using a flat silver slab. Unlike Superlenses, the formation of subdiffraction imaging is attributed to high-k longitudinal modes that are supported by the non-local response of the media.
Time-resolved photoelectron imaging were performed with 90-nm pump pulses. Quantum beat by coherent excitation of multiple Rydberg states in Kr, and photodissociation of CO2 within a few ps from initially excited Rydberg state(s) were observed.
We demonstrate a method, permitting the observation of dielectric loading of hydrocarbons into a porous coordination polymer nanocrystal (PCP), by spatially resolving the phase difference between the near-field responses of two terahertz resonators.
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