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The potential of a fully noncontact, standoff, laserultrasound system that acquires ultrasonic images within biological tissue is examined. A pulsed laser converts optical energy into ultrasound via photoacoustic mechanisms, while laser Doppler vibrometry measures emerging ultrasonic waves at the tissue surface. Differing from photoacoustic tomography (PAT), which maps spatial variations in tissue-optical...
We experimentally demonstrate a three-dimensional ultra-thin metasurface carpet cloak can cover on an arbitrary-shaped object and make it undetectable by the visible light owing to the phase control capability of the metasurface.
We have experimentally demonstrated an active plasmon sensor with sub-p.p.b. level explosive molecules detection. Loss compensation by gain in surface plasmon cavity enhanced the sensitivity significantly.
We theoretically propose a novel scheme for sub-diffraction imaging based on a process of adiabatic decompression of the local wavelength of a surface plasmon polariton supported by two adjoining curved metal surfaces.
We theoretically demonstrate, an order of magnitude enhancement in propagation length of SPPs (visible wavelength) along a metal-phaseonium interface via quantum coherence. Such coherence effects hold promise for quantum control in the field of nanophotonics.
We demonstrate that the optical force exerted on a suspended dielectric waveguide coupled to a metallic substrate is greatly enhanced compared to dielectric substrate, due to subwavelength optical energy confinement in the hybrid plasmonic mode.
We show how surface plasmon polaritons can be routed along arbitrary trajectories by forming nondiffracting Airy beams on metal surfaces. The dynamic computer-based control over such plasmonic Airy beams is successfully demonstrated in our experiment.
We demonstrate a high-Q surface-plasmon-polariton (SPP) whispering-gallery microcavity with SPP Q factors up to 1,376 plusmn 65 in the near infrared. The SPP eigenmodes are accessed evanescently using a tapered optical waveguide.
We report the first bulk metamaterials at visible frequencies that shows intriguing negative refraction for all incident angles. The metamaterial is realized by growing silver nanowire in a porous alumina template.
We experimentally demonstrate cloaking at optical frequencies. A dielectric carpet cloak is designed to hide object under a curved reflecting surface by mimicking the reflection from a flat surface, enabling broadband invisibility with low loss.
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