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    • Volume 54, Issue 05

    More content from Volume 54, Issue 05

    (Courtesy of the Zheng Research Group, UT-Austin)
    The operation of optothermoelectric nanotweezers (OTENT) consists of surface modification of a metal nanoparticle by CTAC adsorption (a) and formation of CTAC micelles (b) and the counter-ions (c) that are randomly distributed without laser heating (d). Upon thermophoretic migration under laser heating (e), a thermoelectric field traps the metal nanoparticle (f) and creates both in-plane (g) and out-of-plane trapping force (h).
    Optothermoelectric nanotweezers, powered by simple optics, promise multiple innovations in nanophotonics and colloidal particle science.
    May 1, 2018
    A machine-vision system for accurately finding defects on large industrial steel rollers includes a source of blue light, a line-scan camera, and a computer. The position of the roller as it is turned is measured by an encoder to coordinate roller orientation with the camera scans. The reason why it all works so well resides in the improved defect-finding algorithm.
    A newly developed machine-vision system can accurately measure roller surface defects.
    May 1, 2018
    (Courtesy of MPQ)
    The dual-comb Doppler-free spectroscopy setup with two-photon excitation is shown.
    Doppler-free recording of a species in a broadband frequency range spanning 10 THz has been demonstrated.
    May 1, 2018
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    A high-accuracy range-sensing system for noncontact shape measurement incorporates low-cost, rapidly modulated VCSELs.
    May 1, 2018
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    Researchers have developed a solar vapor generator from a novel hydrogel material that uses natural sunlight to efficiently produce purified and desalinated water.
    May 1, 2018
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    A single-mode antiresonant hollow-core fiber design offers less than 1 dB/m transmission for the same UV wavelengths, but with no observed solar degradation after 1 hour when ...
    May 1, 2018
    The new process allows simultaneous control and movement of the galvanometer scanner and the x-y stage.
    May 1, 2018
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    A flat metamaterial lens with a thickness of a third of a wavelength and an NA of 0.99 at a 715 nm wavelength has been created.
    May 1, 2018
    Conard Holton2
    The Innovators Awards program gives us the pleasure of recognizing more innovations in photonics by broadening the scope of honorees and noting many important advances that might...
    May 1, 2018
    FIGURE 1. With five axes of computer-controlled motion, UltraForm Finishing (UFF) is capable of polishing aspheric and freeform surfaces.
    From soft optical glasses to hard technical ceramics, flexible technology enables efficient polishing of aspheric surfaces to submicron form accuracies.
    May 1, 2018
    FIGURE 1. Photonic crystal fiber (PCF) designs proposed to reduce transmission loss of electromagnetic (and especially terahertz) waves include a hybrid core in a regular hexagonal cladding (a), a hybrid core in a modified hexagonal cladding (b), a rotated hexagonal core in a circular cladding (c), and a diamond-shaped core in a kagome cladding (d).
    Highly birefringent and near-zero-dispersion-flattened photonic crystal fibers guide terahertz waves for applications in low-loss imaging and sensing.
    May 1, 2018
    Susan Reiss 720
    The Canberra Declaration to create the Initiative promises to further heighten the profile of brain research—and biophotonics tools that enable it.
    May 1, 2018