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  • Volume 59, Issue 01

    • Volume 59, Issue 01

    FIGURE 1. Screenshot of hardware and analysis settings for a smFRET experiment with 532 nm and 640 nm pulsed interleaved excitation and dual-channel detection, yielding three logical analysis channels.
    Bio&Life Sciences

    Novel microscope for dynamic structural biology with single-molecule FRET

    Maria Loidolt-Krüger
    Dec. 16, 2022
    A new single-photon-counting confocal microscope combines state-of-the-art hardware with cutting-edge software to deliver high-quality data while simplifying daily operation.
    (Image credit: SiberianArt/1132417394/iStock/Getty Images Plus)
    Online
    Executive Forum

    Optimism remains despite headwinds

    Peter Fretty
    Dec. 15, 2022
    We continue Laser Focus World’s annual tradition of looking back at the photonics market, trying to make sense of the trends, and forecasting the year ahead.
    FIGURE 1. Absorption of water and tissue penetration depth at different wavelengths.
    Lasers & Sources

    Medical applications are a surgical fit for 2 µm lasers

    Cory Boone
    Dec. 14, 2022
    Lasers in this wavelength range have become more stable, efficient, cost-effective, and simple to use than ever before, prompting increased incorporation into medical and surgical...
    (Photo credit: Steven Becker)
    Birgit Stiller and Xinglin Zeng in the lab.
    Fiber Optics

    Sound waves propagating in one direction break light transmission reciprocity

    Sally Cole Johnson
    Dec. 13, 2022
    Max Planck Institute for the Science of Light researchers in Germany create a light-driven optical vortex isolator—with potential for selective manipulation of vortex modes solely...
    (Image credit: Wasatch Photonics)
    Pre- vs. post-correction values are shown.
    Test & Measurement

    Getting a good fingerprint via Raman spectra

    Cicely Rathmell
    Dec. 12, 2022
    As applications for Raman spectroscopy expand into nontraditional areas such as medical diagnostics and food quality, the types of answers that can be obtained depends heavily...

    More content from Volume 59, Issue 01

    (Image credit: POSTECH)
    While illuminated by a polarization-independent coherent laser source, the team’s metasurfaces generate ~10 K points over the entire 180-degree space. The depths of the dot arrays illuminated on the objects can be extracted using a stereo-matching algorithm.
    Optics

    Metasurfaces for ultrasmall solid-state LiDAR sensors?

    Sally Cole Johnson
    Dec. 9, 2022
    Nano-optical metasurfaces can give cell phones, augmented and virtual reality (AR/VR), and autonomous vehicles/robots a 360-degree view of their surrounding environment.
    (Courtesy of Florian Ströhl, UiT Arctic University of Norway)
    FIGURE 1. The new microscope re-distributes light from a volume such that many depths are imaged simultaneously next to each other, allowing a fast camera to record the entire volume in a single shot.
    Detectors & Imaging

    Next-generation microscope boosts opportunities

    Justine Murphy
    Dec. 8, 2022
    Multifocus microscope produces multiple 3D images clearer and quicker than conventional technologies with the ability to revolutionize imaging applications.
    (Image credit: Sri Hrushikesh Varma Bhupathiraju)
    FIGURE 1. This image shows the attack region deleted with an 8-degree angle attack.
    Test & Measurement

    LiDAR sensors have fixable security vulnerability

    Sally Cole Johnson
    Dec. 7, 2022
    Researchers discover a security vulnerability attackers can use to selectively remove an entire area of LiDAR field-of-view, so spoofed signals go fully unnoticed by the system...
    FIGURE 1. A 3-g MINI2P miniaturized head-mounted two-photon microscope.
    Bio&Life Sciences

    Two-photon microscopy advances bio research

    Joseph Mastron
    Dec. 6, 2022
    Decades of research focused on two-photon laser scanning microscopy is enabling new ways for neuroscientists to measure in vivo neuronal activity in three dimensions.
    (Image credit: Andong Wang, Pol Sopeña, and David Grojo)
    FIGURE 1. The team split the energy of infrared ultrafast pulses to form ultrafast bursts of less intense pulses to improve localization of excitation. By using “fast enough” bursts, they accumulate enough energy to cross the material modification threshold and add new functionalities inside semiconductor chips.
    Lasers & Sources

    Ultrafast infrared laser bursts enable writing inside semiconductor chips

    Sally Cole Johnson
    Dec. 5, 2022
    Researchers fabricate embedded structures inside semiconductor materials—demonstrating a 3D laser writing method’s potential to take semiconductor manufacturing from a largely...
    (Courtesy of Artem Lomakin)
    FIGURE 1. BaSISS clonal maps trace cancer evolutionary lineages in space.
    Bio&Life Sciences

    Understanding cancer’s genetic makeup could halt its spread

    Justine Murphy
    Dec. 2, 2022
    A molecular microscopy technique is helping researchers more effectively identify cellular DNA and RNA in breast cancer cells. This could lead to development of new treatments...
    (Photo credit: © Gautier DUFAU)
    The Advocate of Optics award presented at an event hosted by the Institut d’Optique Graduate School (IOGS) in France.
    Executive Forum

    Make time for community celebrations

    Peter Fretty
    Dec. 1, 2022
    The recent honor bestowed upon Alain Rousset is a prime example of the type of celebrations the global photonics community needs to continue to embrace.
    Simplified visible optical version of the quantum entanglement diagram disclosed by Pryce and Ward in 1947.
    Science & Research

    Quantum entanglement free of paradoxes

    F. J. Duarte
    Dec. 1, 2022
    While the well-known philosophical path toward quantum entanglement is conceptually attractive, it is fraught with hidden variable theories and paradoxes.
    FIGURE 1. A photovoltaic farm in an arid climate (left) and currently installed power generation capacity and projected solar PV capacity in 2030, to be met by the net-zero emission scenario for 2050 (right). The required annual growth rate (RAGR) amounts to about 25%.
    Laser Processing

    Lasers, biomimetics enable self-cleaning photovoltaic panels

    Tim Kunze
    Nov. 30, 2022
    Dust accumulation on solar modules and mirrors can be removed via a technique that combines lasers and a biomimetic approach.
    (Courtesy of POSTECH)
    2301 Lfw Wn 2 1 Hero
    Bio&Life Sciences

    Microscope component replacement improves photoacoustic imaging

    Justine Murphy
    Nov. 29, 2022
    A super-resolution photoacoustic microscopy system using tapered optical fiber allows researchers to overcome common challenges presented by conventional approaches.
    (Photo credit: TRUMPF Photonic Components)
    Berthold Schmidt, CEO at TRUMPF Photonic Components.
    Executive Forum

    Breaking barriers with VCSEL innovations

    Peter Fretty
    Nov. 28, 2022
    Laser Focus World interviews TRUMPF Photonic Components CEO Berthold Schmidt about its latest VCSEL innovation.
    (Photo credit: Jesper Scheel)
    Marcus Albrechtsen (left) and Søren Stobbe in the lab.
    Optics

    Dielectric nanocavity concentrates light in volume 12X below diffraction limit

    Sally Cole Johnson
    Nov. 25, 2022
    Researchers in Denmark built a dielectric nanocavity that compresses light below the diffraction limit—dispelling a widespread misconception that this was impossible in dielectric...
    (Courtesy of Dr. Arne Wickenbrock)
    Energized by green laser light, the color centers in diamonds have allowed the development of medical diagnostic techniques such as using quantum sensors for viewing brain tissue.
    Bio&Life Sciences

    Quantum technology could aid brain tumor surgery

    Justine Murphy
    Nov. 23, 2022
    Thanks to a German government-funded project, a new quantum sensor has the potential to make brain tumor procedures simpler, safer, and gentler.
    (Photo credit: Meta Reality Labs)
    Natalie Gibson, research scientist at Meta Reality Labs.
    Optics

    Faces in Photonics: Natalie Gibson, Meta Reality Labs

    Peter Fretty
    Nov. 22, 2022
    Meet Natalie Gibson, a research scientist at Meta Reality Labs.