Lasers & Sources

Credit: B. Schröder/HZDR
A THz electromagnetic wave induces strong, fast temporal modulations that result in a photonic time crystal—a.k.a. a crystal lattice in time for photons.
In a breakthrough, researchers in France and Germany demonstrate a photonic time crystal—with optical properties that change over time—and it has the potential to dramatically...
Aug. 13, 2026
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Following the Photons: A Photonics Podcast
Aug. 11, 2026
FIGURE 1. Longitudinal multimode spectrum of conventional 488-nm Fabry-Perot laser diode (left) and of single-frequency DFB laser diode (right) with monolithic grating. Chip schematics are shown in inset.
Aug. 11, 2026
Credit: Vexlum
Vexlum’s CEO Jussi-Pekka Penttinen (left) and Stefan Truppe, managing director of the company’s new U.K. R&D lab.
Aug. 5, 2026
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Following the Photons: A Photonics Podcast
Aug. 4, 2026
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Aug. 3, 2026
Credit: Marcus Albrechtsen/Niels Bohr Institute
Illustration of the telecom single-photon device. A resonant pulsed laser (top left) excites a single quantum dot embedded within a photonic-crystal waveguide, and the dot emits telecom-wavelength photons one at a time into the on-chip circuit. Gold contacts apply the bias that stabilizes the dot's charge environment.
Aug. 3, 2026
Credit: ESA
FIGURE 1. LISA will use three spacecraft separated by ~2.5 million kilometers to exchange laser beams and detect low-frequency gravitational waves.
July 31, 2026
Credit: Lidrotec
FIGURE 1. Schematic of the LidroCUT process.
July 29, 2026

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