Lasers & Sources

Credit: KAIST
(L-R) Junyong Choi, Woonsong Jeong, Jungwon Kim, and Jihoon Baek inside the antenna receiver room at KVN Pyeongchang radio telescope.
Researchers apply the precision of optical frequency combs to radio telescopes to synchronize the observation timing and phase of faint cosmic signals—and lay the foundation for...
Jan. 27, 2026
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Credit: University of Applied Sciences Biberach (https://p-inst.com/life-science)
Widefield microscope image of a DAPI-stained mouse head; sagittal plane: 4x, 0.2 NA.
Credit: Capt. Ray Jourdain, Ice Pilots, Canada
FIGURE 1. Icing accumulating on deck due to prow spray.
Credit: Kunyan Zhang/University of California, Berkeley
A two-layer Janus TMD converts light through second harmonic generation (SHG), in which the material emits light at twice the frequency of the incoming beam (left). The SHG beam usually forms a six-pointed flower shape, but certain wavelengths of light distort it. Upper right: Symmetrical flower pattern in gray and asymmetrical SHG signal pattern in red. Lower right: Optical image of a sample. Credit: Kunyan Zhang/University of California, Berkeley

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