Geiger-mode avalanche photodiodes (GM-APDs) are highly sensitive light detectors, capable of detecting single photons.

French physicist Louis de Broglie proposed in 1924 that particles of matter have wave-like characteristics, with a wavelength (λ) given by the equation λ = h/p, where h is Planck's constant and p is ...

As waves travel, they set up patterns of disturbance. The amplitude of a wave is its maximum disturbance from rest (its undisturbed position). Key fact It is important to note that the amplitude is ...

Bug killer: prototype of the short wavelength UV LED irradiation system with 118 LEDs. The inset shows a detail of the LED array. (Courtesy: FBH/P. Immerz) An array of low-voltage LEDs that emit short ...

Brain tissue ablation: A pre-surgery OCT angiography image of the mouse brain (A) overlayed on the post-surgery image (B) shows the coagulation margins. (Courtesy: Biomed. Opt. Express ...

A French-Japanese collaboration has just developed an organic ultraviolet (UV) laser emitting at a record wavelength of 358.5 ...

"Our tunable-wavelength nitride semiconductor laser oscillates in the 405 nm band, but its structure can be readily adapted to the 460 nm band as well," explains first author Taisei Kusui. "Combined ...