Laser systems, as physical systems, comprise an optical gain medium, an energy pump source, and an optical resonator configured to produce coherent, monochromatic, and highly directional electromagnetic radiation via stimulated emission. The gain medium (solid-state, gas, liquid, or semiconductor) is excited by optical, electrical, or chemical pumping, creating a population inversion between quantized energy levels. The resonator, typically a pair of mirrors or integrated waveguide structures, provides optical feedback and mode selection, defining spatial and spectral properties. System performance is characterized by thresholds, efficiency, beam quality (M²), temporal regime (CW or pulsed), and stability against thermal, mechanical, and nonlinear optical effects.
Researchers have demonstrated a solid-state organic laser microcavity fabricated entirely by solution processing. The device operates in the strong light–matter coupling regime, where light and matter form hybrid states called ...
Condensed Matter
Aug 6, 2026
0
67
An international team of researchers has succeeded in producing atomic quantum gas mixtures with an unprecedented particle flux. In the journal Nature Communications, the scientists report on experiments conducted with the ...
Optics & Photonics
Aug 5, 2026
0
46
An international team of researchers from École Polytechnique, Collège de France and Helmholtz-Zentrum Dresden-Rossendorf (HZDR) has achieved a world first: the experimental realization of an all-optical photonic time crystal ...
Optics & Photonics
Jul 30, 2026
0
241
There's a nice kind of irony buried in this story: One of the most sensitive instruments ever built, capable of measuring distortions smaller than the width of a proton, has been quietly held back by something as mundane ...
Astronomy
Jul 30, 2026
0
45
Researchers have developed and tested an infrared spectroscopy system that can rapidly detect chemical aerosols from a distance by using light reflected from common surfaces such as traffic signs, tree trunks or painted surfaces. ...
Optics & Photonics
Jul 30, 2026
0
20
Resolving a long-standing problem in semiconductor physics and optoelectronics, a team of researchers from Skoltech—a VEB.RF group institution—and their colleagues from ITMO University and HSE University have for the first ...
Condensed Matter
Jul 29, 2026
0
78
Laser dicing, a technique that uses focused laser pulses to separate individual chips from a semiconductor wafer, is increasingly favored over mechanical blade cutting because it can process delicate, low-strength materials ...
Optics & Photonics
Jul 27, 2026
0
12
Many molecules exist in two mirror-image forms—like left and right hands—that look identical but can behave very differently, especially in biological systems and pharmaceuticals. Distinguishing between these enantiomers ...
Optics & Photonics
Jul 26, 2026
0
77
Photographs can reveal things that are otherwise impossible for the naked eye to see, be they distant galaxies or microscopic cells. Researchers at Osaka Metropolitan University have developed a practical and versatile imaging ...
Nanophysics
Jul 24, 2026
0
109
Quantum networks, systems consisting of multiple connected nodes or devices that can transmit quantum information to one another, have the potential to advance future communications. These networks typically leverage entanglement, ...
