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The new device is a frequency comb - a special type of laser that can generate multiple wavelengths of light, each with a fixed frequency interval. On the spectrogram, it looks a bit like the teeth of a comb. In approximately a quarter century since their first development, these "cursor rulers" have completely transformed various high-precision measurements from timing to molecular detection. In ...
According to reports, a research team at the University of Chicago in the United States recently demonstrated a new method for obtaining mid infrared emission using colloidal quantum dots (QDs), which may open up new applications for mid infrared light sources.Colloidal quantum dots are a type of semiconductor nanocrystal material that provides a promising approach for the synthesis of light sourc...
An international research team from Leibniz University in Hanover and Strathclyde University in Glasgow overturned the previous hypothesis about the influence of multiphoton components in the thermal field and the interference effect of parameterized single photons. The journal Physical Review Letters published the team's research."We have demonstrated through experiments that the interference eff...
The optical properties of photonic crystals are closely related to their lattice constants, which are usually required to be in the same order of magnitude as the operating wavelength. In a crystal material, the photonic crystal structure is formed by the periodic arrangement in space of units whose dielectric constant is different from that of the crystal itself, and whose lattice constant depend...
Quantum optics is a complex field where theoretical and experimental physicists collaborate to achieve breakthroughs in explaining subatomic level phenomena.Recently, Farokh Mivehvar from the University of Innsbruck used the most comprehensive model in quantum optics, the Dicke model, to study the interaction between two groups of atoms in a quantized field. This new study makes it possible to obs...