Ring Lasers
Ring lasers are made up of two beams of light with the same polarization going in opposite directions in a closed loop (“counter-rotating”). These are…
Physics
Total Internal Reflection – in Physics
Total internal reflection (TIR) is the phenomenon in which waves arriving at the interface (boundary) of one medium to another (e.g., water to air) are…
Free-electron Laser
A free-electron laser (FEL) is a fourth-generation light source that produces exceptionally bright and brief radiation pulses. It is a type of laser that uses…
Optical Ring Resonator
An optical ring resonator is a collection of waveguides, at least one of which is a closed loop with light input and output. (These can…
Active Laser Medium
The active laser medium (also known as a gain medium or lasing medium) is the source of optical gain within a laser. The gain is…
Laser Science – a branch of optics
Laser science, often known as laser physics, is a discipline of optics that deals with the theory and application of lasers. Lasers are devices that…
Polariton Interferometer
The Polariton Interferometer is a navigation device proposed for military usage due to its independence from regular GPS, which is prone to jamming and has…
Quantum Dots
Quantum dots (QDs), also known as semiconductor nanocrystals, are semiconductor particles a few nanometres in size with optical and electrical properties that differ from those…
Surface Metrology – a subfield of metrology
Surface metrology is a subfield of metrology that measures small-scale features on surfaces. It is the scientific investigation and measurement of surface qualities and properties.…
Three Scientists have Received the Nobel Prize in Physics for their Work on Electrons
Pierre Agostini, Ferenc Krausz, and Anne L’Huillier were awarded a prize of £823,000 for their work on electron dynamics in matter. Three scientists have been…
Researchers Construct a DNA Structure and Cover it With Glass to Produce a Very Robust, Low-Density Material
Strong and lightweight materials have the potential to enhance anything from body armor to automobiles. However, the two traits typically do not coexist. Now, scientists…
The Dynamic Disorder of Atoms can be Seen Via a New “Camera” With a Shutter Speed of One Trillionth of a Second
A novel “camera” that can detect local disorder in materials has been created by researchers. Its distinguishing characteristic is a variable shutter speed: because the…
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