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A tunable laser is a laser whose wavelength of operation can be altered in a controlled manner. ... (LBIC) experiment, from which the external quantum efficiency ...
The laser induces local thermal gradients in the device, which result in changes to the amount of power that the device uses. A laser is scanned over the surface of the device while it is under electrical bias. The device is biased using a constant current source, and the power supply pin voltage is monitored for changes.
Laser-induced breakdown spectroscopy (LIBS) is a type of atomic emission spectroscopy which uses a highly energetic laser pulse as the excitation source. [1] [2] The laser is focused to form a plasma, which atomizes and excites samples. The formation of the plasma only begins when the focused laser achieves a certain threshold for optical ...
Glow-in-the-dark coughs and sneezes? In the coronavirus era, this is what it takes for scientists to figure out which masks work best at stopping aerosol droplets from spreading after a cough or a ...
The first large-scale experiments were performed in June 2009 [7] and the first "integrated ignition experiments" (which tested the laser's power) were declared completed in October 2010. [ 8 ] From 2009 to 2012 experiments were conducted under the National Ignition Campaign, with the goal of reaching ignition just after the laser reached full ...
In materials science, Direct Laser Interference Patterning (DLIP) is a laser-based technology that uses the physical principle of interference of high-intensity, coherent laser pulses to produce functional periodic microstructures. [1] [2] To achieve interference, the beam is divided by a beam splitter, specialized prisms, [3] or other elements.
Laser-induced fluorescence (LIF) or laser-stimulated fluorescence (LSF) [1] is a spectroscopic method in which an atom or molecule is excited to a higher energy level by the absorption of laser light followed by spontaneous emission of light. [2] [3] It was first reported by Zare and coworkers in 1968. [4] [5]
In the basic double-slit experiment, a beam of light (usually from a laser) is directed perpendicularly towards a wall pierced by two parallel slit apertures.If a detection screen (anything from a sheet of white paper to a CCD) is put on the other side of the double-slit wall (far enough for light from both slits to overlap), a pattern of light and dark fringes will be observed, a pattern that ...