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Drift mobility of long-living excitons in coupled GaAs quantum wells
Drift mobility of long-living excitons in coupled GaAs quantum wells

PPTX - ecars
PPTX - ecars

... Kokkalis, P., Study of the tropospheric aerosols using ground-based and space-borne techniques – Measurement analysis and statistical processing, Ph.D. Thesis (in Greek), NTUA, Greece, 2014. Marcu, L., et a., Fluorescence Lifetime Spectroscopy and Imaging: Principles and Applications in Biomedical D ...
application to low-dimensional semiconductor
application to low-dimensional semiconductor

... resulting in a bigger generation volume. The diffusion length, on the other hand, is a material parameter, which can be influenced by the sample temperature. For a given excitation density and sample temperature the only free parameter is the acceleration voltage, which determines the size of the ge ...
Light Scattering of Semiconducting Nanoparticles
Light Scattering of Semiconducting Nanoparticles

QCL FAQ List
QCL FAQ List

Permanently reconfigured metamaterials due to
Permanently reconfigured metamaterials due to

... 4 May 2015 | Vol. 23, No. 9 | DOI:10.1364/OE.23.011586 | OPTICS EXPRESS 11586 ...
Teletrac Stabilized Single Frequency Long HeNe Laser
Teletrac Stabilized Single Frequency Long HeNe Laser

laser
laser

... • Photolithography (also called optical lithography) is a process used in microfabrication to selectively remove parts of a thin film (or the bulk of a substrate). • It uses light to transfer a geometric pattern from a photomask to a light-sensitive chemical (photoresist, or simply "resist") on the ...
Microwave and Millimeter Wave Signal Generation Using Mode
Microwave and Millimeter Wave Signal Generation Using Mode

... favored time for light to pass through the laser. After many round trips in the laser cavity, an optical pulse which is very much narrower than the electrical pumping waveform is formed. In order to get very short optical pulses from an actively modelocked laser, the electrical modulation pulses sho ...
A sub-Doppler resolution double resonance molecular beam infrared È …
A sub-Doppler resolution double resonance molecular beam infrared È …

... interest in the chemical community for quite some time.4,5 Recent experimental and theoretical reviews6–9 have demonstrated the importance of understanding the nature of intramolecular vibrational energy redistribution 共IVR兲 in fields such as chemical dynamics and laser selective chemistry. Recent f ...
Word - Research
Word - Research

... This laser is capable of pulsed operation up to 20 Hz and can emit a variety of UV wavelengths that depend on the excimer gas, as listed below: ...
How a structured vibrational environment controls the performance
How a structured vibrational environment controls the performance

... charge separation. Indeed, fluorescence line narrowing experiments have given evidence of a highly structured spectral density of fluctuations associated to electronically excited chromophores21 as shown in Fig. 2 (b). Thus in this work we examine two key questions: (i) how does the statistics of el ...
Fine-tuning of a diode laser wavelength with a liquid crystal
Fine-tuning of a diode laser wavelength with a liquid crystal

Current status of the development of the Kumgang
Current status of the development of the Kumgang

... energy and a high repetition rate [1]. The coherent beam combination technique utilizes a small-gain medium that can be cooled rapidly, allowing it to operate at a high repetition rate with a high output energy level. Furthermore, the phase-conjugation property of the SBSPCM prevents the degradation ...
experimental
experimental

A cathodoluminescence study of CdTe thin
A cathodoluminescence study of CdTe thin

Laser Safety Training
Laser Safety Training

... Laser Hazard – Hazardous Materials • Reaction induced by lasers can release hazardous particulate and gaseous products • Ignition of gases or fumes from the laser • Engineering controls (i.e. ventilation) should be used • All hazardous materials must be properly used, stored and controlled • Obtain ...
Laser Printer Components:
Laser Printer Components:

Motion and Recombination of Electrons and Holes
Motion and Recombination of Electrons and Holes

Light From Silicon
Light From Silicon

... Fiber-optic links are now reserved mostly for long-distance telecommunications. But with huge multimedia files hopping from computer to computer, that kind of bandwidth is increasingly needed everywhere, from local networks right down to the links between chips inside computers. And even in the long ...
Terahertz Detector Utilizing Two-dimensional Electronic Fluid
Terahertz Detector Utilizing Two-dimensional Electronic Fluid

... rather than a 2D-electron gas (2DEG) [3], [4]. This electronic fluid is described by the same equations as water in a shallow channel. Wave propagation in the electronic fluid can be used as the basis for a new generation of millimeter and submillimeter-wave devices—a FET emitting far infrared radia ...
High-power, picosecond, 10 µm pulses via
High-power, picosecond, 10 µm pulses via

Experiment 2-6
Experiment 2-6

Sound Waves - Cloudfront.net
Sound Waves - Cloudfront.net

Soft Semiconductor Devices
Soft Semiconductor Devices

... include memories and transistors: Information can be stored in the conformation of molecules, potentially leading to very high density memories; and molecular transistors that change shape under bias could exhibit subthreshold slopes of << 60 mV/decade.[1] Indeed, as an example of the potential of N ...
< 1 2 3 4 5 >

Sound amplification by stimulated emission of radiation



SASER is a device capable of emitting acoustic radiation. By focusing and controlling the sound waves, it enables us to utilise them as accurate and high-speed carriers of information in many kinds of applications, similar to the use of light emitted by laser.Acoustic radiation (sound waves) can be emitted by using the process of sound amplification based on stimulated emission of phonons. Sound (or lattice vibration) can be described by a phonon just as light can be considered as photons, and therefore one can state that SASER is the acoustic analogue of the laser.In a SASER device, a source (e.g. an electric field as a pump) produces sound waves (lattice vibrations, phonons) which travel through an active medium. In this active medium, a stimulated emission of phonons leads to amplification of the sound waves, resulting in a sound beam coming out of the device. The sound wave beams emitted from such devices are highly coherent.The first successful SASERs were developed in 2010.
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