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Unlike typical interband semiconductor lasers that emit electromagnetic radiation through the recombination of electron – hole pairs across the material band gap, QCLs are unipolar and laser emission is achieved through the use of intersubband transitions in a repeated stack of semiconductor multiple quantum well heterostructures, an idea first proposed in the paper " Possibility of amplification of electromagnetic waves in a semiconductor with a superlattice " by R. F.
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Unlike and typical
Unlike the typical hijackings of land vehicles or ships, skyjacking is not usually committed for robbery or theft.
Unlike the typical idea of an arcology-clean, healthy, and safe for the environment, " hives " are portrayed as dirty, diseased, overcrowded and the area around them as highly polluted.
Unlike lemurids, they have long upper incisors, although they do have the comb-like teeth typical of all strepsirhines.
Unlike the typical menu selections of many other Chinese cuisines, Teochew restaurant menus often have a dessert section.
Unlike conventional harmonicas, blowing and drawing produce the same notes because its tuning is closer to the note layout of a typical Asian tremolo harmonica or the Polyphonias.
Unlike mathematical integers, a typical datum in a computer has some minimal and maximum possible value.
Unlike typical Western poetry, however, the number of unstressed syllables could vary somewhat.
Unlike Monte Carlo algorithms ( such as path tracing ) which handle all types of light paths, typical radiosity methods only account for paths which leave a light source and are reflected diffusely some number of times ( possibly zero ) before hitting the eye.
Unlike large limestone areas such as Florida, Cuba, and the Yucatan Peninsula, or the Bahamas, which is a small island group composed of coral and sand, St. Lucia is a typical Windward Island formation of volcanic rock that came into existence long after much of the region had already been formed.
Unlike a typical finger or vertebral junctions, each TMJ actually has two joints, which allows it to rotate and to translate ( slide ).
Unlike his prescriptive attitude regarding the plot ( unity of action ), Aristotle here merely remarks on the typical duration of a tragedy's action, and does not suggest any kind of imperative that it always ought to be so.
Unlike the bidirectional W8JK designs, the ZL Special is essentially a unidirectional beam ; the polar plots of the ZL special and the HB9CV are heart shaped ( cardioid ), while the typical Yagi antenna has a large forward lobe and a smaller back lobe.
Unlike a typical subwoofer driver, which produces audible vibrations, tactile transducers produce low-frequency vibrations that are designed to be felt by individuals who are touching the transducer or indirectly through a piece of furniture or a wooden floor.
Unlike the commoner status of a British peer's wife and descendants ( yet typical of the nobility of every continental European country ), the legitimate children and male-line descendants of any French nobleman ( whether titled or not, whether possessing a French peerage or not ) were also legally noble ad infinitum.
Unlike the rest of the cities in the country Sevastopol officially does not have a typical mayor due to its status, functions of which conducts the head of Sevastopol Municipality State Administration or a city governor appointed by the President of Ukraine.
Unlike typical cassette decks that use a single head for both record and playback plus a second head for erasing, the Nakamichi 1000, like the better reel-to-reel recorders, used three separate heads to optimize these functions.
Unlike typical film festivals, Ebertfest does not accept submissions.
Unlike typical systems of the era, TENEX deliberately used long command names and even included noise words to further expand the commands for clarity.
Unlike typical American crosswords, the grid entries are not " fully checked "; instead, roughly half the letters in each entry are checked.
Unlike ordinary sausages it is a typical home dish, not sold at hot dog stands.
Unlike many spatial-domain algorithms, the phase correlation method is resilient to noise, occlusions, and other defects typical of medical or satellite images.
Unlike previous Majapahit temples that demonstrate typical Hindu architecture of high-rise towering structure, the shape of these temples are step pyramid, quite similar to Mesoamerican pyramids.
Unlike a typical private pension plan, the Social Security Trust Fund does not hold any marketable assets to secure workers ' paid-in contributions.
Unlike typical coining applications, in this case the goal of coining is to create a flat, rather than patterned, surface.
Unlike typical NiCd cells, which are sealed, vented cells have a vent or low pressure release valve that releases any generated oxygen and hydrogen gases when overcharged or discharged rapidly.
Unlike and semiconductor
Unlike so-called fabless semiconductor companies, STMicroelectronics owns and operates its own semiconductor wafer fabs.
A new type of CFQD can be made from rare earth ( RE ) doped oxide colloidal phosphor nanoparticles .< ref >" PhosphorDots < sup > TM </ sup >" http :// www. nanomaterialstore. com / nano-phosphor. php </ ref > Unlike semiconductor nanoparticles, excitation was due to UV absorption of host material, which is same for different RE doped materials using same host.
Unlike the older one-dimensional barcode that was designed to be mechanically scanned by a narrow beam of light, the QR code is detected as a 2-dimensional digital image by a semiconductor image sensor and is then digitally analyzed by a programmed processor.
Unlike most nuclear power sources, which use nuclear radiation to generate heat, which then generates electricity ( thermoelectric and thermionic sources ), betavoltaics use a non-thermal conversion process, using a semiconductor p-n junction.
Unlike most nuclear power sources, which use nuclear radiation to generate heat, which then is used to generate electricity ( thermoelectric and thermionic sources ), betavoltaics use a non-thermal conversion process ; converting the electron-hole pairs produced by the ionization trail of beta particles traversing a semiconductor.
Unlike and lasers
Unlike the movie, where the units shoot beams similar to lasers, the enemy units in this game shoot projectiles resembling fireballs, in order to give the player a chance to destroy the fired shots.
Unlike gas, liquid, or solid-state lasers such as diode lasers, in which electrons are excited in bound atomic or molecular states, FELs use a relativistic electron beam as the lasing medium which moves freely through a magnetic structure, hence the term free electron.
Unlike HeNe lasers, the energy level transitions that contribute to laser action come from ions.
Unlike Nd: YAG lasers, the output of an Er: YAG laser is strongly absorbed by water.
Unlike Lippmann colour photography, however, the lasers, the subject and the recording medium must all be kept stable to within one quarter of a wavelength during the exposure in order for the standing waves to be recorded adequately or at all.
Unlike and emit
Unlike conventional backlit flat panel displays which emit light, electronic paper displays reflect light like ordinary paper, making it more comfortable to read, and the surface has a wider viewing angle than conventional displays.
Unlike laser printers which have been criticized for their environmental emissions, line matrix printers don ’ t emit harmful particulates into the workplace.
Unlike paper which reflects ambient light, both CRT and LCD displays emit light of sufficient brightness to overcome ambient light.
Unlike nuclear tools, these natural gamma ray tools do not emit any radiation.
Unlike ordinary stars, they are strongly affected by the outward pressure of the light that they emit,
Unlike and electromagnetic
Unlike beta decay, alpha decay is governed by the interplay between the nuclear force and the electromagnetic force.
Unlike all other forces ( electromagnetic, weak, and gravitational ), the strong force does not diminish in strength with increasing distance.
Unlike gases, plasmas may self-generate magnetic fields and electric currents, and respond strongly and collectively to electromagnetic forces.
Unlike electromagnetic radiation in a box, there is a finite number of phonon energy states because a phonon cannot have infinite frequency.
Unlike home users, power providers are more able to consider widespread deployment of fiber optic cables immune to electromagnetic interference ( and which do not generate any ) and for which mature devices ( switches, repeaters ) are available.
Unlike Weyl's approach, Riemannian geometry was maintained, and the extra dimension allowed for the incorporation of the electromagnetic field vector into the geometry.
Unlike classical phenomena such as the nuclear, electromagnetic, and gravitational fields, entanglement is invariant under distance of separation and is not subject to relativistic limitations such as speed of light.
Unlike the soot example above, commercial PECVD relies on electromagnetic means ( electric current, microwave excitation ), rather than a chemical reaction, to produce a plasma.
Unlike an incandescent lamp or conventional fluorescent lamps, there is no electrical connection going inside the glass bulb ; the energy is transferred through the glass envelope solely by electromagnetic induction.
Unlike in the hydrogen atom, where the binding between electron and proton is dominated by the electromagnetic interaction, kaons and protons interact also to a large extent by the strong interaction.
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