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Quantum wells
| Glossary Of Laser Terminology |
Thin layers confining carriers in one dimension
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Quantum, латинский
Quantum, английский
- Шаг квантования
- Квант; квант времени
- A brief period of time when a given thread executes in a multitasking operating system. it performs the multitasking before it is rescheduled against other threads with the same priority. previously known as a time slice.” quantum computing / theory
- If the magnitude of a quantity is always an integral multiple of a definite unit, then that unit is called the quantum of the quantity. the photon is a quantum of the electromagnetic field and the meson is considered to be the quantum of the nuclear field.
Quantum (rt), английский
A discrete amount of radiation energy. the quantum energy is e=hu, where u is the frequency of the radiation and h is plank’s constant.
Quantum amplification by stimulated emission, английский
Of radiation квазер, квантовомеханический генератор
Quantum cascade lasers, английский
Semiconductor lasers relying on intersubband transitions, normally emitting in the mid-infrared spectral region
Quantum computer, английский
A machine that relies on the properties of quantum mechanics to perform computations. quantum computers encode information in qubits, which can exist in a linear combination of two states. these states can be physically realized in a number of ways, such as superconducting circuits, trapped ions, optical lattices, and linear optics. computation is performed by operating on the state of these qubits using quantum logic gates. for example, if the qubit is realized as an ion, the quantum logic gate might manipulate the ion’s energy state with lasers.
Quantum confined atoms (qca), английский
Quantum confinement effect, английский
Atoms caged inside nanocrystals.
Quantum cryptanalysis, английский
Quantum cryptographic protocol, английский
Quantum cryptographic system, английский
Quantum cryptography, английский
Methods to encrypt information securely, relying on quantum-mechanical phenomena
Quantum crystallite (quantum dot), английский
Quantum defect, английский
Energy difference between pump and laser photons
Quantum dot, английский
A nanoscale crystalline structure made from cadmium selenide that absorbs white light and then re-emits it a couple of nanoseconds later in a specific color. the quantum dot was originally investigated for possible computer applications. recently, researchers are investigating the use of quantum dots for medical applications, using the molecule-sized crystals as probes to track antibodies, viruses, proteins, or dna within the human body.
Quantum dot nanocrystals (qdn), английский
Quantum dots, английский
Microscopic structures confining charge carriers in three dimensions
Quantum efficiency, английский
- The ratio of hole-electron pairs or photoelectrons to the number of photons received by a photodetector. the quantum efficiency can be as high as 80% for an apd and 25% for a pmt.
- Percentage of input photons which contribute to a desired effect
Quantum efficiency (qe), английский
The ratio of the number of charge carriers collected by a photovoltaic cell to the number of photons of a given energy shining on the cell. quantum efficiency relates to the response of a solar cell to the different wavelengths in the spectrum of light shining on the cell. qe is given as a function of either wavelength or energy. optimally, a solar cell should generate considerable electrical current for wavelengths that are most abundant in sunlight.
Quantum est in rebus inane!), латинский
Quantum gis, английский
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Dielectric coatings, английский
Thin-film coatings made of transparent dielectric materials, e.g. for laser mirrors or anti-reflection coatings
Gain bandwidth, английский
The width of the optical frequency range in which significant gain is available from an amplifier
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