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Quantum mechanical state change
Spontaneous emission is the process in which a quantum mechanical system (such as a molecule, an atom or a subatomic particle) transitions from an excited
Spontaneous_emission
Type of light that can be emitted by an optical amplifier
Amplified spontaneous emission (ASE) or superluminescence is light, produced by spontaneous emission, that has been optically amplified by the process
Amplified spontaneous emission
Amplified_spontaneous_emission
Device that emits light via optical amplification
with spontaneous emission into the lasing mode. This initial light is then amplified by stimulated emission in the gain medium. Stimulated emission produces
Laser
Release of a photon triggered by another
identical to the photons of the incident wave. This is in contrast to spontaneous emission, which occurs at a characteristic rate for each of the atoms/oscillators
Stimulated_emission
When a system has more excited-state members than ground-state
between photons emitted from a group of excited atoms; in other words, spontaneous emission is incoherent. In the absence of other processes, the number of atoms
Population_inversion
Spontaneous sleep orgasm
A nocturnal emission or sleep orgasm is a spontaneous occurrence during sleep of ejaculation and orgasm for a male, and vaginal lubrication and/or orgasm
Nocturnal_emission
Laser technology
Self-amplified spontaneous emission (SASE) is a process within a free-electron laser (FEL) by which a laser beam is created from a high-energy electron
Self-amplified spontaneous emission
Self-amplified_spontaneous_emission
Frequencies of light emitted by atoms or chemical compounds
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to electrons making
Emission_spectrum
Quantities describing probability of absorption or emission of light
absorption or emission of a photon by an atom or molecule. The Einstein A coefficients are related to the rate of spontaneous emission of light, and the
Einstein_coefficients
Lowest possible energy of a quantum system or field
supported by Theodore Welton (1948), who argued that spontaneous emission "can be thought of as forced emission taking place under the action of the fluctuating
Zero-point_energy
Quantum phenomenon
system's spontaneous emission rate by its environment. In the 1940s Edward Mills Purcell discovered the enhancement of spontaneous emission rates of atoms
Purcell_effect
Elementary particle or quantum of light
the reverse process, there are two possibilities: spontaneous emission of a photon, or the emission of a photon initiated by the interaction of the atom
Photon
Topics referred to by the same term
bacterial peritonitis Spontaneous combustion Spontaneous declaration Spontaneous emission Spontaneous fission Spontaneous generation Spontaneous human combustion
Spontaneous
Type of radioactive decay
between nucleons. Most neutron emission outside prompt neutron production associated with fission (either induced or spontaneous), is from neutron-heavy isotopes
Neutron_emission
Form of radioactive decay
Spontaneous fission (SF) is a form of radioactive decay in which a heavy atomic nucleus splits into two or more lighter nuclei. In contrast to induced
Spontaneous_fission
Spectral linewidth of a laser beam
{\displaystyle } iv. one photon is coupled into the lasing mode by spontaneous emission during the photon-decay time τ c {\displaystyle \tau _{\rm {c}}}
Laser_linewidth
Optoelectronics component
forward direction, becomes optically active and generates amplified spontaneous emission over a wide range of wavelengths. The peak wavelength and the intensity
Superluminescent_diode
Apparatus for trapping and cooling neutral atoms
MOT is able to trap and cool atoms over repeated absorption and spontaneous emission cycles with initial velocities of hundreds of meters per second down
Magneto-optical_trap
Semiconductor laser
is generated in the form of an emitted photon. This is spontaneous emission. Stimulated emission can be produced when the process is continued and further
Laser_diode
German-born theoretical physicist (1879–1955)
Einstein wrote a paper which introduced the concepts of spontaneous emission and stimulated emission, the latter of which is the core mechanism behind the
Albert_Einstein
Various physical phenomena
— Robert H. Dicke, 1954 In quantum optics, superradiance is a form of spontaneous emission that occurs when a group of N {\displaystyle N} emitters, such as
Superradiance
Optical Cavity
light source via positive feedback, a process known as amplified spontaneous emission or ASE. Nanophotonic resonators offer inherently higher light energy
Nanophotonic_resonator
Device that amplifies an optical signal
stimulated emission of a photon at the signal wavelength back to a lower energy level. The excited ions can also decay spontaneously (spontaneous emission) or
Optical_amplifier
Laser technology
single exciton due to spontaneous emission leads to the emission of a single photon. Due to interactions between excitons, the emission when the quantum dot
Quantum dot single-photon source
Quantum_dot_single-photon_source
Spontaneous emission of light by a substance by non-thermal processes
In the broad chemical/photochemical sense, luminescence is the spontaneous emission of radiation from an electronically or vibrationally excited species
Luminescence
Female entity in Near Eastern mythology
female. And she becomes hot from the fornication of men, through spontaneous emission. And enough of this. Samael is called the Slant Serpent, and Lilith
Lilith
Distinctive narrow spectral feature of chemical species
broadening caused by the spontaneous radiative decay. A short lifetime will have a large energy uncertainty and a broad emission. This broadening effect
Spectral_line
Spectroscopic technique
is given by the ratio of the Stokes and anti-Stokes intensity of the spontaneous Raman signal. Raman spectroscopy can also be used to observe other low
Raman_spectroscopy
Emission of light by a substance that has absorbed light
_{i}{k}_{i}}}} where k f {\displaystyle {k}_{f}} is the rate constant of spontaneous emission of radiation and ∑ i k i {\displaystyle \sum _{i}{k}_{i}} is the
Fluorescence
Decay of nuclear spin polarization in MRI and NMR
interaction of a nucleus with its external environment rather than by spontaneous emission. This interaction may be through the electrical or magnetic fields
Relaxation_(NMR)
Periodic optical nanostructure that affects the motion of photons
gives rise to distinct optical phenomena, such as inhibition of spontaneous emission, high-reflecting omni-directional mirrors, and low-loss-waveguiding
Photonic_crystal
Input power level at which a laser generates light primarily by stimulated emission
at which a laser's output is dominated by stimulated emission rather than by spontaneous emission. Below the threshold, the laser's output power rises
Lasing_threshold
Laser pulsing technique
gain medium increases as the medium is pumped. Due to losses from spontaneous emission and other processes, after a certain time the stored energy will
Q-switching
Model in quantum optics
(in the form of a bath of electromagnetic radiation that can cause spontaneous emission and absorption). It was originally developed to study the interaction
Jaynes–Cummings_model
Bombarding atomic nuclei to give off very short-wavelength light
In physics, induced gamma emission (IGE) refers to the process of fluorescent emission of gamma rays from excited nuclei, usually involving a specific
Induced_gamma_emission
Theoretical framework in physics
electromagnetic field, but it was unable to explain spontaneous emission, where an electron spontaneously decreases in energy and emits a photon even without
Quantum_field_theory
Spectroscopic method
higher energy level by the absorption of laser light followed by spontaneous emission of light. It was first reported by Zare and coworkers in 1968. LIF
Laser-induced_fluorescence
Laser fundamental design principles
medium, produced by spontaneous emission, is reflected by the mirrors back into the medium, where it may be amplified by stimulated emission. The light may
Laser_construction
Device that emites acoustic radiation
physicists were searching for materials in which stimulated emission rather than spontaneous emission, is the dominant decay process. A device was first experimentally
Sound amplification by stimulated emission of radiation
Sound_amplification_by_stimulated_emission_of_radiation
Laser cooling technique
is the temperature associated with the momentum gained from the spontaneous emission of a photon. The Doppler limit has been verified with a gas of metastable
Doppler_cooling
Background energy existing in space
energy can be experimentally observed in various phenomena such as spontaneous emission, the Casimir effect, and the Lamb shift, and are thought to influence
Vacuum_energy
Simultaneous absorption of two photons by a molecule
where the excited state produced by two-photon absorption decays by spontaneous emission of a photon to a lower energy state. Relation between the two-photon
Two-photon_absorption
Sound from the inner ear
otoacoustic emissions: spontaneous otoacoustic emissions (SOAEs), which occur without external stimulation, and evoked otoacoustic emissions (EOAEs), which
Otoacoustic_emission
Study involving matter and electromagnetic radiation
portion. Emission spectroscopy: Emission indicates that radiative energy is released by the material. A material's blackbody spectrum is a spontaneous emission
Spectroscopy
Skin treatment
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Photorejuvenation
Number of available physical states per energy unit
different consequences for spontaneous emission. In photonic crystals, near-zero LDOS are expected, inhibiting spontaneous emission. Similar LDOS enhancement
Density_of_states
Ultraviolet source based on spontaneous emission of excimer molecules
excimer lamp (or excilamp) is a source of ultraviolet light based on spontaneous emission of excimer (exciplex) molecules. Excimer lamps are quasimonochromatic
Excimer_lamp
Light emission from substances after they absorb photons
these conditions, coherent processes contribute significantly to the spontaneous emission. The decay of polarization creates excitons directly. Detecting photoluminescence
Photoluminescence
avalanche photodiode APM – additive-pulse mode locking ASE – amplified spontaneous emission ATD – above-threshold dissociation ATI – above-threshold ionization
Laser_acronyms
Spectral density of light emitted by a black body
physical body spontaneously and continuously emits electromagnetic radiation and the spectral radiance of a body, Bν, describes the spectral emissive power per
Planck's_law
American physicist
fabricated throughout the world. His seminal paper reporting inhibited spontaneous emission in photonic crystals is among the most highly cited papers in physics
Eli_Yablonovitch
1993 physics textbook by Peter W. Milonni
by Peter W. Milonni in 1993. The book covers zero-point energy, spontaneous emission, the Casimir effect, the van der Waals force, the Lamb shift and
The_Quantum_Vacuum
Laser using electron beam in vacuum as gain medium
self-amplified spontaneous emission (SASE), which leads to microbunching. Initially all electrons are distributed evenly and emit only incoherent spontaneous radiation
Free-electron_laser
beam ALKA All gas-phase iodine laser Ambient ionization Amplified spontaneous emission Analytical chemistry Aneutronic fusion Antiproton Decelerator Apache
List_of_laser_articles
Type of laser
through the gain medium. The emitted radiation, based on amplified spontaneous emission, has relatively low spatial coherence. The line is mostly Doppler
X-ray_laser
Night spirits in Jewish mythology
Samael to fornicate with men who "sleep below in the impurity of spontaneous emission" and from them are born the demons, spirits, and lilin, who are called
Lilin
_{\rm {e}}~} and σ a {\displaystyle ~\sigma _{\rm {a}}~} are effective emission and absorption cross-sections. In the case of non-pumped medium, the gain
Gain_(laser)
Transfer of a bound electron to a more energetic state
(deexcitation). This is accompanied by the emission of a photon (radiative relaxation/spontaneous emission) or by a transfer of energy to another particle
Electron_excitation
Laser cooling technique
negligible compared with the vibrational quantum energy, subsequent spontaneous emission occurs predominantly at the carrier frequency. This means that the
Resolved_sideband_cooling
Arrangement of mirrors
larger than in any other cavity design. This prevents amplified spontaneous emission and is important for designing high power amplifiers with good beam
Optical_cavity
Type of laser
beam, thus increasing beam quality and cutting off some amplified spontaneous emission and to completely deplete the inversion in the gain medium. The pulses
Titanium-sapphire_laser
Optical component allowing the transmission of light in only one direction
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Optical_isolator
Number used to evaluate the performance of an amplifier
large n the variance of photons is Gn(2nsp(G-1)+1) where nsp is the spontaneous emission factor. One obtains SNRpnf,out = G2n2/(Gn(2nsp(G-1)+1)) = n/(2nsp(1-1/G)+1/G)
Noise_figure
Nonlinear optical process
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Harmonic_generation
Indian physicist
Theories of Spontaneous Emission and their Relation to other Approaches" at Springer. This book on light–matter interaction and spontaneous decay has since
Girish_Saran_Agarwal
Inelastic scattering of photons by matter
the phonon energies. The initial Raman spectrum is built up with spontaneous emission and is amplified later on. At high pumping levels in long fibers
Raman_scattering
Recreational shooting sport and game
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Laser_tag
Laser which uses a solid gain medium
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Solid-state_laser
3D printing technique
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Selective_laser_sintering
Semen discharge from the male reproductive tract
male human sexual development. Ejaculation can occur spontaneously during sleep (a nocturnal emission or "wet dream") or in rare cases because of prostatic
Ejaculation
Type of radioactive decay
in mass by less than 2me, cannot spontaneously decay by positron emission. These isotopes are used in positron emission tomography, a technique used for
Positron_emission
Electric light that produces light using LEDs
light sources, but laser diodes rely on stimulated emission, whereas LEDs use spontaneous emission. General-purpose lighting requires a white light, emulating
LED_lamp
Source of optical gain in a laser
and σep are the same for stimulated emission; 1 τ {\displaystyle {\tfrac {1}{\tau }}} is rate of the spontaneous decay of the upper level. Then, the
Active_laser_medium
High-energy detection
process of spontaneous emission to improve scintillation. This approach is based on the Purcell effect to enhance the spontaneous emission by manipulating
Nanophotonic_scintillators
French fusion research project
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Laser_Mégajoule
Study of matter-light interactions at small scales
model by the introduction of the three processes of stimulated emission, spontaneous emission and absorption (electromagnetic radiation). The largest steps
Atomic, molecular, and optical physics
Atomic,_molecular,_and_optical_physics
Nineteenth letter in the Greek alphabet
relativity Shear stress in continuum mechanics The lifetime of a spontaneous emission process Tau, an elementary particle in particle physics Tau in astronomy
Tau
Measure of laser beam quality
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
M_squared
Multinational X-ray research laser facility in Germany
in the emission of X-rays whose wavelength is in the range of 0.05 to 4.7 nm. The X-rays are generated by self-amplified spontaneous emission (SASE),
European_XFEL
Damped oscillation in quantum optics
single-mode field confined to a limited volume V in an optical cavity. Spontaneous emission is a consequence of coupling between the atom and the vacuum fluctuations
Vacuum_Rabi_oscillation
1986 nuclear accident in the Soviet Union
"Radiation damages and self-sputtering of high-radioactive dielectrics: spontaneous emission of submicronic dust particles". Condensed Matter Physics. 5 (3):
Chernobyl_disaster
Thought experiment of 1867
of absorption of a photon at a specific wavelength, followed by spontaneous emission to a different internal state. The irreversible process is coupled
Maxwell's_demon
Physicist
for Defense (CNID) Graduate Fellowship (2007) Revealed record-high spontaneous emission rates. Elucidated the mechanisms behind large Purcell factors and
Maiken_Mikkelsen
Laser in which electricity is discharged through gas
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Gas_laser
Reaction that splits an atomic nucleus
Brookhaven National Laboratory reports for the first the emission of multiple neutrons during spontaneous fission of uranium. Her research was kept a secret
Nuclear_fission
Material in core during nuclear meltdown
"Radiation damages and self-spluttering of high radioactive dielectrics: Spontaneous emission of submicrometre dust particles". Condensed Matter Physics. 5 (3(31)):
Corium_(nuclear_reactor)
Quantum electromechanical process
state to the ground state, spontaneous emission, can be examined. Spontaneous emission, in contrast to stimulated emission, is when an excited electron
Resonance_fluorescence
Excited dimeric molecule containing a noble gas
repulsive interactions in the ground state. Emission of excimer molecules is also used as a source of spontaneous ultraviolet light (excimer lamps). The molecule
Excimer
Spacecraft communication system using lasers
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Deep Space Optical Communications
Deep_Space_Optical_Communications
Kind of show made with laser light
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
Laser_lighting_display
Medical condition
stimulation. Nocturnal emissions may be considered a normal/physiological form of spontaneous orgasm. Pathological spontaneous orgasms can be experienced
Spontaneous_orgasm
Concept in philosophy and early physics
shift QCD vacuum QED vacuum Quantum fluctuation Quantum vacuum state Spontaneous emission Vacuum Vacuum permittivity Vacuum Rabi oscillation Spinoza's Ethics
Horror_vacui_(philosophy)
Electromagnetic wave that is not pulsed
organization for radio hams Tikker – Electronic component Types of radio emissions – Classification of radio frequency signals Waveform – Shape and form
Continuous_wave
Hypothetical device
original on 2016-03-11. Retrieved 2016-02-24. Hien, P. Z. (1970). "Spontaneous emission of gamma quanta by a system containing identical nuclei". Journal
Gamma-ray_laser
German physicist and engineer
2023. Englund, D., Fattal, D., Waks, E., et al. Controlling the spontaneous emission rate of single quantum dots in a two-dimensional photonic crystal
Dirk_Englund
Application of laser in medical field
surgery. The word laser stands for "light amplification by stimulated emission of radiation". The laser was invented in 1960 by Theodore Maiman, and its
Laser_medicine
Change of an electron between energy levels within an atom
transition, for molecules Phosphorescence Quantum jump Spontaneous emission Stimulated emission Schombert, James. "Quantum physics" University of Oregon
Atomic_electron_transition
Quantum channel
channel is a quantum channel that models physical processes such as spontaneous emission. A natural process by which this channel can occur is a spin chain
Amplitude_damping_channel
Quantum optical theoretical system
demonstrates superradiance, bright and dark states, Rabi oscillations and spontaneous emission, and other features of interest in quantum electrodynamics, quantum
Tavis–Cummings_model
Digital optical disc data storage format
Nd:YAG Raman Ruby Ti-sapphire X-ray Science Active medium Amplified spontaneous emission Continuous wave Laser ablation Laser linewidth Lasing threshold Population
DVD
SPONTANEOUS EMISSION
SPONTANEOUS EMISSION
Boy/Male
Hindu
Fast, Spontaneous
Boy/Male
Muslim
Spontaneous
Girl/Female
Arabic, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Muslim, Punjabi, Sikh, Sindhi, Tamil
Active; Spontaneous
Boy/Male
Indian
Spontaneous
Boy/Male
Hindu, Indian, Kashmiri, Punjabi, Sanskrit, Sikh, Traditional
Spontaneous; The Emperor; King of Kings
Boy/Male
Tamil
Rajinder | ராஜிஂதர
Spontaneous
Rajinder | ராஜிஂதர
Boy/Male
Tamil
Islunin | இஸà¯à®²à¯à®‚நீந
Fast, Spontaneous
Islunin | இஸà¯à®²à¯à®‚நீந
Boy/Male
Hindu
Spontaneous
Girl/Female
Indian
Spontaneous
SPONTANEOUS EMISSION
SPONTANEOUS EMISSION
Boy/Male
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Moon
Girl/Female
Gaelic
Angel.
Boy/Male
Muslim
Light of the religion (Islam)
Boy/Male
English
Joyful.
Boy/Male
Indian, Punjabi, Sikh
Protector of Cupid
Boy/Male
Australian, French, German, Polish
Hyacinth Flower
Female
Arthurian
, shallot (the onion); or, Alclut, the name of the rock of Dumbarton.
Boy/Male
Sikh
The exalted warrior
Boy/Male
Hindu, Indian, Marathi, Sanskrit
Brother of the Gods
Boy/Male
Gaelic
Rock. Also a, derived from the Celtic for 'man' and 'choice'.
SPONTANEOUS EMISSION
SPONTANEOUS EMISSION
SPONTANEOUS EMISSION
SPONTANEOUS EMISSION
SPONTANEOUS EMISSION
v. t.
Spontaneous; self-moved.
a.
Cultivated; not indigenous; not of spontaneous growth; as, artificial grasses.
n.
One who believes in the theory of spontaneous generation, or heterogenesis.
a.
Of or pertaining to free will; voluntary; spontaneous; as, a freewill offering.
n.
A believer in panspermy; one who rejects the theory of spontaneous generation; a biogenist.
n.
Reproduction by spontaneous fission.
adv.
In an autogenous manner; spontaneously.
n.
Spontaneous generation, so called.
n.
Spontaneous generation.
a.
Capable of subdividing spontaneously.
a.
Produced without being planted, or without human labor; as, a spontaneous growth of wood.
a.
Proceeding from, or acting by, internal impulse, energy, or natural law, without external force; as, spontaneous motion; spontaneous growth.
v. t.
To divide into two by natural growth or spontaneous action; as, infusoria duplicate themselves.
a.
Capable of being moved, aroused, or excited; capable of spontaneous movement.
a.
Spontaneous; voluntary.
a.
Proceding from natural feeling, temperament, or disposition, or from a native internal proneness, readiness, or tendency, without constraint; as, a spontaneous gift or proportion.
a.
Reproducing by spontaneous fission. See Fission.
n.
Spontaneous generation; abiogenesis.
a.
Produced or effected by force; not spontaneous; unnatural; abnormal.
a.
Produced by spontaneous generation.