| 单词 |
superfluorescence |
| 释义 |
ˌsuperfluoˈrescence Physics.
[super- 6 c.]
The co-operative emission of radiation by a system of atoms as a result of fluorescence and the spontaneous correlation of excited atomic states; also, superradiance.
1966Jrnl. Appl. Physics XXXVII. 682 (heading) Studies of ruby superfluorescence and population inversion. 1974Sci. Amer. June 31/1 Since short-pulse laser systems must store large amounts of energy prior to pulse amplification, high gain coefficients in large-aperture amplifiers present two difficult problems. The first is termed superfluorescence. This is simply the normal fluorescence emitted spontaneously by the excited laser material, amplified by the gain of the material itself. 1975Bonifacio & Lugiato in Physical Rev. A. XI. 1507/2 The system spontaneously creates correlations, i.e., a macroscopic dipole which gives rise to a pulse whose maximum intensity is proportional to N2 and whose time duration is proportional to N-1. We call this phenomenon superfluorescence. 1980Nature 8 May 70/1 Superfluorescence produces radiation pulses which have much larger amplitudes than those which one would obtain in normal incoherent atomic radiation processes.
Hence ˌsuperfluoˈrescent a.
1973Appl. Physics Lett. XXII. 79/2 Figure 1 illustrates the repetitive superfluorescent pulses observed at 3370 Å in N2. 1977R. L. Byer in Harper & Wherrett Nonlinear Optics ii. 89 For efficient superfluorescent operation the input noise field must be amplified by approximately 1016. |
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