| 释义 |
superˈradiant, a. Physics.
[super- 9 a.]
Involving or exhibiting superradiance.
1954R. H. Dicke in Physical Rev. XCIII. 102/2 For want of a better term, a gas which is radiating strongly because of coherence will be called ‘super-radiant’. 1974Sci. Amer. June 126/1 The optical gain of the rapid discharge is so large that emission becomes superradiant, which means that the unit will lase without an optical cavity. 1978Nature 20 Apr. 742/2 The word superradiant has often been misused..but is now taken to mean either the coherent radiation generated by a system of atoms possessing an externally created macroscopic polarisation rather akin to a phased array of dipoles, or alternatively the incoherent fluctuating radiation produced by a system of excited atoms possessing no initial polarisation but instead developing a cooperative decay behaviour through quantum correlations.
Hence superˈradiantly adv.; also superˈradiance, the spontaneous emission of coherent radiation by a system of atoms, esp. when the coherence is due to the initial correlation of the atoms by an external macroscopic polarization.
1965Physical Rev. Lett. XIV. 589 (heading) Nuclear superradiance in solids. 1974Sci. Amer. June 126/2 If the ultraviolet pulses are focused by a cylindrical lens to a line on the surface of the dye.., the dye will often lase superradiantly in visible light along the direction of the line. 1979New Scientist 8 Mar. 763/2 The wave analogue of this process was called ‘super-radiance’: incident waves in certain modes would be amplified (rather than absorbed) by a rotating black hole, and would carry away some of the black hole's rotational energy. |