Observation of bubble dynamics within luminescent cavitation clouds: Sonoluminescence at the nano-scale
Observation of bubble dynamics within luminescent cavitation clouds: Sonoluminescence at the nano-scale
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DOI：
10.1103/physreve.63.016310
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发表时间：
2001-01-01
影响因子：
2.4
通讯作者：
Putterman, SJ
中科院分区：
文献类型：
--
作者：
Weninger, KR;Camara, CG;Putterman, SJ
声驱动空化发光的测量表明，这种现象在从10 kHz到>10 MHz的巨大参数空间上是鲁棒的。实现的最小气泡半径是发光区域的尺寸的上限，并且范围从15 kHz下的约1 μ m到11 MHz下的数十nm。虽然线可以辨别一些空化云的光谱，他们坐在一个宽带连续的顶部，可以有更大的光谱密度在紫外线比观察到的共振驱动声致发光从一个单一的气泡。
Measurements of acoustically driven cavitation luminescence indicate that this phenomenon is robust over a huge parameter space ranging from 10 kHz to >10 MHz. The minimum bubble radius achieved is an upper bound for the size of the light-emitting region and ranges from about 1 mum at 15 kHz to tens of nm at 11 MHz. Although lines can be discerned in the spectra of some cavitation clouds, they sit on top of a broadband continuum which can have greater spectral density in the ultraviolet than is observed for resonantly driven sonoluminescence from a single bubble.