Demonstration of an ultra-low-threshold phonon laser with couple...We demonstrate an ultra-low-threshold phonon laser using a coupled-microtoroid-cavity system by introducing a novel coupling approach. The ... for a radialbreathing mode of 59.2 MHz. The measured phonon lasing threshold is as low as 1.2 μW, which is ～5 times ...
On general threshold and general cascade models of social influe... ... problem. This paper contains two notes. The first one is a.simplified proof of Kempe–Kleinberg–Tadös conjecture on general threshold mode1.of social influence. The second one is on the verification of a condition in definition.of general cascade model.
Development of high damage threshold laser-machined apodizers an...We have developed high damage threshold filters to modify the spatial profile of a high energy laser beam. The ... in dielectric materials, we see an increased laser-induced damage threshold from previous filters created using ‘metal on glass’ lithography.
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