Laser action in nanowires: Observation of the transition from amplified spontaneous emission to laser oscillation
By Mariano A. Zimmler, Jiming Bao, F. Capasso, S. Müller, C. Ronning. 2008
258 citations recorded by the source corpus.
Direct evidence of the transition from amplified spontaneous emission to laser action in optically pumped zinc oxide (ZnO) nanowires, at room temperature, is presented. The optical power evolves from a superlinear to a linear regime as the pump power exceeds threshold, concomitant with a transition to directional emission along the nanowire and the emergence of well defined cavity Fabry–Perot modes around a wavelength of ≈385 nm, the intensity of which exceeds the spontaneous emission background by orders of magnitude. The laser oscillation threshold is found to be strongly dependent on nanowire diameter, with no laser oscillation observed for diameters smaller than ∼150 nm. Finally, we use an alternative “head on” detection geometry to measure the output power of a single nanowire laser.
Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering
View Paper: https://www.semanticscholar.org/paper/252ea95b81188df183bd1f65b43492a640c784e5
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In Atomic and Molecular Physics, and Optics
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In Biomedical Engineering
Citations in the corpus
- Lasing in robust cesium lead halide perovskite nanowires (2016, background): “2F) follows the typical “S”-curve shape and depicts all three PL regimes: spontaneous emission dominates at low excitation intensities until the onset of lasing near 5 μJ cm (Pth), the superlinear PL increase indicative of amplified spontaneous emission follows, and finally gain-pinning and the emer”
- Plasmon lasers at deep subwavelength scale (2009, background): “Since these devices do not launch a localized guided mode, one would need to detect the light end-on to achieve significant efficiency, as outlined by Zimmler et al [8].”