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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Nanooptik

Humboldt-Universität zu Berlin | Mathematisch-Naturwissen­schaft­liche Fakultät | Institut für Physik | Nanooptik | Publications | Influence of a controllable scatterer on the lasing properties of an ultralow threshold Raman microlaser

Andrea Mazzei, Hanna Krauter, Oliver Benson, and Stephan Götzinger (2006)

Influence of a controllable scatterer on the lasing properties of an ultralow threshold Raman microlaser

Applied Physics Letters, 89(10):101105.

The authors investigate Raman lasing in a spherical high-Q glass microresonator with the help of a near-field optical scanning probe. Scattered photons are utilized to perform mode mapping of both pump and lasing modes. Single mode lasing with a record low threshold of 4.3  µW is observed. They investigate the position dependent quenching of the laser emission by the additional loss introduced by the subwavelength scanning probe and derive an estimation of the mechanical force gradient acting on the probe. They generalize a theoretical model of Raman lasing in microresonators to describe these effects.