[ Back to EurekAlert! ]

Contact: Julie Flory
Washington University in St. Louis

Whispering-Gallery Raman Microlasers

Caption: The image shows arrays of self-referenced and self-heterodyned Whispering-Gallery Raman microlasers for single nanoparticle detection. A "pump" laser generates a single Raman lasing mode inside the silica resonators. Upon landing of a nanoparticle on the resonator, Raman laser circulating inside the resonator undergo mode splitting leading to two new lasing modes in different colors. Monitoring the changes in the color difference (frequency difference) enables detecting and measuring of nanoparticles with single particle resolution.

Credit: J. Zhu, B. Peng, S.K. Ozdemir, L. Yang

Usage Restrictions: None

Related news release: Engineers develop new sensor to detect tiny individual nanoparticles

[ Back to EurekAlert! ]