Microdisk resonators as high-sensitive devices for biodetection

The single mode lasing of microdisks (MDs) with attached antibodies in aqueous medium is demonstrated. MDs comprise quantum dot active region emitting in the vicinity of 1.3 μm. The presence of antibodies on a MD surface leads to a number of effects, including the increase of threshold power of laser generation, likewise, changes in the linewidth of the resonance peak.