Intracavity Spectroscopy and Sensorics with Plasmonic Nanolaser

In laser physics, intracavity laser spectroscopy methods are known to have an extremely high sensitivity [1]. In these methods, an analyte being detected that absorbs at the lasing wavelength is placed in the laser cavity. The analyte is then detected by changing the lasing parameters, such as the threshold, intensity, and wavelength, resulting in the appearance of dips in the lasing spectrum.