Abstract
This work presents a theory of the frequency-resolved light emission of active two-dimensional dielectric microresonators, which are characterized by a highly nonparaxial mode structure and frequently feature a position-dependent dielectric constant and nonuniform gain. The Lorentzian intensity profile is characterized by an appropriately generalized Petermann factor, a renormalized peak position, and the cold-cavity resonance lifetime . The theory also delivers a relation of to the laser threshold that improves earlier phenomenological expressions even for the case of a homogeneous medium.
- Received 22 September 2008
DOI:https://doi.org/10.1103/PhysRevA.79.061801
©2009 American Physical Society