Demonstration of coherent emission from high-$\beta$ photonic crystal nanolasers at room temperature

Richard Hostein (1) , Remy Braive (1) , Luc Le Gratiet (1) , Anne Talneau (1) , Gregoire Beaudoin (1) , Isabelle Robert-Philip (1) , Isabelle Sagnes (1) , Alexios Beveratos (1)

1 LPN - Laboratoire de photonique et de nanostructures

We report on lasing at room temperature and at telecommunications wavelength from photonic crystal nanocavities based on InAsP/InP quantum dots. Such laser cavities with a small modal volume and high quality factor display a high spontaneous emission coupling factor beta. Lasing is confirmed by measuring the second order autocorrelation function. A smooth transition from chaotic to coherent emission is observed, and coherent emission is obtained at 8 times the threshold power.

Domaines: Optique [physics.optics]

Richard Hostein, Remy Braive, Luc Le Gratiet, Anne Talneau, Gregoire Beaudoin, et al.. Demonstration of coherent emission from high-$\beta$ photonic crystal nanolasers at room temperature. 2010. ⟨hal-00463336⟩