Transient chirp in high speed photonic crystal quantum dots lasers with controlled spontaneous emission

Remy Braive (1) , Sylvain Barbay (1) , Isabelle Sagnes (1) , Audrey Miard (1) , Isabelle Robert-Philip (1) , Alexios Beveratos (1)

1 LPN - Laboratoire de photonique et de nanostructures

We report on a series of experiments on the dynamics of spontaneous emission controlled nanolasers. The laser cavity is a photonic crystal slab cavity, embedding self-assembled quantum dots as gain material. The implementation of cavity electrodynamics effects increases significantly the large signal modulation bandwidth, with measured modulation speeds of the order of 10 GHz while keeping an extinction ratio of 19 dB. A linear transient wavelength shift is reported, corresponding to a chirp of less than 100 pm for a 35-ps laser pulse. We observe that the chirp characteristics are independent of the repetition rate of the laser up to 10 GHz.

Mots clés: photonic crystal; nanolaser; chirp; high speed

Domaines: Physique Quantique [quant-ph]; Optique [physics.optics]

Remy Braive, Sylvain Barbay, Isabelle Sagnes, Audrey Miard, Isabelle Robert-Philip, et al.. Transient chirp in high speed photonic crystal quantum dots lasers with controlled spontaneous emission. Optics Letters, 2009, pp.554. ⟨10.1364/OL.34.000554⟩. ⟨hal-00345433⟩