Patent ID: 7860141

Claim:
A photonic crystal laser device, comprising: a photonic crystal laser element which includes: a) an active layer for generating light of a predetermined wavelength by an injection of electric charges; b) a two-dimensional photonic crystal provided on an upper side of the active layer and having a periodic structure corresponding to the predetermined wavelength; c) a plurality of upper electrodes arranged on an upper side of the two-dimensional photonic crystal; and d) one or more lower electrodes provided on a lower side of the active layer; a voltage application means for applying a voltage between the upper electrode and the lower electrode; and a control means for turning the voltage on or off successively in the array order of the plurality of the upper electrodes or the lower electrodes and applying the same voltage simultaneously to a group made of at least three adjacent upper electrodes or lower electrodes, wherein: the voltage application to each successive group of electrodes is substantially the same.