Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Université Paris Diderot-paris 7

Giuseppe Leo

Alessio Andronico

Jean-Michel Gerard

Julien Claudon

Jean-Michel Gérard

Sara Ducci

Mathieu Munsch

Vincent Berger

A tuneable laser source includes a first confinement layer forming a Bragg reflector for a pump wave; an active layer made of non-linear semiconducting material, the refraction index of the active layer being greater than the refraction index of the first confinement layer; a second confinement layer, the refraction index of the second confinement layer being less than the refraction index of the active layer; a base with a first width; and a ribbon with a second width less than the first width. The second width is less than 10 &#x3bc;m; the active layer includes at least one plane of quantum boxes capable of emitting a pump wave and the ribbon includes at least the part of the active layer including the quantum boxes plane and the second confinement layer.

On-chip electrically pumped optical parametric source

A laser device for emitting THz waves includes a heterostructure with a substantially cylindrical shape including a first layer in an optically nonlinear semiconductor material including emitters to emit in two whispering gallery modes that are confined in the first layer and enabling the generation within the first layer of radiation in an electromagnetic THz whispering gallery mode, a second and a third layer in a semiconductor material each presenting an optical index that is smaller than the index of the material used for the first layer and a metal layer situated at one end of the heterostructure. The heterostructure includes in its center a hole with a substantially cylindrical shape extending over the entire height of the heterostructure.

Terahertz wave emission laser device with a perforated structure

A laser device having a wave emission within a frequency range of 0.5 to 5 THz, includes a semiconductor heterostructure having a cylindrical form with a circular cross-section and including: a first optically nonlinear semiconductor material layer including an emitting medium configured to emit at least two optical whispering gallery modes belonging to the near-infrared spectrum, the two whispering gallery modes being confined within the first layer and enabling the generation, within the first layer, of radiation within an electromagnetic whispering gallery mode having a frequency of 0.5 to 5 THz, the radiation being obtained through the difference in frequency of the two whispering gallery modes, the cylindrical geometry of the heterostructure ensuring phase tuning between the two optical whispering gallery modes belonging to the near-infrared spectrum and the terahertz mode at the difference in frequency; a second and a third semiconductor material layer, each having an optical index weaker than the index of the material of the first layer and located on both sides of the first layer; at least one metal layer located on one end of the hetero structure.

Terahertz wave emission laser device

Growing community of inventors

Fontenay Sous Bois, France

Giuseppe Leo