title: Intra-cavity patterning for mode control in 1.3 μm coupled VCSEL arrays.
abstract: We report coupled VCSEL arrays, emitting at 1.3 μm wavelength, in which both the optical gain/loss and refractive index distributions were defined on different vertical layers. The arrays were electrically pumped through a patterned tunnel junction, whereas the array pixels were realized by intra-cavity patterning using sub-wavelength air gaps. Stable oscillations in coupled modes were evidenced for 2x2 array structures, from threshold current up to thermal roll-over, using spectrally resolved field pattern analysis.
authors: Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Physics of Nanostructures, CH 1015 Lausanne, Switzerland.
authors: Lukas
authors: L
authors: Mutter
authors: Benjamin
authors: B
authors: Dwir
authors: Andrei
authors: A
authors: Caliman
authors: Vladimir
authors: V
authors: Iakovlev
authors: Alexandru
authors: A
authors: Mereuta
authors: Alexei
authors: A
authors: Sirbu
authors: Eli
authors: E
authors: Kapon