UV laser controlled quantum well intermixing in InAlGaAs/GaAs heterostructures

Quantum well intermixing in GaInNAs/GaAs structures

Multi-quantum-well nanowire heterostructures for wavelength-controlled lasers.

Rational design and synthesis of nanowires with increasingly complex structures can yield enhanced and/or novel electronic and photonic functions. For example, Ge/Si core/shell nanowires have exhibited substantially higher performance as field-effect transistors and low-temperature quantum devices compared with homogeneous materials, and nano-roughened Si nanowires were recently shown to have a...

Magnetoabsorption in InSb quantum-well heterostructures

Spin-resolved cyclotron resonance is observed in InSb/AlInSb quantum-well heterostructures. Spin-resolved transitions are identified for fields greater than 2.2 T and confirmed by k ·p modeling. The cyclotron effective mass is calculated for a range of fields up to 11.5 T and is indicative of the strong nonparabolicity in this material. Resonant coupling is observed between the ground and first...

Dual wavelength single waveguide laser diode fabricated using selective area quantum well intermixing

A two-section single stripe laser diode has been fabricated from a strained InGaAs/GaAs single quantum well heterostructure grown on GaAs substrate. The two sections have different band gap energies owing to selective area intermixing that is achieved by rapid thermal annealing of the sample with the two sections capped by silicon oxynitride (SiOxNy) and silicon dioxide (SiO2), respectively. Th...

Integrated hybrid silicon DFB laser-EAM array using quantum well intermixing.

We demonstrate multiple bandgap integration on the hybrid silicon platform using quantum well intermixing. A broadband DFB laser array and a DFB-EAM array are realized on a single chip using four bandgaps defined by ion implantation enhanced disordering. The broadband laser array uses two bandgaps with 17 nm blue shift to compensate for gain roll-off while the integrated DFB-EAMs use the as-gro...