Distributed Bragg reflector assisted low-threshold ZnO nanowire random laser diode

Enhanced random lasing from distributed Bragg reflector assisted Au-ZnO nanowire Schottky diode

Effects of Bragg Mirror Interface Grading and Layer Thickness Variations on VCSEL Performance at 1.55μm

A selectively oxidized Vertical Cavity Surface Emitting Laser (VCSEL) has been designed and fabricated for operation at a wavelength of 1.546μm. The lattice matched device structure was grown on an InP substrate using III-V quaternary semiconductor alloys for Bragg mirrors and GaInAsP-based unstrained Multi-Quantum Wells (MQW) for the active layer. The mirror reflectivities are 97% for the top ...

Highly efficient multimode diode-pumped Yb:KYW laser

Record high differential efficiency (53.2%) and full optical efficiency (48%) for a multimode diode-pumped Yb:KYW laser have been achieved. The characteristics of the laser and methods for improving its efficiency using a distributed Bragg reflector tapered diode laser (DBR TDL) are discussed.

Use of distributed Bragg reflectors to enhance Fabry–Pérot lasing in vertically aligned ZnO nanowires

An optically pumped ZnO nanowire laser with a 10-period SiO2/SiNx distributed Bragg reflector (DBR) was demonstrated. Stimulated emissions with equally distributed Fabry–Pérot lasing modes were observed at pumping powers larger than 121 kW/cm2. This result, when compared to nanowires of the same length and without a DBR structure, shows that a lower threshold of pumping power, higher quality fa...

An Sb-doped p-type ZnO nanowire based random laser diode.

An electrically pumped Sb-doped ZnO nanowire/Ga-doped ZnO p-n homojunction random laser is demonstrated. Catalyst-free Sb-doped ZnO nanowires were grown on a Ga-doped ZnO thin film on a Si substrate by chemical vapor deposition. The morphology of the as-grown titled nanowires was observed by scanning electron microscopy. X-ray photoelectron spectroscopy results indicated the incorporation of Sb...