Green edge emitting lasers with porous GaN cladding
R. B. Anderson, Haojun Zhang, Emily Trageser, Nathan Palmquist, Matt Wong, Shuji Nakamura, Steven P. DenBaars
Abstract
GaN lasers with green emission wavelength at λ = 510 nm have been fabricated using novel nano-porous GaN cladding under pulsed electrical injection. The low slope efficiency of 0.13 W/A and high threshold current density of 14 kA/cm 2 are related to a combination of poor injection efficiency and high loss, analyzed by the independent characterization methods of variable stripe length and segmented contacts. Continuous wave operation showed narrowed spectra and augmented spontaneous emission.
Topics & Concepts
Cladding (metalworking)Materials scienceOptoelectronicsLaserAmplified spontaneous emissionOpticsWavelengthSlope efficiencySemiconductor laser theoryCurrent densityFiber laserSemiconductorComposite materialQuantum mechanicsPhysicsGaN-based semiconductor devices and materialsSemiconductor Quantum Structures and DevicesPlasma Diagnostics and Applications