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Author Feng, Jijun ♦ Akimoto, Ryoichi
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ABSORPTION ♦ CLADDING ♦ CURRENT DENSITY ♦ DIELECTRIC MATERIALS ♦ ELECTRIC POTENTIAL ♦ ETCHING ♦ LASER CAVITIES ♦ LEAKAGE CURRENT ♦ MECHANICAL POLISHING ♦ QUANTUM EFFICIENCY ♦ QUANTUM WELLS ♦ REFLECTIVITY ♦ SILICON OXIDES ♦ SUPERLATTICES ♦ TEMPERATURE RANGE 0273-0400 K ♦ THRESHOLD CURRENT ♦ WAVEGUIDES ♦ WAVELENGTHS ♦ ZINC SELENIDES
Abstract Low threshold current ridge-waveguide BeZnCdSe quantum-well laser diodes (LDs) have been developed by completely etching away the top p-type BeMgZnSe/ZnSe:N short-period superlattice cladding layer, which can suppress the leakage current that flows laterally outside of the electrode. The waveguide LDs are covered with a thick SiO{sub 2} layer and planarized with chemical-mechanical polishing and a reactive ion etching process. Room-temperature lasing under continuous-wave condition is achieved with the laser cavity formed by the cleaved waveguide facets coated with high-reflectivity dielectric films. For a 4 μm-wide green LD lasing around a wavelength of 535 nm, threshold current and voltage of 7.07 mA and 7.89 V are achieved for a cavity length of 300 μm, and the internal differential quantum efficiency, internal absorption loss, gain constant, and nominal transparency current density are estimated to be 27%, 4.09 cm{sup −1}, 29.92 (cm × μm)/kA and 6.35 kA/(cm{sup 2 }× μm), respectively. This compact device can realize a significantly improved performance with much lower threshold power consumption, which would benefit the potential application for ZnSe-based green LDs as light sources in full-color display and projector devices installed in consumer products such as pocket projectors.
ISSN 00036951
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-10-19
Publisher Place United States
Journal Applied Physics Letters
Volume Number 107
Issue Number 16


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