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GaSb superluminescent diodes with broadband emission at 2.55 μ m
We report the development of superluminescent diodes (SLDs) emitting mW-level output power in a broad spectrum centered at a wavelength of 2.55 μm. The emitting structure consists of two compressively strained GaInAsSb/G ...
Design, synthesis, and structure-property relationships of Er3+ -doped TiO2 luminescent particles synthesized by sol-gel
Titania particles doped with various concentrations of Erbium were synthesized by the sol-gel method followed by different heat treatments. The shape and the grain growth of the particles were noticeably affected by the ...
Fabrication of ultrathin multilayered superomniphobic nanocoatings by liquid flame spray, atomic layer deposition, and silanization
Superomniphobic, i.e. liquid-repellent, surfaces have been an interesting area of research during recent years due to their various potential applications. However, producing such surfaces, especially on hard and resilient ...
Design considerations on GaInNAs solar cells with back surface reflectors
We report on design considerations for developing dilute nitride solar cells with back surface reflectors. Two different scenarios including specular and diffuse reflectors were modeled and their effects on solar cell ...
Temperature dependent characteristics of GaInP/GaAs/GaInNAsSb solar cell under simulated AM0 spectra
We report on the temperature characteristics of GaInP/GaAs/GaInNAsSb triple junction solar cell monolithically grown by molecular beam epitaxy. In particular, we have compared the temperature dependent light-biased ...
High power picosecond MOPA with anisotropic ytterbium-doped tapered double-clad fiber
(SPIE-INT SOC OPTICAL ENGINEERING, 2018)
Generation of ultrashort pulses with high average power and moderately high pulse energy generally requires a mode-locked laser followed by several fiber amplifiers in a master-oscillator power-amplifier configuration. ...
Metal/Polymer Back Reflectors with Diffraction Gratings for Light Trapping in III-V Solar Cells
We report on the fabrication, characterization and simulation of diffraction gratings for back contact reflectors in III-V solar cells. The gratings are designed for thin-film solar cells incorporating absorbers with bandgap ...
Comparison of ‘shallow’ and ‘deep’ junction architectures for MBE-grown InAs/GaAs quantum dot solar cells
We report on the fabrication of InAs/GaAs quantum dot solar cells with high open circuit voltage by molecular beam epitaxy. ‘Shallow’ and ‘deep’ junction architectures were compared. The highest open circuit voltage of ...
Ultra-large mode area single frequency anisotropic MOPA with double clad Yb-doped tapered fiber
(SPIE, IEEE, 2018-01-01)
We demonstrates all-fiber master oscillator - power amplifier delivered 70W output power at 1033.33nm with 8 kHz FWHM linewidth without any problems with SBS. The anisotropic ytterbium doped tapered double clad amplifier ...
Resonant harmonic generation in AlGaAs nanoantennas using cylindrical vector beams
(The Optical Society; OSA, 2018)
We use second- and third-harmonic generation with cylindrical vector beams to investigate AlGaAs nanodisks. The nonlinear emission is found to depend strongly on the interplay between tensorial nonlinearities, focal-field ...