Abstract
Polycrystalline CdSSe nanowires were prepared with a low-temperature physicalevaporation method. Structural analysis combining HRTEM with XRD demonstrate thatthese as-prepared wires have a hexagonal wurtzite structure with a polycrystalline nature.Locally excited optical measurements show that though these wires can still act aswaveguide cavities, their polycrystalline nature will induce a significant redshift of theemitted light during its transportation along them. Power dependent photoluminescencemeasurement shows that these polycrystalline wires can achieve broadband coherentemission at the band-edge band under high excitation, which shows marked contrast withthe much narrower and multimode spectra observed in the single-crystalline nanowires withthe same elemental composition. Time-resolved photoluminescence further confirms theoccurrence of coherent emission in these wires, which originates from the electron–holeplasma (EHP) recombination of high-density carriers generated under high excitation.These kinds of polycrystalline alloy nanowires with broadband coherent emission shouldhave potential uses in nano-scaled wavelength tunable light-emitting devices.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
