Polarization features of optically pumped CdS nanowire lasers
Roeder R, Ploss D, Kriesch A, Buschlinger R, Geburt S, Peschel U, Ronning C (2014)
Publication Type: Journal article
Publication year: 2014
Journal
Book Volume: 47
Article Number: 394012
Journal Issue: 39
DOI: 10.1088/0022-3727/47/39/394012
Abstract
High quality CdS nanowires suspended in air were optically pumped both below and above the lasing threshold. The polarization of the pump laser was varied while emission out of the end facet of the nanowire was monitored in a `head-on' measurement geometry. Highest pump-efficiency and most efficient absorption of the pump radiation are demonstrated for an incident electric field being polarized parallel to the nanowire axis. This polarization dependence, which was observed both above the lasing threshold and in the regime of amplified spontaneous emission, is caused by an enhanced absorption for parallel polarized optical pumping. Measured Stokes parameters of the nanowire emission reveal that due to the onset of lasing the degree of polarization rapidly increases from approximately 15 to 85%. Both Stokes parameters and degree of polarization of the nanowire lasing emission are independent of the excitation polarization. The transversal lasing mode is therefore not notably affected by the polarization of the pumping beam, although the supply with optical gain is significantly enhanced for an excitation polarization parallel to the nanowire axis.
Authors with CRIS profile
Daniel Ploss
Institut für Optik, Information und Photonik
Arian Kriesch
Professur für Experimentalphysik
Robert Buschlinger
Institut für Optik, Information und Photonik
Ulf Peschel
Professur für Experimentalphysik
Additional Organisation(s)
Involved external institutions
Germany (DE)How to cite
APA:
Roeder, R., Ploss, D., Kriesch, A., Buschlinger, R., Geburt, S., Peschel, U., & Ronning, C. (2014). Polarization features of optically pumped CdS nanowire lasers. Journal of Physics D-Applied Physics, 47(39). https://dx.doi.org/10.1088/0022-3727/47/39/394012
MLA:
Roeder, Robert, et al. "Polarization features of optically pumped CdS nanowire lasers." Journal of Physics D-Applied Physics 47.39 (2014).
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