Dirnberger, Florian and Abujetas, Diego and Koenig, Jan and Forsch, Moritz and Koller, Thomas and Gronwald, Imke and Lange, Christoph and Huber, Rupert and Schueller, Christian and Korn, Tobias and Sanchez-Gil, Jose and Bougeard, Dominique (2019) Tuning Spontaneous Emission through Waveguide Cavity Effects in Semiconductor Nanowires. NANO LETTERS, 19 (10). pp. 7287-7292. ISSN 1530-6984, 1530-6992
Full text not available from this repository. (Request a copy)Abstract
The ability to tailor waveguide cavities and couple them with quantum emitters has developed a realm of nanophotonics encompassing, for example, highly efficient single photon generation or the control of giant photon nonlinearities. Opening new grounds by pushing the interaction of the waveguide cavity and integrated emitters further into the deep subwavelength regime, however, has been complicated by nonradiative losses due to the increasing importance of surface defects when decreasing cavity dimensions. Here, we show efficient suppression of nonradiative recombination for thin waveguide cavities using core-shell semiconductor nanowires. We experimentally reveal the advantages of such nanowires, which host mobile emitters, that is, free excitons, in a one-dimensional (1D) waveguide, highlighting the resulting potential for tunable, active, nanophotonic devices. In our experiment, controlling the nanowire waveguide diameter tunes the luminescence lifetime of excitons in the nanowires across 2 orders of magnitude up to 80 ns. At the smallest wire diameters, we show that this luminescence lifetime can be manipulated by engineering the dielectric environment of the nanowires. Exploiting this unique handle on the spontaneous emission of mobile emitters, we demonstrate an all-dielectric spatial control of the mobile emitters along the axis of the 1D nanowire waveguide.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SINGLE-NANOWIRE; GAAS NANOWIRES; CARRIER LIFETIME; N-TYPE; ENHANCEMENT; SURFACE; MODES; INP; Semiconductor nanowire; luminescence lifetime; tunable spontaneous emission; photonic waveguide cavity; free excitons; subwavelength nanophotonics |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Dominique Bougeard |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Mar 2020 07:34 |
| Last Modified: | 26 Mar 2020 07:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26117 |
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