The emission from nanowires can couple to waveguide modes supported by the nanowire geometry, thus governing the far-field angular pattern. To investigate the geometry-induced coupling of the emission to waveguide modes, we acquire Fourier microscopy images of the photoluminescence of nanowires with diameters ranging from 143 to 208 nm. From the investigated diameter range, we conclude that a few nanometers difference in diameter can abruptly change the coupling of the emission to a specific mode. Moreover, we observe a diameter-dependent width of the Gaussian-shaped angular pattern in the far-field emission. This dependence is understood in terms of interference of the guided modes, which emit at the end facets of the nanowire. Our results are important for the design of quantum emitters, solid state lighting, and photovoltaic devices based on nanowires.
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21 March 2016
Research Article|
March 24 2016
Strong diameter-dependence of nanowire emission coupled to waveguide modes
Dick van Dam;
Dick van Dam
a)
1Department of Applied Physics,
Eindhoven University of Technology
, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Diego R. Abujetas
;
Diego R. Abujetas
2
Instituto de Estructura de la Materia (IEM-CSIC)
, Consejo Superior de Investigaciones Científicas Serrano, 121, 28006 Madrid, Spain
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José A. Sánchez-Gil
;
José A. Sánchez-Gil
2
Instituto de Estructura de la Materia (IEM-CSIC)
, Consejo Superior de Investigaciones Científicas Serrano, 121, 28006 Madrid, Spain
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Jos E. M. Haverkort;
Jos E. M. Haverkort
1Department of Applied Physics,
Eindhoven University of Technology
, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Erik P. A. M. Bakkers;
Erik P. A. M. Bakkers
1Department of Applied Physics,
Eindhoven University of Technology
, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
3Kavli Institute of Nanoscience,
Delft University of Technology
, Lorentzweg 1, 2628 CJ Delft, The Netherlands
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Jaime Gómez Rivas
Jaime Gómez Rivas
b)
1Department of Applied Physics,
Eindhoven University of Technology
, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
4
Dutch Institute for Fundamental Energy Research DIFFER
, P.O. Box 6336, 5600 HH Eindhoven, The Netherlands
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a)
Electronic mail: [email protected]
b)
Electronic mail: [email protected]
Appl. Phys. Lett. 108, 121109 (2016)
Article history
Received:
January 12 2016
Accepted:
March 15 2016
Citation
Dick van Dam, Diego R. Abujetas, José A. Sánchez-Gil, Jos E. M. Haverkort, Erik P. A. M. Bakkers, Jaime Gómez Rivas; Strong diameter-dependence of nanowire emission coupled to waveguide modes. Appl. Phys. Lett. 21 March 2016; 108 (12): 121109. https://doi.org/10.1063/1.4944848
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