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Q: Fachverband Quantenoptik und Photonik
Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects
Q 30.43: Poster
Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais
Spatially resolved Stokes parameters of small-area Vertical-Cavity Surface-Emitting Lasers — •Andreas Molitor1, Pierluigi Debernardi2, Sebastien Hartmann1, and Wolfgang Elsäßer1,3 — 1Institut für Angewandte Physik, Technische Universität Darmstadt, Darmstadt, Germany — 2Istituto di Elettronica e di Ingegneria dell Informazione e delle Telecomunicazioni, Torino, Italy — 3Center of Smart Interfaces, Technische Universität Darmstadt, Darmstadt, Germany
The polarization state of light is a fascinating phenomenon because of its versatility in many optical applications like ellipsometry, microscopy and 3D imaging. Beside these optical applications of polarized light, the polarization behavior of light directly emitted by optoelectronic devices has been investigated very recently. We have shown in [1], that the Stokes formalism is mandatory to uncover the full information of the state of polarization of the VCSEL's emitted light. Using now an extended experimental technique, we demonstrate here for the first time spatially resolved Stokes parameters of the fundamental transverse mode of a small-area surface-grating VCSEL, showing in spite of the surface-grating both a spatially non-uniform linear polarization distribution of the fundamental transverse as well as a non-zero amount of the circular polarization component showing an non-uniform interesting pattern as well. These findings are compared and explained by simulations using the 3D VCSEL ELectroMagnetic (VELM) code.
[1] A. Molitor, S. Hartmann, and W. Elsässer, Opt. Lett. 37, 4799 (2012).