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Proceedings Paper

Theory and characterization of elliptically polarized modes in vertical-cavity surface-emitting lasers
Author(s): Nicolas Volet
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Paper Abstract

The polarization of the beam emitted from telecom-wavelength vertical-cavity surface-emitting lasers (VCSELs) is studied in detail. Stokes parameters are extracted separately for the two polarization submodes of the fundamental spatial mode LP01. This characterization was performed at room temperature and for a significant number of devices. This led to the discovery of stable optical modes with a polarization that differs from the linear case. This crucial result was obtained without immersing the devices in an external magnetic field or driving them under external optical injection. In addition, the polarization can be tuned directly with the drive current. Moreover, the polarization handedness can be switched electrically. A theoretical investigation shows that some of the equations forming the basis of the spin-flip model should be reconsidered. In particular, a generalization of this theory is discussed and fantastic agreement is found with the experimental results. This work paves the way for a broad range of novel applications with the VCSEL technology, in particular for spintronics, bio-chemical sensing and telecommunication.

Paper Details

Date Published: 4 March 2015
PDF: 20 pages
Proc. SPIE 9381, Vertical-Cavity Surface-Emitting Lasers XIX, 93810U (4 March 2015); doi: 10.1117/12.2078641
Show Author Affiliations
Nicolas Volet, Univ. of California, Santa Barbara (United States)


Published in SPIE Proceedings Vol. 9381:
Vertical-Cavity Surface-Emitting Lasers XIX
Chun Lei; Kent D. Choquette, Editor(s)

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