Mode selection in electrically driven quantum dot microring cavities
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Within this paper a novel method for selecting certain lasing modes from a whispering gallery mode (WGM) spectrum of electrically pumped microrings is presented. Selection is achieved by introducing sub-wavelength sized notches of about 50nm width and 500nm depth to the sidewalls of ring shaped quantum dot micro cavities with 80 mu m diameter and ridge widths below 2 mu m. It is shown that the notches act as scattering centers, suppressing modes that have maxima in intensity at the notch position. By a variation of the angle between the notches, different repetitive patterns of lasing modes and suppressed modes are conceivable. (C) 2013 Optical Society of America
Schlehahn , A , Albert , F , Schneider , C , Höfling , S , Reitzenstein , S , Wiersig , J & Kamp , M 2013 , ' Mode selection in electrically driven quantum dot microring cavities ' Optics Express , vol 21 , no. 13 , pp. 15951-15958 . DOI: 10.1364/OE.21.015951
© 2013 OSA. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at: http://www.opticsinfobase.org/oe/fulltext.cfm?uri=oe-21-13-15951&id=258322. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
This work is supported by the European Commission within the scope of the project “TREASURE” (Grant No. 250056)
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