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What microcavities can do in photonics : coupling resonances and optical gain
KTH, School of Computer Science and Communication (CSC), Computational Biology, CB. KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP. (Computational Biological Physics, CBP)
2009 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

The present master's thesis deals with numerical modeling of solid-state micrometrical-sized polymeric dye lasers, commonly denoted as microcavities. It is part of a large research initiative carried out in the optics group, at the MAP (Microelectronics and Applied Physics) department in KTH (Kungliga Tekniska Högskolan - Royal Technical School) and targeted towards the design and manufacturing of micro- and nano-scaled polymeric components for nano-photonics, primarily lasers. The finite element method (FEM) in frequency domain is used as a primary modeling tool through the simulation software COMSOL Multiphysics. Models for spontaneous emission, optical losses and gain are developed and demonstrated. A specic layout is studied: the double hexagonal microcavity. While it was expected to be a good candidate for a laser, the design shows unexpected properties making it useful for sensing applications. Finally, the transposition of models to time domain is initiated : a replacement solution for the lacking perfectly matched layer (PML) in Comsol is developed and demonstrated. Methods for modeling materials parameters in time domain are investigated, together with the possible use of a more suitable algorithm : finite dierences in time domain (FDTD) or Yee's scheme.

Place, publisher, year, edition, pages
2009. , 88 p.
Keyword [en]
optical microcavities, laser, finite elements method
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-46569OAI: diva2:453898
Subject / course
Educational program
Master of Science in Engineering - Microelectronics
2009-06-08, Conference Room, elevator B, floor 4, Electrum 229, Isafjordsgatan 22, Kista, 15:00 (English)
Physics, Chemistry, Mathematics
Available from: 2011-11-08 Created: 2011-11-03 Last updated: 2014-10-10Bibliographically approved

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