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Thermally induced wavelength tunability of microcavity solid-state dye lasers
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
2007 (English)In: Optics Express, ISSN 1094-4087, Vol. 15, no 20, 12971-12978 p.Article in journal (Refereed) Published
Abstract [en]

Wavelength tunability of a microcavity solid-state dye laser is modeled and demonstrated by simulations making use of the finite element method. We investigate the application of two phenomena, thermoelastic expansion of the microcavity material and thermo-induced change of the refractive index, to tune the microcavity mode frequencies by a variation of the effective optical path. An optimized size of the laser microcavity is defined depending on the operation wavelength bandwidth and the glass transition temperature of the gain material.

Place, publisher, year, edition, pages
2007. Vol. 15, no 20, 12971-12978 p.
Keyword [en]
Bandwidth, Microcavities, Solid state lasers, Thermal effects, Thermoelasticity, Wavelength
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-8046DOI: 10.1364/OE.15.012971ISI: 000250006700043Scopus ID: 2-s2.0-35148845946OAI: oai:DiVA.org:kth-8046DiVA: diva2:13263
Note
QC 20101004Available from: 2008-02-29 Created: 2008-02-29 Last updated: 2010-11-19Bibliographically approved
In thesis
1. Polymeric Microcavities for Dye Lasers and Wavefront Shapers
Open this publication in new window or tab >>Polymeric Microcavities for Dye Lasers and Wavefront Shapers
2008 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

Over the last few years, the available computing power allows us to have a deeper insight into photonics components than we ever had before. In this thesis we use the finite element method (FEM) to explore the behavior of the waves in 2D planar microcavities. We demonstrate the tunability of the cavity over a wide range of frequencies taking into account both the thermo-mechanical and the thermo-optical effect. Geometry and material choices are done so that the latter is predominant. We also demonstrate an odd mode disappearing phenomenon reported here for the first time as far as we know. Using this knowledge, we design two structures with these remarkable properties.

One of the devices will be used as micro-sized solid-state dye laser with Rhodamine 6G as the active medium and SU-8 polymer as a cavity material in sizes that have never been reached before. This opens new opportunities not only for future implementation for “labs-on-a-chip” (LOC) but also for a higher integration density of optical communication systems. The second device is a wavefront shaper creating plane waves from a point source performing the functions of beam shaper and beam splitter with plane wave as the output result.

After an introduction to FEM and comparison with a rival algorithm, some issues related to FEM in electromagnetic simulation are resolved and explained. Finally, some fabrication techniques with feature sizes <100 nm, such as electron beam lithography (EBL) and nano-imprint lithography (NIL), are described and compared with other lithographic techniques.

Place, publisher, year, edition, pages
Stockholm: KTH, 2008. 52 p.
Series
Trita-ICT/MAP AVH, ISSN 1653-7610 ; 2008:3
National Category
Atom and Molecular Physics and Optics
Identifiers
urn:nbn:se:kth:diva-4655 (URN)978-91-7178-889-4 (ISBN)
Presentation
2008-03-19, Sal N2, KTH-Electrum 3, Isafjordsgatan 28, b v, Kista, 10:15
Opponent
Supervisors
Note
QC 20101119Available from: 2008-02-29 Created: 2008-02-29 Last updated: 2010-11-19Bibliographically approved

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