Lasing in dye-doped high-Q conical polymeric microcavities

Tobias Grossmann; Simone Schleede; Mario Hauser; Mads Brøkner Christiansen; Christoph Vannahme; Carsten Eschenbaum; Sönke Klinkhammer; Torsten Beck; Jochen Fuchs; G. Ulrich Nienhaus; Uli Lemmer; Anders Kristensen; Timo Mappes; Heinz Kalt

doi:10.1117/12.874808

Lasing in dye-doped high-Q conical polymeric microcavities

Tobias Grossmann, Simone Schleede, Mario Hauser, Mads Brøkner Christiansen, Christoph Vannahme, Carsten Eschenbaum, Sönke Klinkhammer, Torsten Beck, Jochen Fuchs, G. Ulrich Nienhaus, Uli Lemmer, Anders Kristensen, Timo Mappes, Heinz Kalt

Karlsruhe Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

Abstract

We report on lasing in conical microcavities, which are made out of the low-loss polymer poly (methyl methacrylate) (PMMA) doped with the dye rhodamine 6G, and directly fabricated on silicon. Including a thermal reflow step during fabrication enables a significantly reduced surface roughness, resulting in low scattering losses of the whispering gallery modes (WGMs). The high cavity quality factors (above 2·106 in passive cavities) in combination with the large oscillator strength gain material enable lasing threshold energies as low as 3 nJ, achieved by free-space excitation in the quasistationary pumping regime. Lasing wavelengths are detected in the visible wavelength region around 600 nm. Finite element simulations indicate that lasing occurs in fundamental TE/TM cavity modes, as these modes have - in comparison to higher order cavity modes - the smallest mode volume and the largest overlap with the gain material. In addition, we investigate the effect of dye concentration on lasing wavelength and threshold by comparing samples with four different concentrations of rhodamine 6G. Observations are explained by modifying the standard dye laser model.

Original language	English
Title of host publication	Proceedings of SPIE
Volume	7913
Publisher	SPIE - International Society for Optical Engineering
Publication date	2011
DOIs	https://doi.org/10.1117/12.874808
Publication status	Published - 2011
Event	Laser Resonators and Beam Control - San Francisco, California, USA Duration: 1 Jan 2011 → … Conference number: 8

Conference

Conference	Laser Resonators and Beam Control
Number	8
City	San Francisco, California, USA
Period	01/01/2011 → …

Series	Proceedings of SPIE - The International Society for Optical Engineering
ISSN	0277-786X

Keywords

Finite element analysis
Whispering gallery mode
Laser
Polymer microcavity
High-Q, dye

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10.1117/12.874808

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Grossmann, T., Schleede, S., Hauser, M., Christiansen, M. B., Vannahme, C., Eschenbaum, C., Klinkhammer, S., Beck, T., Fuchs, J., Nienhaus, G. U., Lemmer, U., Kristensen, A., Mappes, T., & Kalt, H. (2011). Lasing in dye-doped high-Q conical polymeric microcavities. In Proceedings of SPIE (Vol. 7913). SPIE - International Society for Optical Engineering. https://doi.org/10.1117/12.874808

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title = "Lasing in dye-doped high-Q conical polymeric microcavities",

abstract = "We report on lasing in conical microcavities, which are made out of the low-loss polymer poly (methyl methacrylate) (PMMA) doped with the dye rhodamine 6G, and directly fabricated on silicon. Including a thermal reflow step during fabrication enables a significantly reduced surface roughness, resulting in low scattering losses of the whispering gallery modes (WGMs). The high cavity quality factors (above 2·106 in passive cavities) in combination with the large oscillator strength gain material enable lasing threshold energies as low as 3 nJ, achieved by free-space excitation in the quasistationary pumping regime. Lasing wavelengths are detected in the visible wavelength region around 600 nm. Finite element simulations indicate that lasing occurs in fundamental TE/TM cavity modes, as these modes have - in comparison to higher order cavity modes - the smallest mode volume and the largest overlap with the gain material. In addition, we investigate the effect of dye concentration on lasing wavelength and threshold by comparing samples with four different concentrations of rhodamine 6G. Observations are explained by modifying the standard dye laser model.",

keywords = "Finite element analysis, Whispering gallery mode, Laser, Polymer microcavity, High-Q, dye",

author = "Tobias Grossmann and Simone Schleede and Mario Hauser and Christiansen, {Mads Br{\o}kner} and Christoph Vannahme and Carsten Eschenbaum and S{\"o}nke Klinkhammer and Torsten Beck and Jochen Fuchs and Nienhaus, {G. Ulrich} and Uli Lemmer and Anders Kristensen and Timo Mappes and Heinz Kalt",

year = "2011",

doi = "10.1117/12.874808",

language = "English",

volume = "7913",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE - International Society for Optical Engineering",

booktitle = "Proceedings of SPIE",

note = "Laser Resonators and Beam Control ; Conference date: 01-01-2011",

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Grossmann, T, Schleede, S, Hauser, M, Christiansen, MB, Vannahme, C, Eschenbaum, C, Klinkhammer, S, Beck, T, Fuchs, J, Nienhaus, GU, Lemmer, U, Kristensen, A, Mappes, T & Kalt, H 2011, Lasing in dye-doped high-Q conical polymeric microcavities. in Proceedings of SPIE. vol. 7913, SPIE - International Society for Optical Engineering, Proceedings of SPIE - The International Society for Optical Engineering, Laser Resonators and Beam Control, San Francisco, California, USA, 01/01/2011. https://doi.org/10.1117/12.874808

Lasing in dye-doped high-Q conical polymeric microcavities. / Grossmann, Tobias; Schleede, Simone; Hauser, Mario et al.
Proceedings of SPIE. Vol. 7913 SPIE - International Society for Optical Engineering, 2011. (Proceedings of SPIE - The International Society for Optical Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

TY - GEN

T1 - Lasing in dye-doped high-Q conical polymeric microcavities

AU - Grossmann, Tobias

AU - Schleede, Simone

AU - Hauser, Mario

AU - Christiansen, Mads Brøkner

AU - Vannahme, Christoph

AU - Eschenbaum, Carsten

AU - Klinkhammer, Sönke

AU - Beck, Torsten

AU - Fuchs, Jochen

AU - Nienhaus, G. Ulrich

AU - Lemmer, Uli

AU - Kristensen, Anders

AU - Mappes, Timo

AU - Kalt, Heinz

N1 - Conference code: 8

PY - 2011

Y1 - 2011

N2 - We report on lasing in conical microcavities, which are made out of the low-loss polymer poly (methyl methacrylate) (PMMA) doped with the dye rhodamine 6G, and directly fabricated on silicon. Including a thermal reflow step during fabrication enables a significantly reduced surface roughness, resulting in low scattering losses of the whispering gallery modes (WGMs). The high cavity quality factors (above 2·106 in passive cavities) in combination with the large oscillator strength gain material enable lasing threshold energies as low as 3 nJ, achieved by free-space excitation in the quasistationary pumping regime. Lasing wavelengths are detected in the visible wavelength region around 600 nm. Finite element simulations indicate that lasing occurs in fundamental TE/TM cavity modes, as these modes have - in comparison to higher order cavity modes - the smallest mode volume and the largest overlap with the gain material. In addition, we investigate the effect of dye concentration on lasing wavelength and threshold by comparing samples with four different concentrations of rhodamine 6G. Observations are explained by modifying the standard dye laser model.

AB - We report on lasing in conical microcavities, which are made out of the low-loss polymer poly (methyl methacrylate) (PMMA) doped with the dye rhodamine 6G, and directly fabricated on silicon. Including a thermal reflow step during fabrication enables a significantly reduced surface roughness, resulting in low scattering losses of the whispering gallery modes (WGMs). The high cavity quality factors (above 2·106 in passive cavities) in combination with the large oscillator strength gain material enable lasing threshold energies as low as 3 nJ, achieved by free-space excitation in the quasistationary pumping regime. Lasing wavelengths are detected in the visible wavelength region around 600 nm. Finite element simulations indicate that lasing occurs in fundamental TE/TM cavity modes, as these modes have - in comparison to higher order cavity modes - the smallest mode volume and the largest overlap with the gain material. In addition, we investigate the effect of dye concentration on lasing wavelength and threshold by comparing samples with four different concentrations of rhodamine 6G. Observations are explained by modifying the standard dye laser model.

KW - Finite element analysis

KW - Whispering gallery mode

KW - Laser

KW - Polymer microcavity

KW - High-Q, dye

U2 - 10.1117/12.874808

DO - 10.1117/12.874808

M3 - Article in proceedings

VL - 7913

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Proceedings of SPIE

PB - SPIE - International Society for Optical Engineering

T2 - Laser Resonators and Beam Control

Y2 - 1 January 2011

ER -

Lasing in dye-doped high-Q conical polymeric microcavities

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