Reduced lasing threshold from organic dye microcavities
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PhysRevB.90.035209.pdf
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Author(s)
Akselrod, Gleb Markovitch
Young, E. R.
Stone, K. W.
Palatnik, A.
Tischler, Y. R.
Bulovic, Vladimir
Date Issued
July 2014
Journal
Physical Review B
Publisher
American Physical Society
Citation
Akselrod, G. M., E. R. Young, K. W. Stone, A. Palatnik, V. Bulovic, and Y. R. Tischler. "Reduced lasing threshold from organic dye microcavities" Phys. Rev. B 90, 035209 (July 2014). © 2014 American Physical Society
Version
Final published version
Abstract
We demonstrate an unexpected tenfold reduction in the lasing threshold of an organic vertical microcavity under subpicosecond optical excitation. In contrast to conventional theory of lasing, we find that the lasing threshold depends on the rate at which excitons are created rather than the total energy delivered within the exciton lifetime. The threshold reduction is discussed in the context of microcavity-enhanced super-radiant coupling between the excitons. The interpretation of super-radiance is supported by the temporal relaxation dynamics of the microcavity emission, which follows the super-radiance time rather than the cavity lifetime. This demonstration suggests that room-temperature super-radiant effects could generally lower the threshold in four-level lasing systems of similar relaxation dynamics.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. School of Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.90.035209
