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Cylindrical microlasers and light emitting devices from conducting polymers

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6 Author(s)
Frolov, S.V. ; Physics Department, University of Utah, Salt Lake City, Utah 84112 ; Fujii, A. ; Chinn, D. ; Vardeny, Z.V.
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Substantially improved, photopumped polymer lasers are demonstrated using microrings and microdisks of various diameters D ranging from 5 to 200 μm. Various cavity-dependent laser modes were observed, which for D≪10 μm were dominated by a single longitudinal mode with linewidth of less than 1 Å. These microlasers were also characterized by Q of order 5000, low threshold excitation energy of order 100 pJ/pulse for pulse duration ranging from 100 ps to sub-μs, and an abrupt increase in the emission directionality and polarization degree. Light emitting diodes with cylindrical geometry, fully compatible with these microlasers are also demonstrated. © 1998 American Institute of Physics.

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Applied Physics Letters  (Volume:72 ,  Issue: 22 )