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Proceedings Paper

Photonic lattices in organic microcavities: Bloch states and control of lasing
Author(s): Andreas Mischok; Robert Brückner; Hartmut Fröb; Vadim G. Lyssenko; Karl Leo
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Paper Abstract

Organic microcavities comprising the host:guest emitter system Alq3:DCM offer an interesting playground to experimentally study the dispersion characteristics of laterally patterned microlasers due to the broad emission spectrum and large oscillator strength of the organic dye. By structuring of metallic or dielectric sublayers directly on top of the bottom mirror, we precisely manipulate the mode structure and influence the coherent emission properties of the device. Embedding silver layers into a microcavity leads to an interaction of the optical cavity-state in the organic layer and the neighboring metal which red-shifts the cavity resonance, creating a Tamm-plasmon-polariton state. A patterning of the metal can in turn be exploited to fabricate deep photonic wells of micron-size, efficiently confining light in lateral direction. In periodic arrays of silver wires, we create a Kronig-Penney-like optical potential in the cavity and in turn observe optical Bloch states spanning over several photonic wires. We modify the Kronig-Penney theory to analytically describe the full far-field emission dispersion of our cavities and show the emergence of either zero- , π-, or 2π- phase-locking in the system. By investigating periodic SiO2 patterns, we experimentally observe stimulated emission from the ground and different excited discrete states at room temperature and are able to directly control the laser emission from both extended and confined modes of the photonic wires at room-temperature.

Paper Details

Date Published: 22 September 2015
PDF: 11 pages
Proc. SPIE 9566, Organic Light Emitting Materials and Devices XIX, 95660T (22 September 2015); doi: 10.1117/12.2186762
Show Author Affiliations
Andreas Mischok, TU Dresden (Germany)
Robert Brückner, TU Dresden (Germany)
Hartmut Fröb, TU Dresden (Germany)
Vadim G. Lyssenko, TU Dresden (Germany)
Karl Leo, TU Dresden (Germany)

Published in SPIE Proceedings Vol. 9566:
Organic Light Emitting Materials and Devices XIX
Franky So; Chihaya Adachi; Jang-Joo Kim, Editor(s)

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