Photonic lattices in organic microcavities: Bloch states and control of lasing

Andreas Mischok; Robert Brückner; Hartmut Fröb; Vadim G. Lyssenko; Karl Leo

doi:10.1117/12.2186762

22 September 2015 Photonic lattices in organic microcavities: Bloch states and control of lasing

Andreas Mischok, Robert Brückner, Hartmut Fröb, Vadim G. Lyssenko, Karl Leo

Proceedings Volume 9566, Organic Light Emitting Materials and Devices XIX; 95660T (2015) https://doi.org/10.1117/12.2186762
Event: SPIE Organic Photonics + Electronics, 2015, San Diego, California, United States

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.

Citation Download Citation

Andreas Mischok, Robert Brückner, Hartmut Fröb, Vadim G. Lyssenko, and Karl Leo "Photonic lattices in organic microcavities: Bloch states and control of lasing", Proc. SPIE 9566, Organic Light Emitting Materials and Devices XIX, 95660T (22 September 2015); https://doi.org/10.1117/12.2186762

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