Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 18: Plasmons, plasmonic laser, and spaser

HL 18.1: Talk

Monday, March 16, 2015, 15:45–16:00, EW 203

Metal-Organic Microcavities: Utilizing Tamm-Plasmon-Polaritons for Observing Photonic Bloch States — •Andreas Mischok¹, Robert Brückner¹, Alexander A. Zakhidov^1,2, Vadim G. Lyssenko¹, Hartmut Fröb¹, and Karl Leo¹ — ¹Institut für Angewandte Photophysik, Technische Universität Dresden, George-Bähr Str. 1, 01069 Dresden — ²Texas State University, 601 University Drive, San Marcos, Texas, United States

Organic small molecule semiconductors provide large oscillator strengths, high quantum efficiencies and broad tunable emission spectra, ideal for an application in low-threshold microcavity lasers. We fabricate such cavities and add a photolithographically patterned silver layer next to the organic emitter system. Embedding metallic layers into such a microcavity leads to the interaction of the optical cavity-state in the organic layer and the neighbouring 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, that efficiently confine light in the lateral direction [1]. In periodic arrays of silver wires we can create a Kronig-Penney-like optical potential in the cavity and in turn observe optical Bloch states spanning over several of these photonic wires [2]. 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 [3].

[1] APL 105, 051108; [2] Advanced Optical Materials 2(8), 746;

[3] Nature Photonics 6, 322.