Rostock 2019 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 8: Quantum Optics and Photonics I

Q 8.1: Vortrag

Montag, 11. März 2019, 10:30–10:45, S Ex 04 E-Tech

Resonant state expansion for exterior perturbations in photonic crystal fibers — •Swaathi Upendar¹, Izzatjon Allayarov¹, Markus Schmidt^2,3, and Thomas Weiss¹ — ¹4th Physics Institute and Research center SCoPE, University of Stuttgart, Germany — ²Leibniz Institute of Photonic Technology, Jena, Germany — ³Otto Schott Institute of Material Research, Friedrich Schiller University, Jena, Germany

Photonic crystal fibers guide light in a central defect core surrounded by a periodic cladding using a bandgap effect. It is known that the guiding properties of the photonic crystal fiber depend on the structureand the nature of materials in the core and cladding and that small changes in the cladding affect the fundamental core mode. We present our formulation of the so-called resonant state expansion as a perturbation theory for studying structural and material perturbations such as diameter disorder in the claddings of photonic crystal fibers [1]. Resonant states are solutions of Maxwell’s equations with outgoing boundary conditions in the absence of source terms. A key element in our formulation is that we derived an analytical method to correctlynormalize both guided and leaky modes.Here, we will present examples for perturbations in the interior and the exterior of the fiber cladding.

[1] S. Upendar, I. Allayarov, M. A. Schmidt, and T. Weiss, “Analytical mode normalization and resonant state expansion for optical fibers - an efficient tool to model transverse disorder,” Opt. Exp. 26 (17), 22536 (2018).