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HL: Fachverband Halbleiterphysik

HL 107: Microcavities, polaritons and condensates

HL 107.10: Vortrag

Freitag, 20. März 2015, 12:45–13:00, EW 015

The role of the local density of optical states in the frequency conversion of light in a microcavity — Emre Yüce¹, Henri Thyrrestrup¹, •Georgios Ctistis^1,2, Julien Claudon^3,4, Jean-Michel Gérard^3,4, and Willem L. Vos¹ — ¹Complex Photonic Systems (COPS), MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands — ²Nano-Bio Interfaces, Saxion University of Applied Sciences, Enschede, The Netherlands — ³CEA/INAC/SP2M, Nanophysics and Semiconductor Laboratory, Grenoble, France — ⁴4 University Grenoble Alpes, INAC-SP2M, Nanophysics and Semiconductors Lab, F-38000 Grenoble, France

Converting light to a controllable frequency is well-known in traditional non-linear optics. In modern nanophotonics one frequency converts light which is trapped in a cavity or waveguide. Supposedly, the physics of frequency conversion differs between traditional non-linear optics and modern nanophotonics, regarding the rate of change and output spectrum. Here, we unify these disparate views. To this end, we consider a nanophotonic system, a planar microcavity, sustaining both a cavity resonance and a flat continuum of modes. We study the frequency conversion that occurs when the cavity is switched in an ultrafast way via the electronic Kerr effect [1]. We thereby observe either a red- or a blue-shift of the confined light, depending on the timing of the pulses in the pump-probe experiment. We study color-conversion for different quality factors, which allows us to identify the role of the local density of optical states available to the generated light.

[1] E. Yüce et al., arXiv:1406.3586 (2014)