Journal
OPTICS LETTERS
Volume 40, Issue 20, Pages 4639-4642Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.40.004639
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- Max Planck Institute for the Science of Light
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We demonstrate experimentally and theoretically that the core-guided mode in helically twisted photonic crystal fiber exhibits resonantly enhanced optical activity and circular dichroism in the vicinity of anti-crossings with leaky orbital angular momentum (OAM) modes in the cladding. This arises because the anti-crossings for left and right circularly polarized core modes occur at slightly different wavelengths. (C) 2015 Optical Society of America
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