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Optical density of states near planar ENZ materials

Abstract : We study the local density of optical states (LDOS) for lossy dielectric substrates whose electric permittivity has a vanishing real part. A criterion for evaluating the threshold height above (below) which radiative (non-radiative) processes dominate for a dipole emitter is established. We focus on the case of a vertical dipole above the Epsilon-near-zero (ENZ) substrate and show that, in the lossless case, complete LDOS cancellation originates from radiative modes in its near-field. We evaluate the performance of commercially available ENZ materials and quantify the limits of such cancellation effects with the intrinsic losses of the substrate.
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https://hal-utt.archives-ouvertes.fr/hal-02569040
Contributor : Jean-Baptiste Vu Van <>
Submitted on : Sunday, May 10, 2020 - 10:28:16 PM
Last modification on : Tuesday, October 6, 2020 - 4:26:41 PM

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Claudio Silvestre Castro, Eugenio Méndez, Alexandre Vial, Gilles Lerondel, Yann Battie, et al.. Optical density of states near planar ENZ materials. Optics Letters, Optical Society of America - OSA Publishing, In press, 45 (13), pp.3593. ⟨10.1364/OL.392017⟩. ⟨hal-02569040⟩

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