Second-harmonic generation in longitudinal epsilon-near-zero materials

Second-harmonic generation in longitudinal epsilon-near-zero materials We investigate second-harmonic generation from anisotropic or longitudinal epsilon-near-zero materials. We find conversion efficiencies well above their isotropic counterparts owing to additional field intensity enhancement provided by the anisotropy. At the same time, anisotropic epsilon-near-zero materials are also less sensitive to the material's losses compared to the isotropic ones. In turn, these improvements become pivotal for epsilon-near-zero materials that do not possess bulk dipole-allowed quadratic nonlinearities. We predict that second-harmonic generation from a Dy:CdO/Si multilayer with longitudinal epsilon-near-zero properties can exceed the conversion efficiency of a homogeneous Dy:CdO slab of equivalent thickness by at least 20 times for almost any angle of incidence. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Second-harmonic generation in longitudinal epsilon-near-zero materials

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Second-harmonic generation in longitudinal epsilon-near-zero materials

Abstract

We investigate second-harmonic generation from anisotropic or longitudinal epsilon-near-zero materials. We find conversion efficiencies well above their isotropic counterparts owing to additional field intensity enhancement provided by the anisotropy. At the same time, anisotropic epsilon-near-zero materials are also less sensitive to the material's losses compared to the isotropic ones. In turn, these improvements become pivotal for epsilon-near-zero materials that do not possess bulk dipole-allowed quadratic nonlinearities. We predict that second-harmonic generation from a Dy:CdO/Si multilayer with longitudinal epsilon-near-zero properties can exceed the conversion efficiency of a homogeneous Dy:CdO slab of equivalent thickness by at least 20 times for almost any angle of incidence.
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Publisher
American Physical Society (APS)
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.045438
Publisher site
See Article on Publisher Site

Abstract

We investigate second-harmonic generation from anisotropic or longitudinal epsilon-near-zero materials. We find conversion efficiencies well above their isotropic counterparts owing to additional field intensity enhancement provided by the anisotropy. At the same time, anisotropic epsilon-near-zero materials are also less sensitive to the material's losses compared to the isotropic ones. In turn, these improvements become pivotal for epsilon-near-zero materials that do not possess bulk dipole-allowed quadratic nonlinearities. We predict that second-harmonic generation from a Dy:CdO/Si multilayer with longitudinal epsilon-near-zero properties can exceed the conversion efficiency of a homogeneous Dy:CdO slab of equivalent thickness by at least 20 times for almost any angle of incidence.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Jul 31, 2017

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