Large enhancement of interface second-harmonic generation near the zero- ¯ n gap of a negative-index Bragg grating
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Date
2006-03-06
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Citation of Original Publication
Giuseppe D’Aguanno et al., Large enhancement of interface second-harmonic generation near the zero- ¯ n gap of a negative-index Bragg grating, PHYSICAL REVIEW E, Vol. 73, Iss. 3 (2006), https://doi.org/10.1103/PhysRevE.73.036603
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain Mark 1.0
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract
We predict a large enhancement of interface second-harmonic generation near the zero- ¯n gap of a Bragg grating made of alternating layers of negative- and positive-index materials. Field localization and coherent oscillations of the nonlinear dipoles located at the structure’s interfaces conspire to yield conversion efficiencies at least an order of magnitude greater than those achievable in the same length of nonlinear, phase-matched bulk material. These findings thus point to a new class of second-harmonic-generation devices made of standard centrosymmetric materials.