Spatial nonreciprocity in waveguide second-order processes

Treviño‐Palacios, Carlos G.; Stegeman, George I.; Baldi, Pascal

doi:10.1364/ol.21.001442

Cited by 34 publications

(15 citation statements)

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“…These "optical diodes" include fluorescent dyes with a concentration gradient [5], absorbing multilayer systems [6], and second harmonic generators with a spatially varying wave vector mismatch [7]. An electro-tunable optical isolator based on liquid-crystal heterojunctions, showing nonreciprocal transmission of circularly polarized light in photonic bandgap regions, has been reported [8].…”

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On-chip optical diode based on silicon photonic crystal heterojunctions

2011

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Optical isolation is a long pursued object with fundamental difficulty in integrated photonics. As a step towards this goal, we demonstrate the design, fabrication, and characterization of on-chip wavelength-scale optical diodes that are made from the heterojunction between two different silicon two-dimensional square-lattice photonic crystal slabs with directional bandgap mismatch and different mode transitions. The measured transmission spectra show considerable unidirectional transmission behavior, in good agreement with numerical simulations. The experimental realization of on-chip optical diodes using all-dielectric, passive, and linear silicon photonic crystal structures may help to construct on-chip optical logical devices without nonlinearity or magnetism, and would open up a road towards photonic computers.

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“…An efficient routine to create optical diode is via time-reversal symmetry breaking [5][6][7][8][9][10][11][12][13][14][15][16][17][20][21][22] or spatial inversion symmetry breaking [23]. Both these effects could lead to the optical isolation in any device where the forward and backward transmissivity of light is very much different.…”

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confidence: 99%

On-chip optical diode based on silicon photonic crystal heterojunctions

2011

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“…In this manner, the Faraday effect has long served as a routine principle for achieving optical isolation [1][2][3][4]. With increased demand for nonmagnetic optical isolation, various alternative mechanisms have been proposed, such as the use of graded dissipative media, left-handed periodic structures with a Kerr nonlinear defect layer, and dynamic photonic materials that allow photonic transitions [5][6][7][8][9][10][11][12][13]. In recent decades, considerable attention has been paid to photonic crystals [14][15][16][17][18][19] and nonlinear optical processes [20,21].…”

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confidence: 99%

Optical isolator based on the electro-optic effect in periodically poled lithium niobate with the addition of a half domain

2012

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We propose an optical isolator based on the electro-optic (EO) effect of periodically poled lithium niobate (PPLN). When the EO effect occurs in PPLN under a TE field, each domain serves as a half-wave plate under the quasi-phase-matching condition, and PPLN shows optical activity similar to quartz. The introduction of an additional half-domain to the normal PPLN changes the incident azimuth angle of the reflected light. As a result, the reflected light does not return to the original polarization state. Thus, the optical rotation accumulates and optical isolation occurs. The isolator can be employed for all linearly polarized light and has the advantage of being used in a weak-light system with low driving voltage and high isolation contrast.

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“…Violation of optical reciprocity can be achieved by different mechanisms, including nonlinearity [3,4], magneto-optical effect [5][6][7][8] and mode conversion [9,10]. The proposed ways to achieve acoustic nonreciprocity are either based on nonlinearity [11][12][13][14][15][16][17][18][19][20], that requires rather high signal powers; mechanical rotation [21], temporal modulation of acoustic properties [22,23] or introduction of a temperature gradient [24], that are difficult to realize at nanoscale.…”

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Phonoritonic Crystals with a Synthetic Magnetic Field for an Acoustic Diode

Poshakinskiy

Poddubny

2017

Phys. Rev. Lett.

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We develop a rigorous theoretical framework to describe light-sound interaction in the laser-pumped periodic multiple-quantum-well structure accounting for hybrid phonon-polariton excitations, termed phonoritons. We show that phonoritons exhibit the pumping-induced synthetic magnetic field in the artificial "coordinate-energy" space that makes transmission of left- and right- going waves different. The sound transmission nonreciprocity allows one to use such phonoritonic crystals with realistic parameters as optically controlled nanoscale acoustic diodes.

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Spatial nonreciprocity in waveguide second-order processes

Abstract: We show numerically and experimentally that second-harmonic generation in spatially nonsymmetrical structures can show a direction-dependent or nonreciprocal behavior under a variety of conditions.

Cited by 34 publications

References 9 publications

On-chip optical diode based on silicon photonic crystal heterojunctions

On-chip optical diode based on silicon photonic crystal heterojunctions

Optical isolator based on the electro-optic effect in periodically poled lithium niobate with the addition of a half domain

Phonoritonic Crystals with a Synthetic Magnetic Field for an Acoustic Diode

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