Two-Dimensional Magneto-Optic Spatial Light Modulator For Signal Processing

Ross, William E.; Psaltis, Demetri; Anderson, Robert

doi:10.1117/12.7973148

Cited by 183 publications

(56 citation statements)

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“…We expect the demonstrated concept to have applications in highly integrated optics, demanding actively controlled optical modulation, 20 magnetic field sensing 18,19 and optical isolation. [24][25][26][27][28][29] Furthermore, the presented structure geometry is suitable for large-area fabrication, 58,59 which makes it a promising candidate design for non-reciprocal coatings of optical elements, such as lenses, with active external control at specific wavelengths.…”

Section: Discussionmentioning

confidence: 99%

“…The magnetic-field-dependent Faraday rotation angle can be directly utilized in magnetic field sensing 18,19 and optical modulation. 20 In contrast to optical activity 21 the Faraday rotation is a non-reciprocal 22,23 polarization rotation effect. This fact means that the sign of the rotation is always relative to the direction of the magnetic field, whereas optically active media rotate the polarization relative to the direction of the wave vector.…”

Section: Introductionmentioning

confidence: 99%

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Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

et al. 2015

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We experimentally demonstrate an ultra-thin plasmonic optical rotator in the visible regime that induces a polarization rotation that is continuously tunable and switchable by an external magnetic field. The rotator is a magneto-plasmonic hybrid structure consisting of a magneto-optical EuSe slab and a one-dimensional plasmonic gold grating. At low temperatures, EuSe possesses a large Verdet constant and exhibits Faraday rotation, which does not saturate over a regime of several Tesla. By combining these properties with plasmonic Faraday rotation enhancement, a large tuning range of the polarization rotation of up to 8.46 for a film thickness of 220 nm is achieved. Furthermore, through experiments and simulations, we demonstrate that the unique dispersion properties of the structure enable us to tailor the wavelengths of the tunable polarization rotation to arbitrary spectral positions within the transparency window of the magneto-optical slab. The demonstrated concept might lead to important, highly integrated, non-reciprocal, photonic devices for light modulation, optical isolation, and magnetic field optical sensing. The simple fabrication of EuSe nanostructures by physical vapor deposition opens the way for many potentially interesting magneto-plasmonic systems and three-dimensional magneto-optical metamaterials.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

et al. 2015

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“…10) The MO properties in the MPCs and the MO cavities can be controlled by carefully designing the thickness of each layer in the stacked structures. Very thin isolators in integrated optics 11) , spatial light modulators with high switching speed [12][13][14] , and high density media in MO recording systems will be realized by large Faraday and Kerr rotations in these stacked layer structures. Moreover, the MO enhancement induced by SPRs in magnetic layered structures has recently attracted considerable attention.…”

Section: Introductionmentioning

confidence: 99%

Magneto-Optical Enhancement and Chemical Sensing Applications of Perpendicular Magnetic CoPt/Ag Stacked Structures with a ZnO Intermediate Layer

2016

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The magneto-optical (MO) properties of perpendicular magnetic Co 80 Pt 20 /Ag stacked lms with ZnO intermediate layers of different thickness were investigated by polar Kerr measurements. The insertion of a thin ZnO layer at the CoPt/Ag interface improved the perpendicular magnetic properties and MO enhancement at the plasma edge of Ag. The CoPt/Ag stacked lms with a 2-nm-thick ZnO layer exhibited an ideal square out-of-plane hysteresis loop with a relatively large Kerr angle of approximately 1.4 in the ultraviolet region. The peak position of the MO plasma enhancement shifted to longer wavelength as the thickness of the ZnO layer increased, and a new peak appeared consistent with the band-gap energy of ZnO. Moreover, the CoPt/ZnO/Ag stacked layer acted as a Fabry-Pérot etalon when the thickness of the ZnO layer was the sub-wavelength of incident light. As a result, a MO cavity was realized in the stacked lms, and an ideal square MO loop with a large Kerr rotation angle of approximately 20 was obtained in the visible region. The MO enhancement factor reached approximately 200. We demonstrated that the stacked lms were sensitive to changes in the optical conditions at the lm surface. The developed MO cavity can act as a highly accurate chemical and biological sensing system under simple measurement conditions.

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“…Conventionally, optical modulators are realized by taking advantages of inherent material properties, including 1) electro-optic effects in nonlinear optical materials (LiNbO 3 crystals or polymers) that are found in fiber optic processors [1][2][3]; 2) alignment of polarizations in liquid crystals, which are key components in display technologies [4,5]; 3) electroabsorption effects in quantum wells, or silicon, which are generally applied in integrated optics [6][7][8][9]; 4) acousto-optic effects by refractive modulations in silica glasses using ultrasound waves [10,11], and 5) magneto-optics [12,13]. The modulating capabilities of these devices generally depend on external stimuli (e.g., applied voltages, ultrasound waves), which often need direct contacts with electrodes or vibrating crystals, thus limiting their applications in certain environments.…”

Section: Introductionmentioning

confidence: 99%

Temporal Modulation of Light Intensity via 1d Time-Variant Photonic Crystal Structure

Yong

Chen

et al. 2013

PIER

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Abstract-In this work, we show that light intensity modulation can be realized in the system of one-dimensional time-variant photonic crystals. Different from conventional light modulators, the functioning of the proposed structure emphasizes on its spatial/temporal structures instead of inherent material properties. Additionally, our system can perform inherent light modulation without introducing external stimuli, thus avoiding direct contacts with electrodes (or other modulation sources), which would be preferable in certain environments. The influences of parameters such as light frequency, structure dimensions, and refractive index contrasts on the modulation performance of the time-variant photonic crystal were investigated by numerical simulations. The results provide a new strategy for light modulation, which may add functionalities in optical communication, integrated-optics or display technologies.

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Two-Dimensional Magneto-Optic Spatial Light Modulator For Signal Processing

Cited by 183 publications

References 0 publications

Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

Magneto-Optical Enhancement and Chemical Sensing Applications of Perpendicular Magnetic CoPt/Ag Stacked Structures with a ZnO Intermediate Layer

Temporal Modulation of Light Intensity via 1d Time-Variant Photonic Crystal Structure

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