Fast, sensitive magnetic-field sensors based on the Faraday effect in YIG

Deeter, M. N.; Rose, Allen; Day, Gordon W.

doi:10.1109/50.62880

Cited by 88 publications

(36 citation statements)

References 14 publications

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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%

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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%

“…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.…”

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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“…The combination of low magnetic damping, soft magnetization behavior, and a band gap of 2.66 eV, making it a good insulator, qualify this material for microwave applications such as filters [3,4] or sensors [5,6]. Its low absorption in the optical and near-infrared wavelength region, combined with a magneto-optic Faraday effect (FE), render this material interesting for telecommunication devices such as magneto-optic isolators [7,8].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Magneto-optic Kerr Effect and Magnetic Properties ofCeY2Fe5O12
Kehlberger
¹
,
Richter
²
,
Onbaşlı
³

et al. 2015
Phys. Rev. Applied
92
10
41
0
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The magnetic and magneto-optic properties of epitaxial CeY 2 Fe 5 O 12 (Ce∶YIG) and Y 3 Fe 5 O 12 (yttrium iron garnet or YIG) thin films grown by pulsed laser deposition on gadolinium gallium garnet substrates are determined. An enhanced Faraday effect is known to result from Ce substitution into the yttrium iron garnet lattice, and here we characterize the magneto-optic Kerr effect, as well as the magnetic hysteresis and ferromagnetic resonance response that result from the Ce substitution. X-ray diffraction analysis reveals a high crystallographic quality for the Ce∶YIG films. Measurements of the magneto-optic Kerr effect for two different wavelengths demonstrate that the Ce∶YIG exhibits an up-to-tenfold increase in Kerr rotation compared to YIG. The Ce∶YIG has a slightly larger magnetic moment, as well as increased magnetic damping and higher magnetic anisotropy compared to YIG with a dependence on the crystalline orientation. By specific cerium substitution in YIG, our results show that the engineering of a large Kerr effect and tailored magnetic anisotropy becomes possible as required for magneto-optically active spintronic devices.

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“…[9]" This interaction, appropriately enough, came to be known as the Faraday effect. This effect has been used for the measurement of magnetic fields [10], characterization of electron spins in semiconductors [11], and many other purposes. However, it is perhaps most significant as the first empirical evidence for the relationship between light and magnetism, and therefore the beginning of the entire field of magneto-optics.…”

Section: Magneto-optical Microscopymentioning

confidence: 99%

Modeling the Optical Response to a Near-Field Probe Tip from a Generalized Multilayer Thin Film

Lawrence¹

2000

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The contrast mechanism in Kerr imaging is the apparent angle through which the plane of polarization is rotated upon reflection from a magnetic surface. This can be calculated for a well characterized surface given the polarization state of the incident light. As in traditional optical microscopy, the spatial resolution is limited by diffraction to roughly half the wavelength of the illumination light.The diffraction limit can be circumvented through the use of near-field scanning optical microscopy, in which the illumination source is an evanescent field at the tip of a tapered optical fiber. A novel probe design for near-field optical imaging in reflection mode will be proposed, and experimental work on the development of a near-field Kerr microscope performed up to this point will be presented.The complication in merging these two techniques arises from the complex polarization profile of the evanescent field. This profile can be characterized for a given probe geometry with the use of electromagnetic field modeling software, allowing for subsequent modeling of the polarization profile of the optical response. An algorithm for predicting the optical response to a near-field probe tip from a generalized multilayer thin-film is presented.

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Fast, sensitive magnetic-field sensors based on the Faraday effect in YIG

Cited by 88 publications

References 14 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

Enhanced Magneto-optic Kerr Effect and Magnetic Properties ofCeY2Fe5O12
Kehlberger
¹
,
Richter
²
,
Onbaşlı
³

et al. 2015
Phys. Rev. Applied
92
10
41
0
View full text Add to dashboard Cite

Modeling the Optical Response to a Near-Field Probe Tip from a Generalized Multilayer Thin Film

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Fast, sensitive magnetic-field sensors based on the Faraday effect in YIG

Cited by 88 publications

References 14 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

Enhanced Magneto-optic Kerr Effect and Magnetic Properties ofCeY2Fe5O12Kehlberger1, Richter2, Onbaşlı3 et al. 2015Phys. Rev. Applied9210410View full textAdd to dashboardCite

Modeling the Optical Response to a Near-Field Probe Tip from a Generalized Multilayer Thin Film

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Product

Resources

About

Enhanced Magneto-optic Kerr Effect and Magnetic Properties ofCeY2Fe5O12
Kehlberger
¹
,
Richter
²
,
Onbaşlı
³

et al. 2015
Phys. Rev. Applied
92
10
41
0
View full text Add to dashboard Cite