In-plane magnetization of garnet films imaged by proximal probe nonlinear magneto-optical microscopy

Wegner, Daniel; Conrad, U.; Güdde, J.; Meyer, G.; Crecelius, T.; Bauer, Andreas

doi:10.1063/1.1302734

Cited by 19 publications

(7 citation statements)

References 13 publications

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“…In this case magnetization-induced SHG adds to the non-magnetic contribution from the component of the electric field perpendicular to the surface. However, in the case of non-centrosymmetric materials, the contribution from the bulk of the magnetic material should be taken into account, and the exact form of χ m ijkl tensor will be crucial for the contrast mechanism (Wegner et al . 2000).…”

Section: (B) Shg Imaging Of Magnetic Domainsmentioning

confidence: 99%

Near-field second-harmonic generation

Zayats

Smolyaninov

2004

Philosophical Transactions of the Royal Society of London. Seri

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Near-field microscopy of second-harmonic generation combines high surface sensitivity of the nonlinear optical process and high spatial resolution of the near-field optics. It enables investigation of nonlinear optical phenomena at the nanoscale and provides an opportunity to develop a highly sensitive optical technique for materials characterization. In this paper we overview apertured and apertureless near-field approaches for local studies of second-harmonic generation. Near-field second-harmonic generation at metal surfaces and nanostructures and related electromagnetic field enhancement and confinement effects are considered. The latter demonstrates the feasibility of achieving nanoscale light sources using second-harmonic generation. Applications of second-harmonic near-field microscopy for characterization of magnetic and ferroelectric materials are also discussed. Nonlinear nano-optics can lead to the development of novel photonic devices on the sub-wavelength-scale as well as new tools for imaging and local optical studies of materials, chemical and biological species.

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Section: (B) Shg Imaging Of Magnetic Domainsmentioning

confidence: 99%

Near-field second-harmonic generation

Zayats

Smolyaninov

2004

Philosophical Transactions of the Royal Society of London. Seri

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“…The mechanisms determining the contrast of magnetic domain imaging are the magneto-optical Faraday and Kerr effects [10] in the transmission and reflection geometries, respectively, relying on the changes in polarisation of the incident light and/or the reflectance. Previously, a number of works have been done for the application of SNOM to the observation of magnetic domains, including transmission mode [11,12], reflection mode which is more versatile for opaque or metallic ferromagnetic structures [13][14][15] and SNOM with optical second-harmonic generation [16,17]. Most of these works are focused on the magnetic domain imaging whose magnetisation is oriented perpendicular to the surface, and only a small number report the imaging of magnetic domains that have in-plane magnetisation direction [12].…”

Section: Introductionmentioning

confidence: 98%

Near-field magneto-optical analysis in reflection mode SNOM

Takahashi¹,

Dickson²,

Pollard³

et al. 2004

Ultramicroscopy

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“…Second-order non-linear susceptibility depends linearly on magnetisation. In combination with high surface and interface sensitivity of secondharmonic generation, this has led to the use of MSHG in conjunction with either conventional microscopy techniques 28 or SNOM 29,30 for the imaging of magnetic domain structures. MSHG is particularly sensitive since non-linear Kerr rotations are almost two orders of magnitude greater the corresponding linear roation 27 making this a promising technique for domain observation.…”

Section: Introductionmentioning

confidence: 99%

Imaging of magnetic domain structures using optical techniques

et al. 2003

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High-resolution optical techniques for the imaging of magnetic domains in ferromagnetic materials such as confocal microscopy and scanning near-field optical microscopy are discussed. The imaging capabilities of different techniques and image formation are investigated in the case of in-plane as well as out-of-plane magnetic anisotropy in different polarisation configurations. It is shown that the magneto-optical resolution of near-field measurements depends on the film thickness and is limited by the diffraction on magnetic domains throughout the film. For thin magnetic films, subwavelength resolution can be achieved. High-resolution optical imaging is required for characterisation of the micromagnetic and magneto-optical properties of novel magnetic materials in order to adopt a bottom-up approach in the search for new materials with improved characteristics.

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In-plane magnetization of garnet films imaged by proximal probe nonlinear magneto-optical microscopy

Abstract: Polycrystalline magnetic garnet films comprising weakly coupled crystallites for piezoelectrically-driven magnetooptic spatial light modulators A spectroscopic study of the nonlinear magneto-optical response of garnets

Cited by 19 publications

References 13 publications

Near-field second-harmonic generation

Near-field second-harmonic generation

Near-field magneto-optical analysis in reflection mode SNOM

Imaging of magnetic domain structures using optical techniques

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