Enhancement of the transverse magneto-optical Kerr effect via resonant tunneling in trilayers containing magneto-optical metals

Girón-Sedas, J. A.; Mejía‐Salazar, J. R.; Moncada-Villa, E.; Porras‐Montenegro, N.

doi:10.1063/1.4959087

Cited by 14 publications

(9 citation statements)

References 27 publications

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“…of T-MOKE experiments is the experimental geometry of the set-up, because it allows for a more flexible design due to the spatial separation of the optical elements from the magnetic field generating components, which are arranged in perpendicular planes [37]. In the pure intensity measurement mode, T-MOKE usually produces weaker signal amplitudes than L-and P-MOKE [38,39], but previous works have demonstrated that with the effective polarization detection measurement scheme [37,40], the sensitivity of T-MOKE measurements can be improved significantly and made comparable to L-MOKE measurements [37,40].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity and reproducibility of transverse magneto-optical Kerr effect (T-MOKE) ellipsometry

Valderrama¹,

Quintana²,

Martínez-de-Guerenu³

et al. 2022

J. Phys. D: Appl. Phys.

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We report a comprehensive experimental study to analyze the limiting factors and physical mechanisms that determine the achievable performance of Transverse Magneto-Optical Kerr Effect (T-MOKE) ellipsometry. Specifically, we explore different approaches to achieve high sensitivity and reduced acquisition times. The best sensitivity is observed for an incident light polarization with balanced s-p components. We also verify experimentally that the method’s theoretical description is accurately describing data for any s-p combination of the incoming light. Furthermore, two alternative measurement strategies are explored by using different measurement sequences for the polarization sensitive optics, which both achieve a very comparable, high quality of results. Signal-to-noise ratios and systematic deviations are measured and analyzed based on a large number of nominally identical measurement repeats, both for entire signal sequences as well as for individual Fourier components of the magneto-optical signal generated by a sinusoidal magnetic field sequence. Hereby, we observe that while higher order Fourier components have a significantly reduced signal amplitude and correspondingly exhibit reduced signal-to-noise and repeatability performance, signal-to-noise ratios always exceed values of 100 even for the lowest signal Fourier component and the lowest signal sample that we investigated, illustrating the extremely precise nature of T-MOKE ellipsometry.

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Section: Introductionmentioning

confidence: 99%

Sensitivity and reproducibility of transverse magneto-optical Kerr effect (T-MOKE) ellipsometry

Valderrama¹,

Quintana²,

Martínez-de-Guerenu³

et al. 2022

J. Phys. D: Appl. Phys.

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“…For example, the resonant tunneling effect in a trilayer structure consisting of a ferromagnetic metal and a dielectric has been employed to enhance both the Faraday effect and the TMOKE. 45,46) The TMOKE can be maximized when the tunneling condition occurs where R p (+/−M) becomes zero by perfect transmission instead of absorption by SPPs coupling although a high loss of the ferromagnetic metal hampers the transmission and the experimental demonstration is challenging. As can be seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

Fe thicknesses dependence of attenuated total reflection response in magnetoplasmonic double dielectric structures: angular versus wavelength interrogation

Kaihara¹,

Shimodaira²,

Suzuki³

et al. 2019

Jpn. J. Appl. Phys.

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Al2O3/SiO2/Fe/Au structures with different Fe thicknesses were fabricated using different deposition techniques. Due to the cutoff condition of surface plasmon polaritons in the double-layer dielectric structure and magneto-optical effect, the reflectivity spectra show a minimum and its angular and wavelength positions can be modulated by the magnetic field. For thin Fe layers, the magnetic field modulates mainly the angular position, whereas for thick Fe layers both wavelength and angular positions are modulated. The proposed structure and the angular and wavelength dependence suggest two feasibilities of (1) two selectable interrogation modes: whereas for structures with thin Fe layers angular interrogation mode is preferred, with thick Fe layers wavelength interrogation mode is more appropriate, and (2) discrimination of analyte in the complex space: the refractive shift in the real part would dominantly appear in the angular interrogation, while the imaginary part in the wavelength interrogation.

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“…As shown below, the enhanced TMOKE can be only observed under the resonant tunneling condition. That is to say, when the reflection amplitude for the p-polarized waves meets the condition [18]…”

Section: Calculation Modelmentioning

confidence: 98%

“…To solve these issues, some works have employed hybrid approaches involving perforated metals [17]. Recently, trilayer structures featuring a dielectric layer sandwiched between subwavelength-width MO-metal layers were proposed to enhance the TMOKE values via resonant tunneling [18]. Inspired by these works, we propose a new structure to enhance the TMOKE values via resonant tunneling, which consists of a magnetic dielectric layer sandwiched between subwavelength-width non-magnetic metal layers.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the transverse magneto-optical Kerr effect via resonant tunneling in Au/Ce:YIG/Au trilayers and its application

Tang

Zhang

et al. 2016

Laser Phys.

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We propose a new structure to enhance the transverse magneto-optical Kerr effect (TMOKE) via resonant photon tunneling. In trilayer structures with a magnetic dielectric layer sandwiched between non-magnetic metal layers, an enhanced TMOKE can be observed. The TMOKE in Au/Ce:YIG/Au trilayers with different widths of magnetic dielectric layers are calculated using a 4 × 4 transfer-matrix method, in which the maximum absolute value reaches 0.7. Based on the enhanced TMOKE, we apply the structure proposed above in magnetic field sensing, and TMOKE values are calculated when the external magnetic field intensity is increasing. Compared with other magnetic field sensing methods, the Au/Ce:YIG/ Au trilayer possesses a very simple structure and shows high sensitivity to magnetic field variation, which is promising as a highly integrated and sensitive magneto-optical device.

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Enhancement of the transverse magneto-optical Kerr effect via resonant tunneling in trilayers containing magneto-optical metals

Cited by 14 publications

References 27 publications

Sensitivity and reproducibility of transverse magneto-optical Kerr effect (T-MOKE) ellipsometry

Sensitivity and reproducibility of transverse magneto-optical Kerr effect (T-MOKE) ellipsometry

Fe thicknesses dependence of attenuated total reflection response in magnetoplasmonic double dielectric structures: angular versus wavelength interrogation

Enhancement of the transverse magneto-optical Kerr effect via resonant tunneling in Au/Ce:YIG/Au trilayers and its application

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