An Optical Micro-Magnetic Device: Magnetic-Spatial Light Modulator

Park, Jae-Hyuk; Inoue, M.; Cho, Jae-Kyeong; Nishimura, Kazuhiro; Uchida, Hironaga

doi:10.4283/jmag.2003.8.1.050

Cited by 14 publications

(10 citation statements)

References 9 publications

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“…Pixels can be controlled by reversing magnetization states of MO materials in MOSLMs. Magnetization reversal on a pixel level also reverses the magnetooptical Faraday and Kerr rotations of the pixels and these effects are observed in the output beam intensity 1–3 .…”

Section: Introductionmentioning

confidence: 92%

“…This causes Joule heating and consequently switching errors in current-driven MOSLMs 2 . Many studies were done in order to reduce power consumption by engineering the device configuration and drive lines 3,12 or material and synthesis conditions 21,22 , and voltage-driven MOSLM was proposed by Park et al . 23 to alleviate power dissipation and heating problem of drive lines.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

RGB Magnetophotonic Crystals for High-contrast Magnetooptical Spatial Light Modulators

Kharratian

Ürey

Onbaşlı

2019

Sci Rep

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Magnetooptical spatial light modulators (MOSLMs) are photonic devices that encode information in photonic waveforms by changing their amplitude and phase using magnetooptical Faraday or Kerr rotation. Despite the progress on both MO materials and switching methods, significant improvements on materials engineering and SLM design are needed for demonstrating low-power, multicolor, analog and high-contrast MOSLM devices. In this study, we present design rules and example designs for a high-contrast and large figure-of-merit MOSLM using three-color magnetophotonic crystals (MPC). We demonstrate for the first time, a three-defect MPC capable of simultaneously enhancing Faraday rotation, and high-contrast modulation at three fundamental wavelengths of red, green and blue (RGB) within the same pixel. We show using 2D finite-difference time-domain simulations that bismuth-substituted yttrium iron garnet films are promising for low-loss and high Faraday rotation MOSLM device in the visible band. Faraday rotation and loss spectra as well as figure-of-merit values are calculated for different magnetophotonic crystals of the form (H/L)p/(D/L)q/(H/L)p. After an optimization of layer thicknesses and MPC configuration, Faraday rotation values were found to be between 20–55° for losses below 20 dB in an overall thickness less than 1.5 µm including three submicron garnet defect layers. The experimental demonstration of our proposed 3-color MOSLM devices can enable bistable photonic projectors, holographic displays, indoor visible light communication devices, photonic beamforming for 5 G telecommunications and beyond.

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

RGB Magnetophotonic Crystals for High-contrast Magnetooptical Spatial Light Modulators

Kharratian

Ürey

Onbaşlı

2019

Sci Rep

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“…However, exploration of multiferroic materials and structures with strong magnetoelectric coupling becomes an open research area for voltage driving. (iii)Forming pixels smaller than 1 µm is not a serious obstacle on the way of developing advanced MOSLMs using the advanced micro/nanofabrication technologies. Depending on the driving scheme, MO material islands may not be needed; however, scaling of drive electronics to small sizes is much more challenging. (iv)In terms of modulation type, binary modulation can be performed in principle and has been experimentally demonstrated in MOSLMs but analog or multilevel modulation remains a challenge due to the hysteresis behavior in MO materials. We suggest implementing analog modulation in MOSLMs using minor hysteresis loops or return paths to different remanent state as shown in Figure .…”

Section: Open Challenges and Research Opportunities In Moslmsmentioning

confidence: 99%

“…The spectral and composition dependence of MO effects and their intensities provide characteristic signatures on the electromagnetic (EM) waves or electronic and spin structure of materials [6] This makes them suitable for various analytical chemical methods such as visible or near-infrared magnetooptical spectroscopy [7], [8], [9] x-ray magnetic circular dichroism (XMCD) [10], [11], [12] Brillouin light spectroscopy (BLS) [13] in addition to applications such as optical isolators [14], [15], [16] , circulators [17], [18], [19] , spatial light modulators [20], [21], [22] , polarized microscopy [23], [24], [25] , sensing/imaging systems [26], [27], [28] , data storage [29], [30], [31], [32] and growing field of spintronics [33], [34], [35] .…”

Section: Introductionmentioning

confidence: 99%

Advanced Materials and Device Architectures for Magnetooptical Spatial Light Modulators

Kharratian

Ürey

Onbaşlı

2019

Advanced Optical Materials

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Faraday and Kerr rotations are magnetooptical (MO) effects used for rotating the polarization of light in transmission and reflection from a magnetized medium, respectively. MO effects combined with intrinsically fast magnetization reversal, which can go down to a few tens of femtoseconds or less, can be applied in magnetooptical spatial light modulators (MOSLMs) promising for nonvolatile, ultrafast, and high‐resolution spatial modulation of light. With the recent progress in low‐power switching of magnetic and MO materials, MOSLMs may lead to major breakthroughs and benefit beyond state‐of‐the‐art holography, data storage, optical communications, heads‐up displays, virtual and augmented reality devices, and solid‐state light detection and ranging (LIDAR). In this study, the recent developments in the growth, processing, and engineering of advanced materials with high MO figures of merit for practical MOSLM devices are reviewed. The challenges with MOSLM functionalities including the intrinsic weakness of MO effect and large power requirement for switching are assessed. The suggested solutions are evaluated, different driving systems are investigated, and resulting device architectures are benchmarked. Finally, the research opportunities on MOSLMs for achieving integrated, high‐contrast, and low‐power devices are presented.

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“…where αF is the Faraday rotation per unit path length, χ is the magnetic susceptibility, n is the refractive index, M ⃗⃗⃗ is the magnetization vector, and k ⃗ is the wavevector [1,2]. Faraday effect finds applications in various optical devices including isolators [3][4][5], circulators [6][7][8], and spatial light modulators [9][10][11], as well as data storage [12][13][14], sensing/imaging systems [15][16][17], and in the growing field of spintronics [18,19]. Despite these applications, the small magnitude of the specific Faraday rotation in the majority of MO materials limits its applicability and prevents miniaturization of the MO devices [20].…”

Section: Introductionmentioning

confidence: 99%

Broadband Enhancement of Faraday Effect Using Magnetoplasmonic Metasurfaces

2020

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Magnetooptical Faraday effect enables ultrafast photonic devices based on nonreciprocal polarization rotation; however, the intrinsic weakness of Faraday effect prevents miniaturization and practical applications of nonreciprocal photonic devices. Magnetoplasmonics offers new mechanisms for enhancing magnetooptical effects using surface plasmon resonances, which generally have narrow bandwidths. Using finite-difference time-domain modelling, we demonstrate a magnetoplasmonic metasurface, which remarkably enhances the Faraday effect in a wide spectral range. While Faraday rotation in a bare bismuth-substituted yttrium iron garnet film is below 0.02° in the studied range of 600-1600 nm, the proposed metasurface yields few degrees of rotation in a broad band with a maximum exceeding 6.5°, which indicates about three orders of magnitude enhancement. We also show that by optimizing the configuration of the system including the geometry and excitation parameters, the metasurface response and operation band can be tuned further, and rotation values higher than 20° can be achieved. Finally, we present guidelines for designing magnetoplasmonic metasurfaces.

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An Optical Micro-Magnetic Device: Magnetic-Spatial Light Modulator

Cited by 14 publications

References 9 publications

RGB Magnetophotonic Crystals for High-contrast Magnetooptical Spatial Light Modulators

RGB Magnetophotonic Crystals for High-contrast Magnetooptical Spatial Light Modulators

Advanced Materials and Device Architectures for Magnetooptical Spatial Light Modulators

Broadband Enhancement of Faraday Effect Using Magnetoplasmonic Metasurfaces

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