Magnetooptic Spatial Light Modulator for Volumetric Digital Recording System

Park, Jae-Hyuk; Cho, Jaekyong; Nishimura, Kazuhiro; Inoue, M.

doi:10.1143/jjap.41.1813

Cited by 40 publications

(15 citation statements)

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“…Remarkably, it becomes possible to fabricate highly ordered three-dimensional dot crystals under suitable spatial strain anisotropy [38]. A further progress in this direction is particularly timely as it could result in the development of high-density 3D memories and spatial light modulators for advanced photonic applications [39]. A new method of self-organized growth has recently been proposed by the present author [40].…”

Section: Nonuniform Ferromagnetic Dms -Chemicalmentioning

confidence: 97%

High Temperature Ferromagnetism and Nano-Scale Phase Separations in Diluted Magnetic Semiconductors and Oxides

Dietl

2007

Acta Phys. Pol. A

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In this paper the present understanding of the origin of ferromagnetic response that has been detected in a number of diluted magnetic semiconductors and diluted magnetic oxides at room temperature is outlined. It is argued that in these systems, owing to a typically small solubility of magnetic ions, crystallographic or chemical phase separation into regions with a large and a small concentration of magnetic component takes place. The ferromagnetic signatures then come from the regions with a large concentration of magnetic ions, which show non-zero spontaneous magnetization up to the blocking temperature, whose magnitude is proportional to the nanocrystal volume and magnetic anisotropy. Novel methods enabling a control of nano-assembling of magnetic nanocrystals in non-conducting matrices as well as possible functionalities of these spatially modulated magnetic systems are described. We also discuss phase separations into paramagnetic and ferromagnetic regions, which are driven by the Anderson-Mott localization and/or competing ferromagnetic and antiferromagnetic interactions. Finally, the question whether the high temperature ferromagnetism is possible in materials without magnetic ions is addressed.

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Section: Nonuniform Ferromagnetic Dms -Chemicalmentioning

confidence: 97%

High Temperature Ferromagnetism and Nano-Scale Phase Separations in Diluted Magnetic Semiconductors and Oxides

Dietl

2007

Acta Phys. Pol. A

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“…III, VI, VII, and VIII, MCD was reported for decomposed (Ga,Mn)As, (Ge,Mn), (Ge,Fe), and (Zn,Cr)Te as well as for other systems such as (Ga,Mn)P (Monette et al, 2010). A combination of strong and spectrally broad MCD specific to FM metals and weak losses characterizing the semiconductor hosts suggests possible applications of decomposed semiconductor alloys as optical isolators (Amemiya et al, 2006) as well as 3D tunable photonic crystals and spatial light modulators for advanced photonic applications (Park et al, 2002a).…”

Section: Prospects Of Spinodal Nanotechnologymentioning

confidence: 99%

Spinodal nanodecomposition in semiconductors doped with transition metals

et al. 2015

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This review presents the recent progress in computational materials design, experimental realization, and control methods of spinodal nanodecomposition under three-and two-dimensional crystal-growth conditions in spintronic materials, such as magnetically doped semiconductors. The computational description of nanodecomposition, performed by combining first-principles calculations with kinetic Monte Carlo simulations, is discussed together with extensive electron microscopy, synchrotron radiation, scanning probe, and ion beam methods that have been employed to visualize binodal and spinodal nanodecomposition (chemical phase separation) as well as nanoprecipitation (crystallographic phase separation) in a range of semiconductor compounds with a concentration of transition metal (TM) impurities beyond the solubility limit. The role of growth conditions, codoping by shallow impurities, kinetic barriers, and surface reactions in controlling the aggregation of magnetic cations is highlighted. According to theoretical simulations and experimental results the TM-rich regions appear in the form of either nanodots (the dairiseki phase) or nanocolumns (the konbu phase) buried in the host semiconductor. Particular attention is paid to Mn-doped group III arsenides and antimonides, TM-doped group III nitrides, Mn-and Fe-doped Ge, and Cr-doped group II chalcogenides, in which ferromagnetic features persisting up to above room temperature correlate with the presence of nanodecomposition and account for the application-relevant magnetooptical and magnetotransport properties of these compounds. Finally, it is pointed out that spinodal nanodecomposition can be viewed as a new class of bottom-up approach to nanofabrication.

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“…The first such MOSLM was the magneto-optic-photoconductor sandwich developed by Krumme et al [4][5][6], which was made of an epitaxial (Gd,Bi) 3 (Fe,Ga) 5 O 12 film and a Cu-doped CdS photoconductor film. For MOSLMs made of bismuth-substituted yttrium iron garnet (Bi:YIG) films, switching pixels is demonstrated at the speed of several GHz [7][8][9]. However, application of Bi:YIG films for the transmission MOSLMs is limited, since they have large absorption in the short wavelength range.…”

Section: Introductionmentioning

confidence: 99%