Complex Faraday Rotation in Microstructured Magneto‐optical Fiber Waveguides

Schmidt, Markus A.; Wondraczek, Lothar; Lee, Ho W.; Granzow, Nicolai; Ning, De; Russell, P. St. J.

doi:10.1002/adma.201100364

Cited by 75 publications

(92 citation statements)

References 56 publications

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“…Transparent materials with large FR response at room temperature have been of great interest over the last few decades [13][14][15][16][17][18][19][20][21]. Acceptable MO performance in a composite generally requires the dispersion of a large volume fraction of MO nanoparticles, which often leads to light losses through scattering, thereby decreasing transparency and useful FR response [22,23].…”

Section: Introductionmentioning

confidence: 77%

Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite

Miles¹,

Gai²,

Gangopadhyay³

et al. 2017

Opt. Mater. Express

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Magneto-optical (MO) composites with excellent Faraday rotation (FR) response were fabricated using iron platinum (FePt) nanoparticles (NPs) and polystyrene-block-poly (2-vinyl pyridine) (PS-b-P2VP) block copolymers (BCPs). Gallic acid functionalized FePt NPs with average core diameters (dcore) of 1.9, 4.9, 5.7 and 9.3 nm have been selectively incorporated into a P2VP domain through hydrogen bonding interactions. The use of copolymer templates to selectively arrange the magnetic NPs guaranteed high MO performance with little trade-off in terms of scattering loss, providing a simple strategy to prepare functional materials for MO applications. As a result, Verdet constants of a 10 wt % loaded 4.9 nm FePt NP composite reached absolute magnitudes as high as ~-6 × 10 4 °/T-m at 845 nm, as determined by FR measurements at room temperature. At the same time, the MO figure-of-merit was as large as −25 °/T in these composites, indicating both excellent MO performance and transparency. The dependence of the nanocomposite FR properties on particle diameter, loading (from 0.1 wt % to 10 wt %) and composite nanostructure were systematically investigated at four infrared wavelengths (845, 980, 1310 and 1550 nm Herranz, "Magnetophotonic response of three-dimensional opals," ACS Nano 5(4), 2957-2963 (2011). 12. J. C. Suits, "Faraday and Kerr effects in magnetic compounds," IEEE Trans. Magn. 8(1), 95-105 (1972 219-223 (1992) 3771-3774 (2015). 67. D. P. Song, C. Li, N. S. Colella, W. Xie, S. Li, X. Lu, S. Gido, J. H. Lee, and J. J. Watkins, "Large-volume selforganization of polymer/nanoparticle hybrids with millimeter-scale grain sizes using brush block copolymers," J.

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Section: Introductionmentioning

confidence: 77%

Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite

Miles¹,

Gai²,

Gangopadhyay³

et al. 2017

Opt. Mater. Express

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“…The magnetic fi eld induces a special kind of anisotropy with two off-diagonal elements in the permittivity tensor. [ 163 ] The most important material parameter characterizing the magneto-optical (MO) response is the Verdet constant, which is directly proportional to the rotation angle of linearly polarized light. Many of currently used Faraday materials are single-crystalline and thus are hard to incorporate into optical fi bers (e.g., the state-of-the-art material is bismuth-doped yttrium-iron-garnet (Bi:YIG).…”

Section: Optical Isolationmentioning

confidence: 99%

“…[ 166 ] One of the key questions is how much of the bulk magnetooptic response can be maintained within the fi ber and what is the achievable Faraday rotation per absorption length, with the latter being the most important fi gure-of-merit parameter from the device perspective. [ 163 ] Adv. Optical Mater.…”

Section: Optical Isolationmentioning

confidence: 99%

“…Another example is a MO fi ber which has been realized via PAMF and consists of diamagnetic tellurite glass core and a silica cladding ( Figure 21 a,b). [ 163 ] The effective Verdet constant defi ned by the fundamental core mode is about 50% of the bulk value (Figure 21 c), indicating morphological variations of the fi lled glass from the purely isotropic case, which is additionally suggested by the observed magnetic dichroism, which only appears when the glass is fi lled into fi ber. In contrast to the abovementioned silicate fi ber, this hybrid fi ber has the potential to be fully integrated into current fi ber loops as the cladding material is silica.…”

Section: Optical Isolationmentioning

confidence: 99%

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Hybrid Optical Fibers – An Innovative Platform for In‐Fiber Photonic Devices

Schmidt

Argyros

Sorin

2015

Advanced Optical Materials

164

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The field of hybrid optical fibers is one of the most active research areas in current fiber optics and has the vision of integrating sophisticated materials inside fibers, which are not traditionally used in fiber optics. Novel in‐fiber devices with unique properties have been developed, opening up new directions for fiber optics in fields of critical interest in modern research, such as biophotonics, environmental science, optoelectronics, metamaterials, remote sensing, medicine, or quantum optics. Here the recent progress in the field of hybrid optical fibers is reviewed from an application perspective, focusing on fiber‐integrated devices enabled by including novel materials inside polymer and glass fibers. The topics discussed range from nanowire‐based plasmonics and hyperlenses, to integrated semiconductor devices such as optoelectronic detectors, and intense light generation unlocked by highly nonlinear hybrid waveguides.

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“…Possible sources of this change in polarization are (a) the thermal stress-induced birefringence due to the fiber clamps or due to the big temperature gradient and (b) the coupling between modes of different polarization states due to fiber defects [39]. This is the reason why thermal stress impacts the MO property and reduces the MO sensitivity for fiber transducers [40].…”

Section: Influence Of Thermal Match Of Core and Claddingmentioning

confidence: 99%

Faraday rotation influence factors in tellurite-based glass and fibers

Chen

Wang

et al. 2015

Appl. Phys. A

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The Faraday rotation influence factors in tellurite-based glass and fibers were studied by experiments and simulations. TeO 2 -ZnO-Na 2 O-BaO glass family was fabricated and characterized in terms of the thermal and magneto-optical properties. Two core-cladding pairs for two fibers were selected from fabricated glasses. The Verdet constants of the glasses and fibers were measured at different wavelengths using a homemade optical bench, and the Verdet constant of fiber was close to that of the bulk glass. The influence from external factors (wavelength, laser power and magnetic field) and internal factors (thermal expansion coefficient difference, refractive index and Verdet constant of core and cladding) on Faraday rotation in fibers was investigated and discussed, and the purpose of this study is to improve the Faraday rotation in tellurite fibers for MO device applications both from internal material property match and external parameter configuration in measurement.

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Complex Faraday Rotation in Microstructured Magneto‐optical Fiber Waveguides

Cited by 75 publications

References 56 publications

Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite

Improving Faraday rotation performance with block copolymer and FePt nanoparticle magneto-optical composite

Hybrid Optical Fibers – An Innovative Platform for In‐Fiber Photonic Devices

Faraday rotation influence factors in tellurite-based glass and fibers

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