Enhancement of Faraday effect in one-dimensional magneto-optical photonic crystal including a magnetic layer with wavelength dependent off-diagonal elements of dielectric constant tensor

Inui, Chie; Ozaki, Shinsuke; Kura, Hiroaki; Sato, Tetsuya

doi:10.1016/j.jmmm.2011.03.037

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…In addition to this, an interesting and rather counterintuitive idea arose, which was first introduced in [FigVit8], and also recently noticed independently in [IOKS11] for MPCs. It is the idea that reduction of losses in the magnetic composite and enhancement of the magnetic properties/functionality might actually be more substantial when the lossy magnetic component is replaced by another with even higher losses.…”

Section: Motivationmentioning

confidence: 99%

On overdamping phenomena in gyroscopic systems composed of high-loss and lossless components

Figotin

Welters

2016

Journal of Mathematical Physics

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Using a Lagrangian framework, we study overdamping phenomena in gyroscopic systems composed of two components, one of which is highly lossy and the other is lossless. The losses are accounted by a Rayleigh dissipative function. As we have shown previously, for such a composite system the modes split into two distinct classes, high-loss and low-loss, according to their dissipative behavior. A principal result of this paper is that for any such system a rather universal phenomenon of selective overdamping occurs. Namely, first of all the high-loss modes are all overdamped, i.e., non-oscillatory, as are an equal number of low-loss modes. Second of all, the rest of the low-loss modes remain oscillatory (i.e., the underdamped modes) each with an extremely high quality factor (Q-factor) that actually increases as the loss of the lossy component increases. We prove that selective overdamping is a generic phenomenon in Lagrangian systems with gyroscopic forces and give an analysis of the overdamping phenomena in such systems. Moreover, using perturbation theory, we derive explicit formulas for upper bound estimates on the amount of loss required in the lossy component of the composite system for the selective overdamping to occur in the generic case, and give Q-factor estimates for the underdamped modes. Central to the analysis is the introduction of the notion of a "dual" Lagrangian system and this yields significant improvements on some results on modal dichotomy and overdamping. The effectiveness of the theory developed here is demonstrated by applying it to an electric circuit with a gyrator element and a high-loss resistor.

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Section: Motivationmentioning

confidence: 99%

On overdamping phenomena in gyroscopic systems composed of high-loss and lossless components

Figotin

Welters

2016

Journal of Mathematical Physics

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“…However, optical performance of the DMSs typically drops down with the increasing x [3,12]. As recently shown, magneto-optical response of DMS can be efficiently enhanced while keeping x at a reasonably low level by boosting the light-matter interaction exploiting photonic [13][14][15][16] or plasmonic [17] effects. In particular, a significant enhancement of a Faraday rotation or MCD related to (Ga,Mn)As layers has been obtained thanks to embedding a DMS layer in a resonant microcavity formed by two Distributed Bragg Reflectors (DBR) [15,16].…”

Section: Introductionmentioning

confidence: 99%

Angle dependence of the photonic enhancement of the magneto-optical Kerr effect in DMS layers

Koba¹,

Suffczyński²

2014

EPL

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We investigate theoretically an angle dependence of enhancement of polar magneto-optical Kerr effect (MOKE) obtained thanks to a deposition of a paramagnetic Diluted Magnetic Semiconductor (DMS) layer on one-dimensional photonic crystal layer. Our transfer matrix method based calculations conducted for TE and TM polarizations of the incident light predict up to an order of magnitude stronger MOKE for a (Ga,Fe)N DMS layer when implementing the proposed design.The maximum enhancement for TE and TM polarization occurs for the light incidence at the normal and at the Brewster angle, respectively. This indicates a possibility of tuning of the MOKE enhancement by adjustment of the polarization and the incidence angle of the light.

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“…Incorporation of a ferromagnetic material into an optical cavity is very promising for achieving efficient control of light via an external magnetic field. So far, almost all magneto-optical resonators have been based on using a thin magnetic film sandwiched in-between two dielectric Bragg mirrors, and these structures are commonly referred to as 1D magnetophotonic crystals [ 12 , 13 , 14 , 15 ]. Magneto-optical cavities inside 2D and 3D periodic dielectric structures were studied as well [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Tunable Optical Nanocavity of Iron-garnet with a Buried Metal Layer

et al. 2015

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We report on the fabrication and characterization of a novel magnetophotonic structure designed as iron garnet based magneto-optical nanoresonator cavity constrained by two noble metal mirrors. Since the iron garnet layer requires annealing at high temperatures, the fabrication process can be rather challenging. Special approaches for the protection of metal layers against oxidation and morphological changes along with a special plasma-assisted polishing of the iron garnet layer surface were used to achieve a 10-fold enhancement of the Faraday rotation angle (up to 10.8°/µm) within a special resonance peak of 12 nm (FWHM) linewidth at a wavelength of 772 nm, in the case of a resonator with two silver mirrors. These structures are promising for tunable nanophotonics applications, in particular, they can be used as magneto-optical (MO) metal-insulator-metal waveguides and modulators.

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Enhancement of Faraday effect in one-dimensional magneto-optical photonic crystal including a magnetic layer with wavelength dependent off-diagonal elements of dielectric constant tensor

Cited by 5 publications

References 21 publications

On overdamping phenomena in gyroscopic systems composed of high-loss and lossless components

On overdamping phenomena in gyroscopic systems composed of high-loss and lossless components

Angle dependence of the photonic enhancement of the magneto-optical Kerr effect in DMS layers

Tunable Optical Nanocavity of Iron-garnet with a Buried Metal Layer

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