Optical surface states in magnetophotonic crystals

Oct 26, 2010 By Adarsh Sandhu
Dr Baryshev and Fig.1. (a) SEM image of a magnetophotonic crystal, the system of two adjoining multilayers. (b) Sketch of the spatial distribution of dielectric constants and the in-sample distribution of the electric field amplitude for the resonant wavelength. (c), (d) Experimental (circles) and calculated (gray solid line) spectra of the magnetophotonic crystal. Faraday rotation of the garnet/SiO2 multilayer, the reference sample, is shown by black solid line in plot (d). Copyright : Toyohashi University of Technology

Using state of the art microfabrication technology to create periodic structures with high accuracy, Dr Baryshev and colleagues at the Toyohashi University of Technology, Japan, report the existence of so-called optical surface (Tamm) states at the interfaces of magnetophotonic crystals.

Magnetophotonic are artificial media that provide efficient coupling of light to their magnetic constituents. Light confinement inside magnetophotonic crystals results in a large enhancement of their magneto-optical response, which is a promising property for optical applications such as isolators, circulators and modulators.

Here, using state of the art microfabrication technology to create periodic structures with high accuracy, Alexander Baryshev and colleagues at Electronics-Inspired Interdisciplinary Research Institute (EIIRIS) report the existence of so-called optical surface (Tamm) states at the interfaces of magnetophotonic crystals.

Structures with different designs were fabricated by sputtering where the periodicity of magnetophotonic crystals was terminated by another medium: a material with a negative permittivity or a .

The researchers demonstrated that the tailoring interfaces of magnetophotonic crystals can produce conditions for the existence of Tamm states, where the manifestation of the states was seen as resonant peaks in transmission and Faraday rotation spectra of the crystals.

This novel media shows potential for magnetotunable filters and localizing within any active material used as the constituent layers of photonic structures.

Explore further: NIST seeks calibration methodologies for determining the accuracy of micro-flows

More information: Tailoring surfaces of one-dimensional magnetophotonic crystals: Optical Tamm state and Faraday rotation, Physical Review B 79, 125103 (2009) DOI:10.1103/PhysRevB.79.125103

Related Stories

Fabricating 3D Photonic Crystals

Jan 21, 2009

(PhysOrg.com) -- “In photonic crystals, the ability to control the structure of a material in full three dimensional space, allows you to control the way that light flows through it,” John Rogers tells PhysOrg.com. “Thi ...

Georgia Tech to Create Photonic Crystal Tools

Sep 09, 2005

Photonic crystals, with highly periodic structures that can be designed to control light, have the potential to revolutionize everything from computing to communications. But researchers need more effective and affordable ...

Recommended for you

Researchers prove magnetism can control heat, sound

6 hours ago

Phonons—the elemental particles that transmit both heat and sound—have magnetic properties, according to a landmark study supported by Ohio Supercomputer Center (OSC) services and recently published by ...

How researchers listen for gravitational waves

15 hours ago

A century ago, Albert Einstein postulated the existence of gravitational waves in his General Theory of Relativity. But until now, these distortions of space-time have remained stubbornly hidden from direct ...

What's fair?: New theory on income inequality

May 27, 2015

The increasing inequality in income and wealth in recent years, together with excessive pay packages of CEOs in the U.S. and abroad, is of growing concern, especially to policy makers. Income inequality was ...

Scientists one step closer to mimicking gamma-ray bursts

May 27, 2015

Using ever more energetic lasers, Lawrence Livermore researchers have produced a record high number of electron-positron pairs, opening exciting opportunities to study extreme astrophysical processes, such ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.