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Review of Scientific Instruments / Volume 83 / Issue 1 / ARTICLES / Optics; Atoms and Molecules; Spectroscopy; Photon Detectors

Rev. Sci. Instrum. 83, 013103 (2012); http://dx.doi.org/10.1063/1.3673638 (5 pages)

Fast magneto-optical spectrometry by spectrometer

G. X. Du, S. Saito, and M. Takahashi

Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, 6-6-05 Aoba, Aramaki, Aoba-ku, Sendai 980-8579, Japan

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(Received 28 September 2011; accepted 6 December 2011; published online 9 January 2012)

Time efficient measurement of the spectroscopic magneto-optical (MO) activity of materials has always been desirable. In conventional MO systems, the monochromator produces quasi-monochromatic light in a narrow wavelength window. Therefore, to measure the spectroscopic MO activity, a large number of measurements over the full spectra is required to obtain satisfactory wavelength resolution and thus is very time consuming. Here, we develop a novel system that is capable of fast measurement of the MO activity by only one white light source, two polarizers, one achromatic quarter-wave plate, and one spectrometer. This system is flexible from UV to IR region, only depending on the power spectra of light source and sensitivity of the detector at the corresponding wavelengths. As examples, we measured the intriguing optic and MO activity in glass, ferromagnetic thin film, and bulk GaAs in the visible to near infrared region. The results of glass demonstrated a minimum resolvable Faraday rotation angle of 0.004° by the currently equipped system.

© 2012 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. INSTRUMENTATION OF MO SPECTROMETRY
  3. DEMONSTRATION ON GLASS SHEET
  4. THIN FILM WITH PERPENDICULAR MAGNETIZATION
  5. MAGNETIC FIELD INDUCED MO IN BULK GAAS NEAR BAND EDGE

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KEYWORDS and PACS

Keywords

Faraday effect, ferromagnetism, gallium arsenide, glass, III-V semiconductors, infrared detectors, infrared spectrometers, magnetic thin films, monochromators, optical resolving power, optical retarders, optical variables measurement, ultraviolet detectors, ultraviolet spectrometers

PACS

  • 07.60.Rd

    Visible and ultraviolet spectrometers

  • 07.57.Ty

    Infrared spectrometers, auxiliary equipment, and techniques

  • 07.57.Kp

    Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors

  • 78.20.Ls

    Magneto-optical effects

  • 85.60.Gz

    Photodetectors (including infrared and CCD detectors)

  • 42.79.Ci

    Filters, zone plates, and polarizers

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3673638

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

    R. Wolfe, J. F. Dillon, R. A. Lieberman, and V. J. Fratello, Appl. Phys. Lett. 57, 960 (1990)APPLAB000057000010000960000001.

    M. Inoue, K. Arai, T. Fujii, and M. Abe, J. Appl. Phys. 85, 5768 (1999)JAPIAU000085000008005768000001.

    K. J. Chau, M. Johnson, and A. Y. Elezzabi, Phys. Rev. Lett. 98, 133901 (2007).


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