Applied Physics A

, 122:538 | Cite as

Narrowband optical thin-film filters with distributed cavity modes

  • Muhammad Taimoor
  • Sabrina Reuter
  • Hartmut Hillmer
  • Thomas Kusserow
Article

Abstract

This paper presents a narrowband optical thin-film filter based on a multiple-layer stack with layer thicknesses varying in the direction of light propagation (termed as chirping). By chirping, we distribute the cavity of a Fabry–Pérot resonator over several periods, causing a wider spatial distribution of the electric field of the resonant modes. Better control of the mode distribution may improve the performance of VCSEL devices. These chirped filters are investigated by theoretical model calculations with respect to important optical design parameters such as chirp functions, chirp distribution, chirp volume, total number of periods and the refractive index contrast. Additionally, the chirped filters are fabricated and their optical characterization results are compared with the numerical investigations.

Notes

Acknowledgments

The authors would like to thank A. Dück, J. Krumpholz, D. Gutermuth, F. Messow and H. Wilke for their scientific and technical support.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Muhammad Taimoor
    • 1
  • Sabrina Reuter
    • 1
  • Hartmut Hillmer
    • 1
  • Thomas Kusserow
    • 1
  1. 1.Institute of Nanostructure Technologies and Analytics/CINSaTUniversity of KasselKasselGermany

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