Enhancement of bandwidth in a chirped quarter-wave dielectric mirror

C. J. Wu, B. H. Chu, M. T. Weng, H. L. Lee

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Based on the quarter-wave dielectric mirror (Bragg reflector), a chirp scheme to enhance the bandwidth is proposed. We model the chirped mirror by successively cascading a number of sub-Bragg reflectors in which the optical lengths of the two constituent dielectric layers in each sub-Bragg reflector are varied in a linear chirp manner. With the change in the chirp parameter, it is seen that the reflection bandwidth is pronouncedly enlarged due to the shift in the bandedges. In addition, a broader bandwidth can be obtained when a different chirp arrangement of structure is designed. Investigation of angle-dependent reflectance for the TE wave is also given.

Original languageEnglish
Pages (from-to)437-447
Number of pages11
JournalJournal of Electromagnetic Waves and Applications
Volume23
Issue number4
DOIs
Publication statusPublished - 2009 Feb 1

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Bragg reflectors
chirp
Mirrors
mirrors
bandwidth
Bandwidth
augmentation
reflectance
shift

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

Cite this

Enhancement of bandwidth in a chirped quarter-wave dielectric mirror. / Wu, C. J.; Chu, B. H.; Weng, M. T.; Lee, H. L.

In: Journal of Electromagnetic Waves and Applications, Vol. 23, No. 4, 01.02.2009, p. 437-447.

Research output: Contribution to journalArticle

Wu, C. J. ; Chu, B. H. ; Weng, M. T. ; Lee, H. L. / Enhancement of bandwidth in a chirped quarter-wave dielectric mirror. In: Journal of Electromagnetic Waves and Applications. 2009 ; Vol. 23, No. 4. pp. 437-447.
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