OSA's Digital Library

Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 4 — Apr. 1, 2013
  • pp: 838–842

Design and fabrication of amorphous germanium thin film-based single-material distributed Bragg reflectors operating near 2.2 μm for long wavelength applications

Jung Woo Leem and Jae Su Yu  »View Author Affiliations


JOSA B, Vol. 30, Issue 4, pp. 838-842 (2013)
http://dx.doi.org/10.1364/JOSAB.30.000838


View Full Text Article

Enhanced HTML    Acrobat PDF (795 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

We report the design and fabrication of single-material distributed Bragg reflectors (DBRs) composed of amorphous germanium (a-Ge) thin films by a glancing angle deposition and their optical reflectance characteristics in the long wavelength region of 1.7–3.1 μm, together with the aid of theoretical analysis using a rigorous coupled-wave analysis method. The refractive index of the a-Ge films is estimated from the measured transmittance spectra. The high and low refractive indices a-Ge films (i.e., Δn2.18), which compose the alternative layers of DBRs, were fabricated at two incident vapor flux angles (θα) of 0° and 80°, respectively, by determining the quarter wavelength thicknesses of 135 nm at θα=0° and 291 nm at θα=80° for a center wavelength (λc) of 2.2μm. For the fabricated a-Ge/a-Ge DBR with only 5 pairs, the normalized stop bandwidth (Δλ/λc) of 22.3% was measured while maintaining high reflectance values of >99% over a wide wavelength range of 2.06–2.55 μm, which indicates a reasonable consistency with the calculated reflectance results.

© 2013 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(230.1480) Optical devices : Bragg reflectors
(310.1860) Thin films : Deposition and fabrication
(310.4165) Thin films : Multilayer design

ToC Category:
Optical Devices

History
Original Manuscript: December 11, 2012
Revised Manuscript: February 9, 2013
Manuscript Accepted: February 11, 2013
Published: March 12, 2013

Citation
Jung Woo Leem and Jae Su Yu, "Design and fabrication of amorphous germanium thin film-based single-material distributed Bragg reflectors operating near 2.2 μm for long wavelength applications," J. Opt. Soc. Am. B 30, 838-842 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-4-838

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited