Fabrication and measurement of low-stress membrane mirrors for adaptive optics

Peter Kurczynski, Harold M. Dyson, Bernard Sadoulet, J. Eric Bower, Warren Y.C. Lai, William M. Mansfield, J. Ashley Taylor

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We have fabricated low-stress membranes from single-crystal silicon for use as deformable mirrors in adaptive optics. These membranes have lower stress than membranes made from silicon nitride or other materials and therefore are capable of greater deformation than previously used membrane mirrors. Membranes were assembled into devices by flip chip bonding to electrode chips with either 256 or 1024 electrodes. We have characterized devices with static and dynamic tests and compared their performance with an analytical model. We tracked the evolution of strain in the membrane during the device's fabrication and assembly and identified sources of stress and strain in this process. We identified boron dopant concentration as a critical determinant of intrinsic stress in the membrane.

Original languageEnglish (US)
Pages (from-to)3573-3580
Number of pages8
JournalApplied Optics
Volume43
Issue number18
DOIs
StatePublished - Jun 20 2004

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering

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