title: Tuning the resonance frequencies and mode shapes in a large range multi-degree of freedom micromirror.
abstract: The ability to actively shift the primary resonance of a 2D scanning micromirror allows the user to set the scanning direction, set the scanning frequency, and lift otherwise degenerate modes in a symmetrically designed system. In most cases, resonant scanning micromirrors require frequency stability in order to perform imaging and projection functions properly. This paper suggests a method to tune the tip and tilt resonant frequencies in real time while actively suppressing or allowing degeneracy of the two modes in a symmetric electrothermal micromirror. We show resonant frequency tuning with a range of degeneracy separation of 470 Hz or by approximately ±15% and controllable coupling.
authors.forename: Jessica
authors.initials: J
authors.lastname: Morrison
authors.forename: Matthias
authors.initials: M
authors.lastname: Imboden
authors.forename: David J
authors.initials: DJ
authors.lastname: Bishop