Design and fabrication of 2D fast electrothermal micromirrors with large scan range and small center shift

Sagnik Pal*, Huikai Xie

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

We report an elliptical micromirror actuated by a curved electrothermal multimorph that bends and twists upon controlled Joule heating. The mirror plate is elliptical with 92 μm major axis and 142 μm minor axis. The micromirror has an optical scan angle of 22 at 0.37 V applied voltage or 9 mW power input. Mirror-center shift produced by multimorph bending and twisting compensate each other and is only 14.5 μm at an optical scan angle of 22°. The curved actuator shape maximizes chip-area utilization and ensures a high resonant frequency. The first three resonant modes are at 3.9 kHz, 8.6 kHz and 17 kHz. Two-dimensional (2D) optical scanning is demonstrated using the second and third resonant modes.

Original languageEnglish
Title of host publication2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11
Pages2550-2553
Number of pages4
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11 - Beijing, China
Duration: 5 Jun 20119 Jun 2011

Publication series

Name2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11

Conference

Conference2011 16th International Solid-State Sensors, Actuators and Microsystems Conference, TRANSDUCERS'11
Country/TerritoryChina
CityBeijing
Period5/06/119/06/11

Keywords

  • Curved multimorph
  • electrothermal
  • micromirror

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