Sagnik's Home

 Figure 1: Comprehensive model schematic of an electrothermal micromirror

• Thermal modeling
• Finite element model
• Numerical reduced order model
• Parametric lumped element model
• Distributed model that draws upon similarities between heat flow and signal flow in a transmission line
  
• Mechanical model
• Newtonian approach
• Lagrangian approach
  
• Comprehensive model implementation
  
• SIMULINK
• SPICE
  

 Accomplishments

• Efficient reduced order thermal model for 1D electrothermal micromirror
• Transmission-line thermal model for electrothermal micromirrors
  
• Linear scanning of 1D micromirrors by using a special waveform
• Optimization of thermal bimorph actuator for 2D micromirrors
  
• Design of Large-Vertical-Displacement mirrors with purely vertical and purely rotational resonant modes
  

Journal Papers:

• S. Pal, H. Xie, "Pre-shaped Open Loop Drive of Electrothermal Micromirror by Continuous and Pulse Width Modulated Waveforms," IEEE Journal of Quantum Electronics, In Press, 2010.
• S. Pal, H. Xie, “Distributed and lumped element models for a bimorph-actuated micromirror,” Journal of Micromechanics and Microengineering, Vol. 20 (2010) 045020.
• S. Pal, H. Xie, “Parametric dynamic compact thermal model of an electrothermally actuated micromirror,” Journal of Micromechanics and Microengineering, Vol. 19, 065007 (2009).
• K. Jia, S. Pal, H. Xie, “An electrothermal tip-tilt-piston micromirror based on folded dual s-shaped bimorphs,” Journal of Microelectromechanical Systems, vol. 18, pp. 1004-1015 (2009).

Conference Papers:

• S. Pal, H. Xie, “Dynamic Compact Thermal Model of an Electrothermal Micromirror Based on Transmission Line Theory,” Microtech Conference and Expo, Anaheim, CA, USA, June 21-24, 2010.
• S. Pal, H. Xie, “Maximization of Constant Velocity Scan Range of Electrothermally-Actuated Micromirror by Pulse Width Modulated Drive,” Proc. of the 2009 IEEE/LEOS International Conference of Optical MEMS & Nanophotonics, Clearwater Beach, FL, Aug. 17-20, 2009.
• K. Jia, L. Wu, S. Pal, D. Hamilton, H. Xie, “Dental Optical Coherence Tomography Employing Miniaturized MEMS-based Imaging Probe,” Proc. of the 2009 IEEE/LEOS International Conference of Optical MEMS & Nanophotonics, Clearwater Beach, FL, Aug. 17-20, 2009.
• K. Jia, S. Pal and H. Xie, "An Agile Tip-Tilt-Piston Micromirror With Large Aperture, Large Scanning Range and Low Driving Voltage", Accepted for Hilton Head, June 2008.
• S. Pal, K. Jia, S. Maley, and H. Xie, “Reduced order thermal modeling of a one-dimensional electrothermally actuated micromirror device,” to be presented at the SPIE Photonics West Conference, San Jose, CA, 19-24, January, 2008.
• X. Feng, A. Jain, S. Pal, T. Nishida, H. Xie, “LVD micromirror for rapid reference scanning in optical coherence tomography,” Proceedings of the SPIE Photonics West 2007, Jan. 20-25, 2007,  San Jose, CA.