Kristen P Constant

  • Interim Vice President and Chief Information Officer
  • Wilkinson Professor of Interdisciplinary Engineering
  • Materials Science and Engineering

Main Office

271 Durham Center 613 Morrill Rd
Ames, IA 50011-2100
Phone: 515-294-3337
Fax: 515-294-5444


  • Ph.D. Materials Science & Engineering, Northwestern University, 1990
  • B.S. Ceramic Engineering, Iowa State University, 1986

Interest Areas

  • Photonic structures, design and fabrication
  • Energy applications of photonic structures
  • Materials Engineering Education
  • Broadening participation in STEM fields

Selected Publications

  • P. Kuang, J.-M. Park, G. Liu, Z. Ye, W. Leung, S. Chaudhary, D. Lynch, K.-M. ho, and K. Constant, “Metal-nanowall grating transparent electrodes: Achieving high optical transmittance at high incident angles with minimal diffraction,” Optics Express Vol 21 iss:2 pg 2393-401 (2013)
  • Invited review article: Zhuo Ye, Joong-Mok Park, Kristen Constant and Kai-Ming H, “Photonic Crystals for Energy Related Applications”, Journal of Photonics for Energy, Vol 2(1)  (2012)
  • Joong-Mok Park, Zhengqing Gan, Wai Y. Leung, Rui Liu, Zhuo Ye, Kristen Constant, Joseph Shinar, Ruth Shinar, and Kai-Ming Ho, “Soft holographic interference lithography microlens for enhanced organic light emitting diode light extraction,” Optics Express Vol. 19, Iss. S4, pp. A786–A792 (2011)
  • P. Kuang, J.-M. Park, W. Leung, R.C. Mahadevapuram, K.S. Nalwa, T.-G Kim, S. Chaudhary, K.-M. Ho, K. Constant, “A new architecture for transparent electrodes: Relieving the trade-off between electrical conductivity and optical transmittance”, Adv. Mater., 23, 2469-2473 (2011)
  • J.-M. Park, T.-G. Kim, K. Constant, K.-M. Ho, “Fabrication of submicron metallic grids with interference and phase-mask holography”, J. Micro/Nanolith. MEMS 10(1) (2011)
  • Y.-C. Shin, D.-H.Kim, E.-H. Kim, J.-M. Park, K. Constant, K.-M. Ho, J.-H. Choe, Q-H. Park, H.-Y. Ryu, J.-H. Baek, T. Jung, T.-G. Kim, “High efficiency GaN light-emitting diodes with two dimensional photonic crystal structures of deep-hole square lattices”, IEEE Journal of Quantum Electronics, 46 (1) p. 116-120, (2010)
  • J.-H. Lee, P. Kuang, W. Leung, Y.-S. Kim, J.-M. Park, H. Kang, K. Constant and K.-M. Ho, Semi-Crystalline Woodpile Photonic Crystals without Complicated Alignment via soft Lithography, Appl. Phys. Lett. 96(19), (2010)
  • J. M. Park, K. S. Nalwa, W. Leung, K. Constant, S. Chaudhary and K. M. Ho "Fabrication of metallic nanowires and nanoribbons using laser interference lithography and shadow lithography" Nanotechnology, 21 (21) (2010)
  • P. Kuang, J.-H. Lee, C.-H. Kim, K.-M. Ho, K. Constant, Improved surface wettability of polyurethane films by Ultraviolet Ozone treatment, Journal of Applied Polymer Science, 118 (5), 3024-3033, (2010)
  • Y.-C. Shin, D.-H.Kim, E.-H. Kim, J.-M. Park, K. Constant, K.-M. Ho, J.-H. Choe, Q-H. Park, H.-Y. Ryu, J.-H. Baek, T. Jung, T.-G. Kim, Effects of Nanometer-Scale Photonic Crystal Structures on the Light Extraction from GaN Light-Emitting Diodes," IEEE Journal of Quantum Electronics, 46 (9), (2010)