Yongfeng Lu

Avatar for Yongfeng Lu

Yongfeng Lu

Professor Electrical & Computer Engineering University of Nebraska-Lincoln

Contact

Address
SEC C290H
Lincoln, NE 68588-0511
Phone
402-472-3771 On-campus 2-3771
Email
ylu2@unl.edu
Social Media

Dr. Lu obtained his B.Eng. degree in 1984 from Tsinghua University, Beijing, China. He received his M.Eng. and Ph.D. degrees from Osaka University, Japan, in 1988 and 1991, respectively. Upon graduation from Osaka University, he joined the Department of Electrical Engineering at the National University of Singapore, where he served in various positions. He joined the Department of Electrical Engineering at the University of Nebraska-Lincoln in September 2002.

Dr. Lu has an extensive research background in the areas of laser-based microscale and nanoscale material processing. He has written over 220 peer-reviewed journal publications and over 160 presentations for international conferences. He has also received a number of national and international awards, including the National Technology Award (Singapore, 1998), Asean Engineering Achievement Award (Asean Engineering Association, 1999), and Laser International Award (Germany, 2000).

Dr. Lu has led the research group that pioneered laser removal of nanoparticles from solid surfaces (commonly known as laser cleaning) and nanoscale patterning by optical resonance in microparticles. He was among the first researchers to theoretically propose a model to explain the behaviors of nanoparticles on a solid surface under laser irradiation and to experimentally obtain subwavelength nanostructures using laser-induced optical resonance in nanospheres. His work encompasses a few important topics including laser writing of subwavelength structures, applications of laser removal of nanoparticles, behaviors of nanoparticles under laser irradiation, theoretical modeling, influence of laser wavelength, and particle removal with assistance of thin liquid films. He has also closely worked with industries and developed a few commercial products for laser etching, laser cleaning, laser cutting and laser surface texturing.

Education

  • Ph.D., Osaka University, Japan, 1991
  • M.Eng., Osaka University, Japan, 1988
  • B.Eng., Tsinghua University, Beijing, China, 1984

Projects

  • Multi-energy Processing for Novel Coating Technologies
  • Novel Supercapacitors Based on Nano-Structured Materials
  • Fast Growth of Large Diamond Crystals in Open Air
  • Low-Temperature Epitaxy of Gallium Nitride Thin Films
  • Synthesis of Crystalline Carbon Nitride by Simultaneous Vibrational and Electronic Excitations
  • Laser Manufacturing of Three-Dimensional Lightwave Circuits and Nano-Optical Devices
  • Coating and Patterning Diamond Films by Laser Resonant Bond Breaking in Polymer Precursors
  • MRI: Development of Multifunctional CARS (Coherent Anti-Stokes Raman Spectroscopy) Imaging System

Research and Professional Interests

  • Carbon materials: diamond, carbon nanotubes, carbon nano-onions, graphene, etc.
  • Nanophotonics
  • Optical spectroscopy and imaging: Confocal Raman spectroscopy and imaging, surface enhanced Raman spectroscopy, laser-induced breakdown spectroscopy, coherent anti-Stocks Raman spectroscopy and imaging
  • Nanoscale laser material processing and characterization
  • Laser-assisted nanoimprinting
  • 2D and 3D nanomanufacturing employing a scanning probe microscope
  • Surface cleaning and drying
  • Laser-assisted materials synthesis and processing
  • Molecular Level Surface Drying for Nanoelectronics
  • Controlled growth of carbon nanostructures, including carbon nanotubes (CNT), graphene, and carbon nanoonions (CNOs)
  • Supercapacitors
  • Nano-Raman spectroscopy
  • Two-photon polymerization for 3D nanofabrication
  • Pulsed laser deposition
  • Laser-assisted chemical vapor deposition

Honors and Awards

  • National Technology Award (National Science and Technology Board, Singapore, 1998).
  • International Laser Award (Berthold Leibinger Innovationspreis, Berthold Leibinger Stiftung, Germany, 2000).
  • General Chair, International Congress on Applications of Lasers & Electro-Optics 2007 (ICALEO, October 29-November 1, 2007, Orlando, FL)
  • Board Member, Laser Institute of America (2008-Present)
  • SPIE Fellow (2008-Present)

Selected Publications

  1. J. B. Park, W. Xiong, Z. Q. Xie, Y. Gao, M. Qian, M. Mitchell, M. Mahjouri-Samani, Y. S. Zhou, L. Jiang, and Y. F. Lu, “Transparent interconnections formed by rapid single-step fabrication of graphene patterns”, Appl. Phys. Lett. 99, 053103 (2011) 2
  2. Y. Gao, Y. S. Zhou, M Qian, Z. Q. Xie, W. Xiong, H.F. Luo, L. Jiang, and Y. F. Lu, "Fast growth of branched nickel monosilicide nanowires by laser-assisted chemical vapor deposition", Nanotechnology, 22, 235602 (2011)
  3. M. Qian, Y. S. Zhou, Y. Gao, J. B. Park, T. Feng, S. M. Huang, Z. Sun, L. Jiang, and Y. F. Lu, “Formation of graphene sheets through laser exfoliation of highly ordered pyrolytic graphite”, Appl. Phys. Lett., 98, 173108 (2011)
  4. L. B. Guo, W. Hu, B. Y. Zhang, X. N. He, C. M. Li, Y. S. Zhou, Z. X. Cai, X. Y. Zeng, and Y. F. Lu, “Enhancement of optical emission from laser-induced plasmas by combined spatial and magnetic confinement”, Opt. Express 19, 14067-14075. (2011)
  5. A. Veillère, T. Guillemet, Z. Q. Xie, C. A. Zuhlke, D. R. Alexander, J. F. Silvain, J. M. Heintz, N. Chandra, and Y. F. Lu, “Influence of WC-Co substrate pretreatment on diamond film deposition by laser-assisted combustion synthesis”, Appl. Mater. and Interfaces 3, 1134-1139 (2011)
  6. X. N. He, W. Hu, C. M. Li, L. B. Guo, Y. F. Lu, “Generation of high-temperature and low-density plasmas for improved spectral resolutions in laser-induced breakdown spectroscopy”, Opt. Express 19, 10997-11006 (2011)
  7. J. B. Park, W. Xiong, Y. Gao, M. Qian, Z. Q. Xie, M. Mitchell, Y. S. Zhou, L. Jiang, and Y. F. Lu, “Fast growth of graphene patterns by laser direct writing”, Appl. Phys. Lett. 98, 123109 (2011).
  8. L. B. Guo, C. M. Li, W. Hu, Y. S. Zhou, B. Y. Zhang, Z. X. Cai, X. Y. Zeng, and Y. F. Lu, “Plasma confinement by hemispherical cavity in laser-induced breakdown spectroscopy”, Appl. Phys. Lett. 98, 131501 (2011).
  9. Z. Q. Xie, X. N. He, W. Hu, T. Guillemet, J. B. Park, Y. S. Zhou, J. Bai, Y. Gao, X.C. Zeng, L. Jiang, and Y.F. Lu, “Excitations of precursor molecules by different laser powers in laser-assisted growth of diamond films”, Crystal Growth & Design 10, 4928–4933 (2010).
  10. X. N. He, X. K. Shen, T. Gebre, Z. Q. Xie, L. Jiang, and Y. F. Lu, “Spectroscopic Determination of Rotational Temperature in C2H4/C2H2/O2 Flames for Diamond Growth with and without Tunable CO2 Laser Excitation”, App. Opt., 49(9), 1555-1562 (2010).