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Assistant Professor of Physics

Mail: 525 Northwestern Ave, Dept. of Physics, Purdue University, West Lafayette IN 47907
Office: PHYS 170 Telephone: 765 494 3039
Lab: PHYS 42
E-mail: Fax: 765-494-0706

Research Group Website
M.S. in Physics, University of Bucharest, Bucharest, Romania, 1993
Ph.D. in Physics, Boston University, 1999

Research Areas:

  • condensed matter physics (experimental)
  • optical physics (experimental)
  • nanoscience and nanotechnology

Research Interests:

Our group is studying the structural and optical properties of nanostructured materials. In particular we are exploring the properties of complex semiconductor nanostructures for infrared light emission and detection. We are also investigating the fundamental properties of phase transformations in metallic nanoparticles.Our work involves material design, synthesis and characterization, as well as device processing and testing. We have considerable expertise with:

  • Fourier Transform Infrared Spectroscopy
  • Synchrotron-based x-rays scattering techniques
  • Molecular beam epitaxy growth of III-V semiconductors

Professional Experience:

01/09-Present Assistant Professor in Physics
Purdue University, West Lafayette, IN

09/06-Present Assistant Professor in Physics
State University of New York at Binghamton, Physics Department, Binghamton, NY

04/03-08/06 Research Scientist
Bell Laboratories, Lucent Technologies, Murray Hill, NJ

09/01-03/03 Product Development Engineer
IQE, Inc., Bethlehem, PA

9/99-09/01 Postdoctoral Associate
School of Applied and Engineering Physics, Cornell University, Ithaca, NY

Professional Memberships:

  • American Physical Society (APS)
  • Institute of Electrical and Electronic Engineers (IEEE)
  • Materials Research Society (MRS)

Selected Recent Publications

  1. R. Steed, M. Matthews, J. Plumridge, M. Frogley, C. Phillips, Z. Ikonic, P. Harrison, O. Malis, L. N. Pfeiffer, and K. W. West, “ Saturation of intersubband transitions in p-doped GaAs/AlGaAs quantum wells”, Applied Physics Letters 92 (2008), 183104.
  2. J. Chen, O. Malis, A. M. Sergent, D. L. Sivco, N. Weimann, and A. Y. Cho, “In0.68Ga0.32As/Al0.64In0.36As/InP 4.5  µm quantum cascade lasers grown by solid phosphorus molecular beam epitaxy”, Journal of Vacuum Science and Technology 25 (2007), 913.
  3. M. Okano, S. Liu, T. Ihara, H. Itoh, M. Yoshita, H. Akiyama, L. N. Pfeiffer, K. West, and O. Malis, “Temperature-dependent current injection and lasing in T-shaped quantum-wire laser diodes with perpendicular p- and n-doping layers”, Applied Physics Letters 90 (2007), 091108.
  4. C. Gmachl, O. Malis, and A. Belyanin, “Optical nonlinearities in intersubband transitions and quantum cascade lasers”, in “Intersubband transitions in quantum structures” edited by Roberto Paiella, pp. 181, (McGraw-Hill, 2006).
  5. O. Malis, D.L. Sivco, J. Chen, L. Zhang, A. M. Sergent, Z. Liu, and C. Gmachl, “Optimization of InP-based waveguides for high-performance mid-infrared quantum cascade lasers”, proceeding of the Conference on the Physics of Semiconductors, Vienna, Austria (2006).
  6. O. Malis, A. M. Sergent, J. Chen, D.L. Sivco, L. Zhang, Z. Liu, and C. Gmachl, “Material design and integration for high power quantum cascade lasers”, proceedings of the Indium Phosphide and related materials conference, Princeton, NJ (2006).
  7. O. Malis, L.N. Pfeiffer, K.W. West, A.M. Sergent, and C. Gmachl, “Mid-infrared hole-intersubband electroluminescence in carbon-doped GaAs/AlGaAs quantum cascade structures”, Applied Physics Letters 88 (2006), 081117.

Current Research Funding:

  • National Science Foundation
  • Research Corporation

Positions Open:

Highly motivated undergraduate and graduate students are welcome to contact me about research opportunities in our Infrared Nanostructured Devices Lab.