Dr. Hong Luo

Photo of Associate Professor Hong Luo  

Professor, Department Chair, Ph.D. Purdue (1988)

Office: 126 Fronczak Hall,  (716) 645-2539
Lab: 140, 149 Fronczak Hall,  (716) 645-6475
Email: luo@buffalo.edu
link to personal website for more info

Education

  Ph.D. -- Purdue University (1988)
M.S. -- Purdue University (1984)
B.S. -- Nankai University (1982)

Research Interests

 
  • Spin-related effects and devices with semiconductors and hybrid materials
  • Fabrication of nanoelectronic and photonic materials and structures
  • Imaging and spectroscopy (electronic and magnetic) studies of nanostructures

  Since bulk semiconductors have been extensively studied and used for electronic devices, most of the new properties and applications come from man-made structures; that is, superlattices, quantum wells (two-dimensional), quantum wires (one-dimensional), and quantum dots (zero-dimensional). To further improve the functionality of electronic/photonic devices, hybridization of materials involving ferromagnetic materials, semiconductors and molecular materials is of great interest. The lab is equipped with three molecular beam epitaxy growth chambers, two of which (Riber 32 P) are connected under vacuum for fabricating III-V semiconductor/ferromagnetic hybrid and hetero structures and devices. Another major setup in the lab is an Omicron UHV/variable temperature scanning probe microscope, which can be operated in the modes of scanning tunneling microscopy (STM), with or without spin polarization, atomic force microscopy (AFM)/magnetic force microscopy (MFM), as well as spectroscopy with a temperature range from 20 K to 1500 K. The lab also shares an electron beam lithography system for creating nanostructures. We are interested in the fabrication of low-dimensional semiconductor structures and their electrical, optical, and magnetic properties. The magnetic properties are studied with MFM, a superconducting quantum interference device (SQUID), and magnetooptics (in collaboration with Profs. B.D. McCombe and A. Petrou). Our goal is to understand the fundamental properties of such structures and their application potential.

Selected Publications

  1. "Electric field control of ferromagnetism in GaSb/Mn digital alloys", G.B., Kim, M. Cheon, S. Wang, H. Luo, B.D. McCombe, X. Liu, Y. Sasaki, T. Wojowicz and J.K. Furdyna, Physica E 20, 355 (2004).
  2. "Local environment surrounding ferromagnetically ordered Mn in Mn/GaAs digital alloys and (Mn, Ga)As random alloys", Y. L. Soo, G. Kioseoglou, S. Kim, X. Chen, H. Luo, Y. H. Kao, H.-J. Lin, H. H. Hsieh, T. Y. Hou, C. T. Chen, Y. Sasaki, X. Liu, and J. K. Furdyna, Phys. Rev. B 67, 214401 (2003).
  3. "Observation of above room temperature ferromagnetism in GaSb/Mn digital alloys", X. Chen, M. Na, M. Cheon, S. Wang, H. Luo, B. McCombe, Y. Sasaki, X. Liu, J.K. Furdyna, and P. Schiffer, Appl. Phys. Lett. 81, 511 (2002).
  4. "Optical properties and optoelectronic applications of II-VI semiconductor heterostructures", H. Luo and A. Petrou, Chapter 2, Handbook of Photonics, Gupta ed. (CRC Press LLC, 1997) p. 24.