Joel J. Martin, Professor Emeritus
Oklahoma State University, Department of Physics, Stillwater, OK 74078-3072
Tel: 405-744-5799 | Fax: 405-744-6811
Experience
My B.S. and M.S. degrees in Physics are from the South Dakota School of Mines and Technology and my Ph.D. in Physics is from Iowa State University. I was an AEC Post Doctoral Fellow in the Ames Laboratory at Iowa State. I have been at OSU since 1969. A one semester sabbatical was spent at Sandia National Laboratory in Albuquerque and, more recently, an academic year sabbatical as an AFOSR URRP Fellow at Rome Laboratory, Hanscom AFB, MA.
Research Interests
Experimental Solid State. Having started in transport properties of metals and semiconductors at Iowa State I soon saw the error of my ways and moved into Defective Physics. That is: I am interested in the way defects alter the properties of materials and in using defects to "tailor" the material for a specific application. At the present time I am working in two somewhat related areas; these are: (1) Quartz is the material of choice for precision frequency control and is becoming important for a number of transducers and sensors. The performance of the device is often limited by defects in the quartz crystal. Aluminum and OH-containing-growth-defects in the quartz crystal often limit the performance of the device. Low-temperature FTIR measurements are being used to measure OH and aluminum content of quartz. Irradiation and electrodiffusion (sweeping) are used to modify these defects. Acoustic loss (Q-1) and frequency versus temperature measurements as functions of sample treatment (irradiation/electrodiffusion) are used to correlate the effect of various defects with the performance of real crystals. (2) The sillenite family of photorefractive crystals have potential for optical signal processing and holographic storage. The response of BSO and the other sillenites is controlled by native defects. We are trying to understand the role these defects play and how to tailor the material for specific applications. Four-wave-mixing as a function of temperature, photo-induced optical absorption, and photoconductivity techniques are used to study these materials. For instance, my grad. student, Jeff McCullough, has found that doping BGO with chromium leads to room-temperature persistent gratings. The papers listed below describe some of this work. I am also in charge of the Oklahoma State University Crystal Growth Laboratory. And having a need to produce defects in crystals I look after our 2 MeV electron Van de Graaff accelerator.
Teaching
I enjoy teaching physics at all levels. I employ "real-world" examples and demonstrations. I am currently teaching the graduate Solid State class and will be "leading-the-team" in the Semiconductor class. I have taught: both calc. and non-calc. Based Gen. Physics, Descriptive Physics, Electronics, Heat, Mechanics, Modern for Engineers, Stat. Thermo and Kinetic Theory, Junior Lab, and Radioactivity and Nuclear Physics.
Other Interests
When I'm not twanging a quartz crystal I can often be found out on the lake trying to catch a fish. I occasionally go hunting, try my hand at photography and hold ham radio license W5RNI.
Quartz Papers
J. J. Martin, "Acoustic Loss in Cultured Quartz," Proc. of the 1995 IEEE Frequency Control Symposium, IEEE, pp. 170-178, 1996
J. J. Martin, "Estimation of Aluminum and Growth-defect Content in Cultured Quartz Using Infrared Absorption," Proc. of the 1995 IEEE Frequency Control Symposium, pp. 126-130, 1996.
J. J. Martin, "Radiation-Induced Frequency Offsets and Acoustic Loss in AT- cut Quartz Crystals," J. Appl. Phys., 68, 5095 (1990).
J. J. Martin, "Electrodiffusion or Sweeping of Ions in Quartz - A Review," IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 35, 288 (1988).
Photorefractive Papers
J. S. McCullough, Angela Harmon, J. J. Martin, M. T. Harris, and J. J. Larkin, "Low-temperature photochromic response of phosphorus-doped bismuth silicon oxide, J. Appl. Phys. 78 2010 (1995).
John J. Larkin, Meckie T. Harris, and J. J. Martin, "Growth of "Tailored" Sillenite Photorefractives for Optical Correlation," SPIE Proceedings, Photonic Device Engineering for Dual-Use Applications, Vol 2481, in press, (1995).
D. W. Hart, C. A. Hunt, D. D. Hunt, J. J. Martin, M. T. Harris, and J. J. Larkin, "The Low-temperature Photochromic Response of Bismuth Silicon Oxide," J. Appl. Phys. 73, 1443 (1993).
I. Foldvari, J. J. Martin, C. A. Hunt, R. C. Powell, R. J. Reeves, and A. Peter, "Temperature Dependence of the Photorefractive Effect in Undoped Bi12GeO20," J. Appl. Phys., 74,783 (1993).
M. T. Harris, J. J. Larkin, and J. J. Martin, "Low-defect Colorless Bi12GeO20 Grown by Hydrothermal Techniques," Appl. Phys. Lett. 60 2162 (1992).