Dr. Joel J. Martin
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. I retired in 2000 but have continued doing some research.
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 OSU Crystal Growth Laboratory.
I enjoy teaching physics at all levels. I employ "real-world" examples and demonstrations.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, Radioactivity and Nuclear Physics, Solid State, and Semiconductors.
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. I also travel some and have seen polar bears in Churchill and visited Machu Pichu.
J.J. MArtin, D.F. Croxall, M. McGovern, and A.L. Haston, "The Growth of High Quality Quartz in Heavy Water," 2002 IEEE International Frequency Control Symposium and PDA Exhibition, IEEE, pp. 345-360, 2002.
J.J. Martin and A.R. Lopez, "High-Temperature Acoustic Loss in AT-cut, BT-cut, and SC-cut Quartz Resonators," 2001 IEEE International Frequency Control Symposium and PDA Exhibition, IEEE, pp. 316-323, 2001.
J.C. King and J.J. Martin, "The Effects of Ionizing Radiation on the Vacuum-Electrolysis of Quartz," 2001 IEEE International Frequency Control Symposium and PDA Exhibition, IEEE, pp. 304-315, 2001.
J.J. Martin, "Estimation of Aluminum and Growth-defect Content in Cultured Quartz Using Infrared Absorption," Proc. of the 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).
Adam W. Wood, C.A. Hunt, and J.J. Martin, "The low-temperature photochromic and photorefractive response of bismuth germanium oxide doped with molybdenum," J. Appl. Phys. 101, 063517-1 (2007).
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).
J.S. McCullough, A.L. Harmon-Bauer, C.A. Hunt, and J.J. martin, "Persistent refractive index gratings in bismuth silicon oxide doped with chromium," J. Appl. Phys. 89, 6022 (2001).
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).
M.T. Harris, J.J. Larkin, and J.J. Martin, "Low-defect Colorless Bi12GeO20 Grown by Hydrothermal Techniques," Appl. Phys. Lett. 60 2162 (1992).