Clive Perry Emeritus Professor PhD University of London, 1960 (617)373-2913 c.perry@neu.edu

Research Summary:

Professor Perry's group primarily studies the optical properties of solids, which include such diverse materials as semiconductor heterostructures, metals, insulators, and bio-molecular systems. Phenomena of interest cover phase transitions, localization, superconductivity, elementary excitations (e.g. electronic, magnons, plasmons, and phonons) and non-linear dynamics. The interaction of photons with solids is used as a probe of single particle and many body collective effects.

The group uses a broad range of experimental techniques which include absorption, reflection, excitation, photoluminescence, modulation, and Raman spectroscopy: Spectroscopic instrumentation covers the ultra-violet, visible, infrared, and far infrared regions of the electromagnetic spectrum. Ultra-high magnetic fields (up to 32 tesla) are utilized at the National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL. An optics program operated as a 'user facility' under the direction of Prof. Perry is in full operation at the Pulsed High Magnetic Field Facility, Los Alamos National Laboratory, Los Alamos, NM. This program supports post-docs. and graduate students at LANL engaged in photoluminescence spectroscopy, time resolved measurements using fast-pulse lasers, and surface magnetization optical Kerr effect (SMOKE) studies in pulsed magnetic fields up to 60 tesla. Participation in the new 100 tesla (1 million gauss) project scheduled for 1999 is in the planning stage.

Recent Publications :

1. "Electron-hole separation Studies of the n =1 Quantum Hall State in Modulation-Doped GaAs/AlGaAs Single Heterojunctions in High Magnetic Fields" Y. Kim, F.M. Munteanu, C.H. Perry, D.G. Rickel, J.A. Simmons, J.L. Reno, L.N. Pfeiffer, and K.W. West , Phys. Rev. B64, 195302, (2001).

2. "Bright and dark triplet states of the negatively charged magneto-excitons revealed in photoluminescence and time-resolved measurements," F.M. Munteanu, D.G. Rickel, C.H. Perry, Yongmin Kim, J.A. Simmons,and J.L. Reno, Phys. Rev. B 62, 16835, (2000).

3. "Polarization dependent red-shifts in spin-wave formation at n=1 and n=2 in a GaAs/AlGaAs parabolic quantum well in high magnetic fields," F.M. Munteanu, Y. Kim, C.H. Perry, D. Heiman, D.G. Rickel, M. Sundaram and A.C. Gossard, Phys. Rev. B62, 4249 (2000).

4. "Magnetic field induced charged exciton studies in a GaAs/AlGaAs single heterojunction", Y. Kim, F.M. Munteanu, C.H. Perry, D.G. Rickel, J.A. Simmons and J.L Reno, Phys. Rev. B 61, 4492 (2000).

5. "Crossing behavior of the singlet and triplet state of the negatively charged magneto-exciton in a GaAs/AlGaAs quantum well", F.M. Munteanu, Y. Kim, C.H. Perry, D.G. Rickel, J.A. Simmons and J.L Reno, Phys. Rev. B 61, 4731 (2000).

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