Lawrence Livermore National Laboratory

Stavros Demos

Research Staff
Materials Science Division

 +1 925-423-3388

Ph.D. Physics
City College of New York
B.S. Physics
University of Ioannina, Greece

Research Interests

Interaction of lasers with optical materials, nonradiative processes in laser materials, defects in optical materials, laser material processing, laser-induced damage in optical materials, photonic applications in medicine, subsurface imaging and lesion assessment in tissues, optical methods for in vivo tissue diagnostics.

Selected Publications

Negres, R. A., M. W. Burke, P. P. DeMange, S. B. Sutton,, M. D. Feit, and S. G. Demos, "Evaluation of UV absorption coefficient in laser-modified fused silica," Applied Physics 90, 061115 (2007).

Lieber, C., S. Urayama, N. Rahim, R. Tu, R. Saroufeem, B. Reubner, and S. Demos, "Multimodal near infrared spectral imaging as an exploratory tool for dysplastic esophageal lesion identification," Optics Express14, 2211-2219 (2006).

DeMange, P., R. A. Negres, C. W. Carr, H. B. Radousky, and S. G. Demos, "Laser-induced defect reactions governing damage initiation in DKDP crystals," Optics Express 14, 5313- 5328 (2006).

Fournier, L. S., V. Lucidi, K. Berejnoi, T. Miller, S. G. Demos, R. C. Brasch, "In‑vivo NIR autofluorescence imaging of rat mammary tumors," Optics Express 14, 6713- 6723 (2006).

Simon, G. H., H. E. Daldrup-Link, J. Kau, S. Metz, J. Schlegel, G. Piontek, O. Saborowski, S. Demos, J. Duyster, and B. J. Pichler, "Optical imaging of experimental arthritis using allogeneic leukocytes labeled with a near-infrared fluorescent probe," European Journal of Nuclear Medicine and Molecular Imaging 33 (9): 998-1006 (2006).

Negres, R., N. Zaitseva, P. DeMange, and S. G. Demos, "Expedited laser damage profiling of KDxH2-xPO4 with respect to crystal growth parameters," Optics Letters 31(21), 3110-3112 (2006).

DeMange, P., R. A. Negres, A. M. Rubenchik, H. B. Radousky, M. D. Feit, and S. G. Demos, "Understanding and predicting the damage performance of KDxH2-xPO4 crystals under simultaneous exposure to 532- and 355-nm pulses," Applied Physics Letters 89, 181922 (2006).

DeMange, P., R. A. Negres, H. B. Radousky, and S. G. Demos, "Differentiation of defect populations responsible for bulk laser-induced damage in potassium dihydrogen phosphate crystals," Optical Engineering 45, 104205 (2006).

Demos, S. G., A. J. Vogel, and A. H. Gandjbakhche, "Advances in Optical Spectroscopy and Imaging of Breast Lesions," Journal of Mammary Gland Biology and Neoplasia 11, 165-181 (2006).

DeMange, P., C. W. Carr, R. A. Negres, H. B. Radousky, and S. G. Demos, "Multi-wavelength investigation of laser-damage performance in KDP and DKDP following laser annealing," Optics Letters 30, 221-224 (2005).

Carr, C. W., M. D. Feit, H. B. Radousky, S. O. Kucheyev, M. D. Shirk, A. M. Rubenchik, and S. G. Demos, "Radiation produced by femtosecond laser-plasma interaction during dielectric breakdown," Optics Letters 30, 661-664 (2005).

A. P. Michalopoulou, J. T. Fitzgerald, C. Troppmann, and S. G. Demos, "Spectroscopic Imaging for Detection of Ischemic Injury in Rat Kidneys Using Changes in Intrinsic Optical Properties," Applied Optics 44, 2024-2032 (2005).

Negres, R. A., S. O. Kucheyev, P. DeMange, C. W. Carr, H. B. Radousky, and S. G. Demos, "Decomposition of KH2PO4 crystals during laser-induced breakdown," Applied Physics Letters 86, 171107 (2005).

Negres, R. A., P. DeMange, and S. G. Demos, "Investigation of laser annealing parameters for optimal laser-damage performance in deuterated potassium dihydrogen phosphate," Optics Letters 30, 2766-2768 (2005).

Fitzgerald, J. T., A. Michalopoulou, C. D. Pivetti , R. N. Raman, C. Troppmann, S. G. Demos, "Real-time Assessment of in vivo Renal Ischemia Using Laser Autofluorescence Imaging," Journal of Biomedical Optics 10, 044018 1-7 (2005).

Liu, C. S., C. J. Hou, N. Kioussis, S. G. Demos, and H. B. Radousky, "Electronic structure calculations of an oxygen vacancy in KH2PO4," Physical Review B 72 (13): Art. No. 134110 (2005).

Demos, S. G., C. A. Lieber, B. Lin, and R. Ramsamooj, "Imaging of Tissue Micro-Structures using a Multi-Modal Microscope Design," Journal of Selected Topics in Quantum Electronics 11, 752-758 (2005).

Demos, S. G., R. Bold, R. deVere White, and R. Ramsamooj, "Investigation of near infrared autofluorescence imaging for the detection of breast cancer," Journal of Selected Topics in Quantum Electronics 11, 791-798 (2005).

Carr, C. W., H. B. Radousky, A. M. Rubenchik, M. D. Feit, and S. G. Demos, "Localized dynamics during laser-induced damage in optical materials," Physical Review Letters 92, 087401-1 (2004).

Kucheyev, S. O., W. J. Siekhaus, T. A. Land, and S. G. Demos, "Mechanical response of KD2xH2(1-x)PO4 crystals during nanoindentation" Applied Physics Letters, 84, 2274-2276 (2004).

Demos, S. G., R. Gandour-Edwards, R. Ramsamooj, R. deVere White, "Near infrared autofluorescence imaging for detection of cancer," Journal of Biomedical Optics 9, 587-592 (2004).

Demos, S. G., R. Gandour-Edwards, R. Ramsamooj, and R. deVere White, "Spectroscopic detection of bladder cancer using near infrared imaging techniques," Journal of Biomedical Optics 9, 767-771 (2004).

DeMange, P., C. W. Carr, H. B. Radousky, and S. G. Demos, "System for evaluation of laser-induced damage performance of optical materials for large aperture lasers," Review of Scientific Instruments 75, 3298-3301 (2004).

Walser, A. D., S. G. Demos, M. Etienne, and R. Dorsinville, "Nonlinear optical absorption in laser modified regions of fused silica substrates," Optics Communications 240, 417-421 (2004).

Fitzgerald, J. T., S. G. Demos, A. Michalopoulou, J. L. Pierce, and C. Troppmann. "Assessment of renal ischemia by optical spectroscopy," Journal of Surgical Research 122, 21-28 (2004).

Kucheyev, S. O., C. Bostedt, T. van Buuren, T. M. Willey, T. A. Land, L., J. Terminello, T. E. Felter, A. V. Hamza, S. G. Demos, and A. J. Nelson "Electronic structure of KD2xH2(1-x)PO4 studied by soft x-ray absorption and emission spectroscopies," Physical Review B 70, art. no. 245106 (2004).

Gallagher, R. R., S. G. Demos, M. Balooch, G. W. Marshall, Jr., and S. J. Marshall, "Optical Spectroscopy and Imaging of the Dento-Enamel Junction in Human Third Molars," Journal of Biomedical Materials Research 64A, 372-377 (2003).

Kucheyev, S. O., and S. G. Demos, "Optical Defects Produced in Fused Silica during Laser-Induced Breakdown," Applied Physics Letters 82, 3230 (2003).

Demos, S. G., M. Staggs, and H. B. Radousky, "Investigation of Bulk Defect Formations in KH2PO4 Crystals Using Fluorescence Microscopy," Physical Review B 67, 224102 (2003).

Liu, C. S., N. Kioussis, S. G. Demos, and H. B. Radousky, "Electron- and Hole-Assisted Reactions of H Defects in Hydrogen-Bonded KDP," Physical Review Letters 91, 015505/1-4 (2003).

Liu, C., Q. Zhang, N. Kioussis, S. G. Demos, and H. B. Radousky, "Ab Initio Electronic Structure Calculations of Hydrogen Point Defects in KH2PO4," Phys. Rev. B 68, art. no. 224107 (2003).

Carr, C. W., H. B. Radousky, and S. G. Demos, "The Wavelength Dependence of Laser Induced Damage: Determining the Damage Initiation Mechanisms," Physical Review Letters 91, 127402 (2003).

Chirila, M. M., N. Y. Garces, L. E. Halliburton, S. G. Demos, T. A. Land, and H. B. Radousky, "Production and Thermal Decay of Radiation-Induced Point Defects in KD2PO4 Crystals," Journal of Applied Physics, 94 6456-62 (2003).

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