Characterization of mid-infrared single mode fibers as modal filters (2008)
Ksendzov, A., Lay, O., Martin, S., Sanghera, J. S., Busse, L. E., Kim, W. H., ...
We present a technique for measuring the modal filtering ability of single mode fibers. The ideal modal filter rejects all input field components that have no overlap with the fundamental mode of the...
Generosi, J, Margaritondo, G, Sanghera, J S, Aggarwal, I D, Tolk, N H, Piston, D W, ...
Lipid membranes were studied by infrared scanning near-field optical microscopy at several wavelengths and by x-ray reflectivity. Together with the x-ray data, the optical images indicate the...
Sputtered films of Er3+ doped gallium sulphide glass (2006)
Frantz, J.A., Sanghera, J.S., Shaw, L.B., Villalobos, G., Aggarwal, I.D., Hewak, D.W.
Thin films of Er3+-doped gallium lanthanum sulfide (GLS) glass were prepared by RF magnetron sputtering onto fused silica and BK7 glass substrates. The films were characterized by use of SEM imaging,...
Spectroscopic infrared scanning near-field optical microscopy (IR-SNOM) (2005)
Vobornik, D., Margaritondo, G., Sanghera, J. S., Thielen, P., Aggarwal, I. D., Ivanov, B., ...
Scanning near-field optical microscopy (SNOM or NSOM) is the technique with the highest lateral optical resolution available today, while infrared (IR) spectroscopy has a high chemical specificity....
Vobornik, D., Margaritondo, G., Sanghera, J. S., Thielen, P., Aggarwal, I. D., Ivanov, B., ...
Scanning near-field optical microscopy (SNOM) makes it routinely possible to overcome the fundamental diffraction limit of standard (far-field) microscopy. Recently, aperture-based infrared SNOM...
Optical nanospectroscopy applications in material science (2004)
Cricenti, A., Longo, G., Ustione, A., Mussi, V., Generosi, R., Luce, M., ...
The advent of scanning near-field optical microscopy (SNOM) has augmented at a microscopic level the usefulness of optical spectroscopy in the region between 300 nm and 10 mum. Two-dimensional...
Optical nanospectroscopy study of ion-implanted silicon and biological growth medium (2004)
Cricenti, A., Marocchi, V., Generosi, R., Luce, M., Perfetti, P., Vobornik, D., ...
The advent of scanning near-field optical microscopy (SNOM) has augmented at the microscopic level the usefulness of IR spectroscopy. Two-dimensional imaging of chemical constituents makes this a...
Cricenti, A., Generosi, R., Luce, M., Perfetti, P., Margaritondo, G., Talley, D., ...
The infrared (IR) absorption of a biological system can potentially report on fundamentally important microchemical properties. For example, molecular IR profiles are known to change during increases...
Cricenti, A., Longo, G., Luce, M., Generosi, R., Perfetti, P., Vobornik, D., ...
Silicon and silicon nitride surfaces have been successfully terminated with carboxylic acid monolayers and investigated by atomic force microscopy (AFM) and scanning near-field optical microscopy...
IR-SNOM on lithium fluoride films with regular arrays based on colour centres (2003)
Cricenti, A., Longo, G., Mussi, V., Generosi, R., Luce, M., Perfetti, P., ...
LiF films have been grown on silicon substrate, irradiated with soft x-rays to create fluorescent regular micrometric-spaced arrays based on colour centres, and studied by Scanning Near-field Optical...
Multi-kilowatt Peak Power Transmission through Infrared Fibers in the 3 - 5 mm Region (2002)
Busse, L. E., Sanghera, J. S., Aggarwal, I. D., Carbonaro, B., Tarr, M. P.
We have demonstrated high power transmission through selected chalcogenide glass clad fibers using an Optical Parametric Oscillator (OPO) with output in the 3 - 5 mm wavelength region. These results...
Very high resolution near-field chemical imaging using an infrared free electron laser (2002)
Cricenti, A., Generosi, R., Luce, M., Perfetti, P., Margaritondo, G., Talley, D., ...
High resolution infrared imaging of thin films and biological systems is one of the most challenging experimental problems in contemporary science and technology. In this work, we have for the first...
Cricenti, A., Generosi, R., Luce, M., Perfetti, P., Margaritondo, G., Talley, D., ...
Hydrogen chemistry in thin films and biological systems is one of the most difficult experimental problems in today's science and technology We successfully tested a novel solution, based on the...
Scanning near field infrared microscopy using chalcogenide fiber tips (2000)
Talley, D. B., Shaw, L. B., Sanghera, J. S., Aggarwal, I. D., Cricenti, A., Generosi, R., ...
Chalcogenide glass optical fibers were fabricated into functional apertured probes for near field scanning infrared microscopy. Probe fiber tips were chemically etched and aluminum coated for the...
Singlemode chalcogenide fiber infrared SNOM probes (1999)
Schaafsma, D. T., Mossadegh, R., Sanghera, J. S., Aggarwal, I. D., Gilligan, J. M., Tolk, N. H., ...
We have fabricated and tested infrared scanning near-field optical microscope (IR-SNOM) probe tips made from singlemode chalcogenide fiber. The process used to create the tips was similar to...
Infrared-Transmitting Fibers (1998)
Aggarwal, I. D., Busse, L. E., Sanghera, J. S.
Chalcogenide glass fibers have been fabricated with minimum optical loss of 0.23 dB/m in the 1 - 6 mm region. NRL reports on results of applications of these fibers including IRCM and chemical...
Sanghera, J. S., Hart, P., Sachon, M. G., Busse, L., Aggarwal, I.
The glass quality, physical properties, and thermal stability of fluorozirconate and fluorozirco-hafnate glasses were investigated as a function of the AlF3 content. The AlF3 concentration varied...
The Effect on the Environment on the Tensile Strength of Fluorozirconate Glass Fibres. (1998)
Sanghera, J. S., Reinker, D., Mackenzie, J. D.
Fluorozirconate glass fibers were drawn from rod performs without protective polymer coatings and under a nitrogen atmosphere. Fibers which had been stored and tested under an inert atmosphere had...
Oxyfluoride Nucleating Crystals in Fluorozirco-Hafnate Glasses. (1998)
Sanghera, J. S., Sachon, M. G., Hart, P., Aggarwal, I. D.
The effect of Al2O3 on the thermal stability of a fluorozirco-hafnate glass was investigated using X-ray diffractometry, optical microscopy, and scanning/transmission electron microscopy. The...
Jovanovic, J N, Benfenati, F, Siow, Y L, Sihra, T S, Sanghera, J S, Pelech, S L, ...
The ability of neurotrophins to modulate the survival and differentiation of neuronal populations involves the Trk/MAP (mitogen-activated protein kinase) kinase signaling pathway. More recently,...
Immunological characterization of avian MAP kinases: evidence for nuclear localization.
Sanghera, J S, Peter, M, Nigg, E A, Pelech, S L
The subcellular distribution and regulation of MAP kinase isoforms in chicken hepatoma DU249 cells was investigated with antibodies directed against peptides patterned after sequences in the...
Purification and characterization of echinoderm casein kinase II. Regulation by protein kinase C.
Sanghera, J S, Charlton, L A, Paddon, H B, Pelech, S L
Casein kinase II (CKII) is one of several protein kinases that become activated before germinal-vesicle breakdown in maturing sea-star oocytes. Echinoderm CKII was purified over 11,000-fold with a...
Gold, M R, Sanghera, J S, Stewart, J, Pelech, S L
Cross-linking of membrane immunoglobulin (mIg), the B lymphocyte antigen receptor, with anti-receptor antibodies stimulates tyrosine phosphorylation of a number of proteins, including one of 42 kDa....
Cornell, R B, Kalmar, G B, Kay, R J, Johnson, M A, Sanghera, J S, Pelech, S L
The role of the C-terminal domain of CTP: phosphocholine cytidylyltransferase (CT) was explored by the creation of a series of deletion mutations in rat liver cDNA, which were expressed in COS cells...
Pelech, S L, Sanghera, J S, Paddon, H B, Quayle, K A, Brownsey, R W
Maturation-activated protein-serine/threonine kinases were investigated in the high-speed supernatant fractions from sea-star oocytes harvested at the time of germinal vesicle breakdown. One of the...
Jovanovic, J N, Benfenati, F, Siow, Y L, Sihra, T S, Sanghera, J S, Pelech, S L, ...
The ability of neurotrophins to modulate the survival and differentiation of neuronal populations involves the Trk/MAP (mitogen-activated protein kinase) kinase signaling pathway. More recently,...
Immunological characterization of avian MAP kinases: evidence for nuclear localization.
Sanghera, J S, Peter, M, Nigg, E A, Pelech, S L
The subcellular distribution and regulation of MAP kinase isoforms in chicken hepatoma DU249 cells was investigated with antibodies directed against peptides patterned after sequences in the...
Purification and characterization of echinoderm casein kinase II. Regulation by protein kinase C.
Sanghera, J S, Charlton, L A, Paddon, H B, Pelech, S L
Casein kinase II (CKII) is one of several protein kinases that become activated before germinal-vesicle breakdown in maturing sea-star oocytes. Echinoderm CKII was purified over 11,000-fold with a...
Gold, M R, Sanghera, J S, Stewart, J, Pelech, S L
Cross-linking of membrane immunoglobulin (mIg), the B lymphocyte antigen receptor, with anti-receptor antibodies stimulates tyrosine phosphorylation of a number of proteins, including one of 42 kDa....
Cornell, R B, Kalmar, G B, Kay, R J, Johnson, M A, Sanghera, J S, Pelech, S L
The role of the C-terminal domain of CTP: phosphocholine cytidylyltransferase (CT) was explored by the creation of a series of deletion mutations in rat liver cDNA, which were expressed in COS cells...
Pelech, S L, Sanghera, J S, Paddon, H B, Quayle, K A, Brownsey, R W
Maturation-activated protein-serine/threonine kinases were investigated in the high-speed supernatant fractions from sea-star oocytes harvested at the time of germinal vesicle breakdown. One of the...