Dr. P. S. Ramanujam Profile

Dr. P. S. Ramanujam

at Risø DTU

SPIE Involvement:

Author

Publications (15)

Proceedings Article | 9 June 2006 Paper

Organic materials for UV holographic and digital storage

P. Ramanujam, B. Lohse, Rolf Berg

Proceedings Volume 6252, 62520V (2006) https://doi.org/10.1117/12.677015

KEYWORDS: Absorption, Holography, Chromophores, Diffraction gratings, Digital holography, Thin films, Ultraviolet radiation, Optical storage, Crystals, Diffraction

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Proceedings Article | 18 June 2004 Paper

Photodimerization for high-capacity digital optical storage

P. Ramanujam, B. Lohse, Rolf Berg

Proceedings Volume 5351, (2004) https://doi.org/10.1117/12.528062

KEYWORDS: Optical storage, Ultraviolet radiation, Chromophores, Absorption, Semiconductor lasers, Holography, Crystals, Absorbance, Diffraction, Diffraction gratings

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Proceedings Article | 16 September 2003 Paper

Photochromic processes for high density optical storage

P. Ramanujam, Rolf Berg

Proceedings Volume 5069, (2003) https://doi.org/10.1117/12.532514

KEYWORDS: Optical storage, Absorption, Ultraviolet radiation, Crystals, Chromophores, Thin films, Molecules, Polymers, Semiconductor lasers, Diffraction

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Proceedings Article | 14 July 2003 Paper

Polarization holographic data storage using azobenzene polyester as storage material

Emoeke Loerincz, Gabor Szarvas, Pal Koppa, Ferenc Ujhelyi, Gabor Erdei, Attila Sueto, Peter Varhegyi, Sz. Sajti, A. Kerekes, T. Ujvari, P. Ramanujam

Proceedings Volume 4991, (2003) https://doi.org/10.1117/12.479454

KEYWORDS: Holography, Holograms, Polarization, Data storage, Computer simulations, Thin films, Spatial light modulators, Objectives, Anisotropy, Data modeling

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Proceedings Article | 10 January 2002 Paper

Read/write demonstrator of rewritable holographic memory card system

Emoeke Loerincz, Ferenc Ujhelyi, Pal Koppa, A. Kerekes, Gabor Szarvas, Gabor Erdei, Jozsua Fodor, Sz. Mike, Attila Sueto, Peter Varhegyi, P. Ramanujam, Soeren Hvilsted

Proceedings Volume 4342, (2002) https://doi.org/10.1117/12.453409

KEYWORDS: Holography, Objectives, Spatial light modulators, Holograms, Polarization, Optical storage, Mirrors, Data storage, Semiconductor lasers, Reflectivity

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Proceedings Article | 3 October 2000 Paper

Data storage on holographic memory card

Pal Koppa, Gabor Erdei, Ferenc Ujhelyi, Peter Varhegyi, T. Ujvari, Emoeke Loerincz, Gabor Szarvas, Soeren Hvilsted, P. Ramanujam, Peter Richter

Proceedings Volume 4149, (2000) https://doi.org/10.1117/12.402495

KEYWORDS: Holography, Holograms, Polarization, Data storage, Spatial light modulators, Reflectivity, Polymer thin films, Objectives, Polymers, Optical storage

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Proceedings Article | 3 October 2000 Paper

Rewritable azobenzene polyester for polarization holographic data storage

A. Kerekes, Sz. Sajti, Emoeke Loerincz, Soeren Hvilsted, P. Ramanujam

Proceedings Volume 4149, (2000) https://doi.org/10.1117/12.402497

KEYWORDS: Diffraction gratings, Anisotropy, Diffraction, Holography, Polarization, Phase shifts, Reflectivity, Optical storage, Energy efficiency, Data storage

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Proceedings Article | 18 September 2000 Paper

Rewritable holographic memory card system

Emoeke Loerincz, Ferenc Ujhelyi, Attila Sueto, Gabor Szarvas, Pal Koppa, Gabor Erdei, Soeren Hvilsted, P. Ramanujam, Peter Richter

Proceedings Volume 4090, (2000) https://doi.org/10.1117/12.399357

KEYWORDS: Holography, Polarization, Optical storage, Holograms, Spatial light modulators, Binary data, Data storage, Objectives, Image filtering, Laser sources

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Proceedings Article | 19 July 1999 Paper

Nonlinear optical element for incoherent image processing based on photoanisotropy

Burkhard Fleck, Lutz Wenke, P. Ramanujam

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354783

KEYWORDS: Fourier transforms, Image processing, Polarization, Anisotropy, Statistical analysis, Optical components, Beam splitters, Optical signal processing, Inspection, Remote sensing

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Proceedings Article | 28 April 1999 Paper

Holographic memory

P. Ramanujam, N. Holme, Rolf Berg, Soeren Hvilsted

Proceedings Volume 3666, (1999) https://doi.org/10.1117/12.347985

KEYWORDS: Polymers, Holography, Holograms, Polarization, Crystals, Liquid crystals, Liquids, Diffraction, Data storage, Spatial frequencies

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Proceedings Article | 2 January 1998 Paper

Bacteriorhodopsin: an ideal material for optical processing

P. Ramanujam, Lars Lindvold

Proceedings Volume 3211, (1998) https://doi.org/10.1117/12.345366

KEYWORDS: Optical signal processing, Proteins, Bacteria, Optical properties, Absorption, Nonlinear optical materials, Thin films, Holography

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Proceedings Article | 10 April 1997 Paper

Erasable holographic storage in azobenzene polyesters and peptides

P. Ramanujam, N. Holme, L. Nikolova, Rolf Berg, Soeren Hvilsted, Erik Kristensen, C. Kulinna, A. Nielsen, M. Pedersen

Proceedings Volume 3011, (1997) https://doi.org/10.1117/12.271362

KEYWORDS: Diffraction, Polarization, Holography, Anisotropy, Holograms, Polymers, Optical storage, Thin films, FT-IR spectroscopy, Near field optics

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Proceedings Article | 7 December 1994 Paper

Sensitometric properties of chemically modified bacteriorhodopsin films

Lars Lindvold, Husain Imam, P. Ramanujam

Proceedings Volume 2429, (1994) https://doi.org/10.1117/12.195578

KEYWORDS: Absorption, Optical storage, Anisotropy, Proteins, Molecules, Curium, Holography, Chromophores, Polarization, Camera shutters

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Proceedings Article | 31 January 1994 Paper

Characterization of the orientational behavior of liquid-crystalline side-chain polymers for reversible optical data storage by Fourier-transform-IR-spectroscopy

Ch. Kulinna, I. Zebger, Heinz Siesler, Soeren Hvilsted, P. Ramanujam

Proceedings Volume 2089, (1994) https://doi.org/10.1117/12.166676

KEYWORDS: Argon ion lasers, Polarization, Optical storage, Polymers, FT-IR spectroscopy, Spectroscopy, Infrared radiation, Infrared spectroscopy, Temperature metrology, Absorption

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Proceedings Article | 16 December 1992 Paper

Generation of sub-Poisson distribution of light

P. Ramanujam, N. Gronbech-Jensen

Proceedings Volume 1622, (1992) https://doi.org/10.1117/12.636808

KEYWORDS: Refractive index, Reflectivity, Laser damage threshold, Optical communications, Laser scattering, Mirrors, Internal quantum efficiency, Sensors, Glasses, Reflection

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Showing 5 of 15 publications

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