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Spectral Hole-Burning and Related Spectroscopies: Science and Applications

Effect of Photocrosslinking in Polymer Matrix on Hole Properties: Quinizarin Sulfonate Doped Poly(vinyl alcohol)s with Pendent Styrylpyridinium Groups

Toshiro Tani

Published Jan 1, 1992• 0 citations
Publisher

Abstract

Persistent spectral hole burning (PSHB) has attracted much attention due not only to its usefulness in high resolution spectroscopy but also to its applicability to wavelength multiplexed optical memory.1) Though its application is still far from realization, potentially 103 times higher storage density would be attainable. Technological breakthrough is largely concerned with the issue of optimizing storage materials. For the formation of persistent holes, the existence of both photoreactive centers and a solid matrix is essential, and therefore, the comprehension of intramolecular and intermolecular electron-phonon interaction is of great importance. We have already proposed one working hypothesis in connection with the latter, which emphasizes the possibility of controlling the mesoscopic structure of the materials.2-4)

DOI
10.1364/shbl.1992.tub29

Related papers

Designing of Persistent Hole-burning Materials: Spectral Widths and Electronic Structures in Proton Transfer Molecular Systems

Toshiro Tani

Persistent spectral hole burning (PSHB) has attracted much attention due not only to its usefulness in site-selective spectroscopy but also to its applicability to wavelength multiplexed optical memory in the future.1) Though the application is still far from realization, potentially 103 times higher storage density would be attainable. Technological breakthrough is largely concerned with the issue of optimizing the storage materials. For the formation of persistent holes, the existence of both photoreactive centers and a solid matrix is essential, hence the comprehension of intramolecular and intermolecular electron-phonon interaction is of great importance. We have already proposed one working hypothesis, which, derived mainly from the experiments related to the intermolecular interactions, emphasizes the possibility of controlling the mesoscopic structure of the materials.2-4)

Spectral Hole-Burning and Related Spectroscopies: Science and Applications•Jan 1, 1992•0 citations

Photon-Gated Spectral Hole-Burning in a Polymer Doped with a Mixture of Several Zn-Benzoporphyrin Derivatives

B. Luo, Jean‐Pierre Galaup

Photochemical spectral hole-burning (PSHB) has attracted particular attention in the past decade because of its potential for frequency domain optical storage. In order to apply PSHB to a practical optical memory, the material should have high burning temperature, high thermal stability, erasability and high frequency multiplexing. Two ways are possible to increase the storage density: one is to narrow the homogeneous line width, the other is to broaden the inhomogeneous line width. In previous works, the larger inhomogeneous line width (greater than 1,000 cm–1) has been reached in polymethylmethacrylate (PMMA) doped with two kinds of Zn-benzoporphyrin derivatives with roughly the same hole-burning efficiencies [1]. In this paper, the authors investigate systematically the optical properties of Zn-benzoporphyrin derivatives, their hole-burning mechanisms, thermal stability and electron-phonon coupling in cellulose acetate (CA) and in PMMA matrices. The choice of CA was motivated mainly by the fact this polymer allows to prepare samples with excellent optical quality.

Spectral Hole-Burning and Related Spectroscopies: Science and Applications•Jan 1, 1994•0 citations

Aspects of hole burning and spectro-temporal holography in molecular doped solids (Review)

Jean‐Pierre Galaup

The persistent spectral hole-burning (PSHB) phenomenon has been known since 1974. It is still an important research area for the study of the intimacy of complex molecular systems in the solid state, revealing high-resolution spectra, photophysics, photochemistry, and dynamics of molecular doped amorphous media, organic as well as inorganic. From another point of view, PSHB allows the engraving of any spectral structures in the inhomogeneous absorption band profile of molecular doped amorphous hosts or ion doped crystals cooled down to liquid helium temperatures. Therefore, a PSHB material is programmable in the spectral domain and consequently it can be transformed in an optical processor capable of achieving user-defined optical functions. Some aspects of both fields are illustrated in the present paper. Concerning the search for efficient PSHB materials, the hole-burning performances and the photophysics of polymer and xerogel based systems are compared. The problem of high-temperature persistent spectral hole-burning materials and the search for new frequency selective photosensitive systems for fast optical pulse processing at 800nm are considered. Regarding the points treated, inorganic hosts based on silicate xerogels or porous glasses have shown the best results. Moreover, by combining inorganic and organic capabilities or by grafting organic species to the host, hybrid xerogels have not yet revealed all possibilities. Also, the interest of two-photon materials for engraving spectral features with near-infrared or infrared light is developed. As an introduction to possible applications of PSHB material, the basics of spectro-temporal holography are remembered and a demonstrative experiment using a naphthalocyanine-doped polymer film is described, proving that the temporal aberration free recompression of ultrashort light pulses is feasible, therefore opening a way for applications in ultrashort light pulse shaping. Aspects for a comparison between cw hole-burning and femtosecond spectro-temporal experiments are considered, and prospects for coherent control of light fields or photochemical processes are also evoked.

Low Temperature Physics•Nov 1, 2006•1 citation

Room Temperature Hole-Burning in Sm2+-doped Borate Glasses

Kimihiko Hirao

Recently, the interests in optical memory based on persistent spectral hole burning (PSHB) are increased because of its possibility of the application to high density optical memory. PSHB was observed for an organic dye doped in polymer and rear earth or transition metal doped in inorganic crystal or glasses up to now. Since PSHB was observed by two Russian groups (Gorokhovskii et al. and Kharlamov et al.) for free base phthalocyanine in a n-octane Shpol'skii matrix1 and for perylene and 9-aminoacridine molecules in glassy ethanol matrix2, PSHB materials are studied primarily for the polymer doped with an organic dye. But such materials can make hole only at very low temperature. Room temperature PSHB phenomena were observed on Sm2+ doped fluoride crystals3-5 and glasses6 recently, however these materials' Гih(inhomogeneous line width)/Гh(homogeneous line width)'s which are the parameters of data multiplicity in PSHB optical memory are an order of unity. For the application of PSHB materials to optical memory, high operating temperature, high Гih/Гh, and rapid reaction rate are wanted. Glass has a superiority on the view point of optical memory application because of its broad inhomogeneous line width and productivity. Our group has discovered room temperature PSHB for Sm2+ in borate glass systems whose Гih/Гh is 24.7 PSHB for rear earth metal in glass matrix has not been studied seriously, yet. It is thought that the study of the relationship between the optical hole and glass structure is necessary.

Spectral Hole-Burning and Related Spectroscopies: Science and Applications•Jan 1, 1994•0 citations

Persistent spectral hole-burning study on some organic and inorganic materials

Lingbing Chen, Youyuan Zhao, Li Jianzhao +1 more

Persistent spectral hole burning (PSHB) was performed for several porphyrin molecules imbedded in polymer hosts and rare-earth ion Sm2+ doped in BaFCl0.5Br0.5 matrix. Power saturation and broadening effects for hole depth and width were observed. The dynamical process of hole formation was measured and explanation by population rate equations was given. Quantum efficiency of photochemical hole burning was investigated. For BaFCl0.5Br0.5:Sm2+ the capacity of data storage was estimated according to the result of multiple hole burning.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Aug 13, 1993•0 citations

Study on dynamics of persistent spectral hole formation in frequency domain optical storage

You-yuan Zhao

A variety of studies on persistent spectral hole burning (PSHB) have been carried out for the last twenty years [1.2.3], since the discovery of this phenomena in 1974. The elucidation of electron-phonon interaction, the nature of zero-phonon line and spectral diffusion in PSHB have been studied intensively together with the research aiming at its possible applicability to ultra-high density optical information storage in frequency domain.

17th Congress of the International Commission for Optics: Optics for Science and New Technology•Sep 1, 1996•0 citations
Persistent spectral hole burning (PSHB) has attracted much attention due not only to its usefulness in high resolution spectroscopy but also to its applicability to wavelength multiplexed optical memory.1) Though its application is still far from realization, potentially 103 times higher storage density would be attainable. Technological breakthrough is largely concerned with the issue of optimizing storage materials. For the formation of persistent holes, the existence of both photoreactive centers and a solid matrix is essential, and therefore, the comprehension of intramolecular and intermolecular electron-phonon interaction is of great importance. We have already proposed one working hypothesis in connection with the latter, which emphasizes the possibility of controlling the mesoscopic structure of the materials.2-4)
Persistent spectral hole burning (PSHB) has attracted much attention due not only to its usefulness in site-selective spectroscopy but also to its applicability to wavelength multiplexed optical memory in the future.1) Though the application is still far from realization, potentially 103 times higher storage density would be attainable. Technological breakthrough is largely concerned with the issue of optimizing the storage materials. For the formation of persistent holes, the existence of both photoreactive centers and a solid matrix is essential, hence the comprehension of intramolecular and intermolecular electron-phonon interaction is of great importance. We have already proposed one working hypothesis, which, derived mainly from the experiments related to the intermolecular interactions, emphasizes the possibility of controlling the mesoscopic structure of the materials.2-4)
Photochemical spectral hole-burning (PSHB) has attracted particular attention in the past decade because of its potential for frequency domain optical storage. In order to apply PSHB to a practical optical memory, the material should have high burning temperature, high thermal stability, erasability and high frequency multiplexing. Two ways are possible to increase the storage density: one is to narrow the homogeneous line width, the other is to broaden the inhomogeneous line width. In previous works, the larger inhomogeneous line width (greater than 1,000 cm–1) has been reached in polymethylmethacrylate (PMMA) doped with two kinds of Zn-benzoporphyrin derivatives with roughly the same hole-burning efficiencies [1]. In this paper, the authors investigate systematically the optical properties of Zn-benzoporphyrin derivatives, their hole-burning mechanisms, thermal stability and electron-phonon coupling in cellulose acetate (CA) and in PMMA matrices. The choice of CA was motivated mainly by the fact this polymer allows to prepare samples with excellent optical quality.
The persistent spectral hole-burning (PSHB) phenomenon has been known since 1974. It is still an important research area for the study of the intimacy of complex molecular systems in the solid state, revealing high-resolution spectra, photophysics, photochemistry, and dynamics of molecular doped amorphous media, organic as well as inorganic. From another point of view, PSHB allows the engraving of any spectral structures in the inhomogeneous absorption band profile of molecular doped amorphous hosts or ion doped crystals cooled down to liquid helium temperatures. Therefore, a PSHB material is programmable in the spectral domain and consequently it can be transformed in an optical processor capable of achieving user-defined optical functions. Some aspects of both fields are illustrated in the present paper. Concerning the search for efficient PSHB materials, the hole-burning performances and the photophysics of polymer and xerogel based systems are compared. The problem of high-temperature persistent spectral hole-burning materials and the search for new frequency selective photosensitive systems for fast optical pulse processing at 800nm are considered. Regarding the points treated, inorganic hosts based on silicate xerogels or porous glasses have shown the best results. Moreover, by combining inorganic and organic capabilities or by grafting organic species to the host, hybrid xerogels have not yet revealed all possibilities. Also, the interest of two-photon materials for engraving spectral features with near-infrared or infrared light is developed. As an introduction to possible applications of PSHB material, the basics of spectro-temporal holography are remembered and a demonstrative experiment using a naphthalocyanine-doped polymer film is described, proving that the temporal aberration free recompression of ultrashort light pulses is feasible, therefore opening a way for applications in ultrashort light pulse shaping. Aspects for a comparison between cw hole-burning and femtosecond spectro-temporal experiments are considered, and prospects for coherent control of light fields or photochemical processes are also evoked.
Recently, the interests in optical memory based on persistent spectral hole burning (PSHB) are increased because of its possibility of the application to high density optical memory. PSHB was observed for an organic dye doped in polymer and rear earth or transition metal doped in inorganic crystal or glasses up to now. Since PSHB was observed by two Russian groups (Gorokhovskii et al. and Kharlamov et al.) for free base phthalocyanine in a n-octane Shpol'skii matrix1 and for perylene and 9-aminoacridine molecules in glassy ethanol matrix2, PSHB materials are studied primarily for the polymer doped with an organic dye. But such materials can make hole only at very low temperature. Room temperature PSHB phenomena were observed on Sm2+ doped fluoride crystals3-5 and glasses6 recently, however these materials' Гih(inhomogeneous line width)/Гh(homogeneous line width)'s which are the parameters of data multiplicity in PSHB optical memory are an order of unity. For the application of PSHB materials to optical memory, high operating temperature, high Гih/Гh, and rapid reaction rate are wanted. Glass has a superiority on the view point of optical memory application because of its broad inhomogeneous line width and productivity. Our group has discovered room temperature PSHB for Sm2+ in borate glass systems whose Гih/Гh is 24.7 PSHB for rear earth metal in glass matrix has not been studied seriously, yet. It is thought that the study of the relationship between the optical hole and glass structure is necessary.
Persistent spectral hole burning (PSHB) was performed for several porphyrin molecules imbedded in polymer hosts and rare-earth ion Sm2+ doped in BaFCl0.5Br0.5 matrix. Power saturation and broadening effects for hole depth and width were observed. The dynamical process of hole formation was measured and explanation by population rate equations was given. Quantum efficiency of photochemical hole burning was investigated. For BaFCl0.5Br0.5:Sm2+ the capacity of data storage was estimated according to the result of multiple hole burning.