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Chinese Journal of Lasers

Persistent spectral hole-burning of tetramethoxyphenyl porphin in a polymeric host

Lingbing Chen, Jianhua Fang

Published Jan 1, 1993• 0 citations
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Abstract

Persistent spectral hole-burning is reported for the organic guest molecule 5, 10, 15, 20-tetra-(p-methoxyphenyl) porphin (TMP) imbeded in polymethylmethacrylate (PMMA) host at liquid helium temperature. The effects for power saturation of hole depth and power broadening of hole width were observed. Hole growth dynamics was investigated and the process of light induced hole erasing was measured. Theoretical fits to the experimental data were carried out and hole burning mechanism of the system was discussed.

Related papers

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

Optical Spectra of Single Impurity Molecules in a Polymer: Spectral Diffusion and Persistent Spectral Hole-Burning

Th. Basché, W. E. Moerner

Recent advances in the optical detection and spectroscopy of single impurity centers in crystals has provided the possibility of obtaining information about defect-solid interactions on a truly local level. For the system composed of pentacene impurity molecules in the crystal p-terphenyl, single molecules have been studied using both absorption1 and fluorescence excitation2 techniques at liquid helium temperatures. The superior signal-to-noise of the latter technique has led to direct observations of the lifetime-limited Lorentzian homogeneous profile of a single pentacene impurity3 as well as the surprising observation of spontaneous spectral diffusion4. Spectral diffusion, or changes in the resonance frequency of an impurity molecule with time as a result of low-energy excitations (two-level system transitions (TLS)),5 is generally expected in amorphous hosts. Indeed, the presence of TLSs in amorphous solids is intimately connected with nonphotochemical mechanisms for persistent spectral hole-burning (PSHB) in amorphous materials6-8. Using perylene impurity molecules in poly(ethylene), we have observed the optical spectra of single molecules in a polymeric host for the first time. At 1.5K, individual perylene molecules show the expected spectral diffusion; moreover, we observe light-induced changes in resonance frequency, i.e., persistent spectral hole-burning, which allows one to envision optical storage on the single-molecule level.

Spectral Hole-Burning and Related Spectroscopies: Science and Applications•Jan 1, 1991•0 citations

Observation of persistent spectral hole–burning in semiconductor nanocrystals

Yasuaki Masumoto, Lev Zimin, Kazuhiko Naoe

So far, persistent spectral hole-burning (PSHB) phenomenon has been observed in a number of materials. They are molecules in glasses, crystals and polymers, color centers in alkali halide crystals, and rare earth and transition metal ions in glasses and crystals. They are molecular or ionic guests embedded in glass, crystal or polymer hosts. Basic requirements for the PSHB are summarized as follows: (1) The optical absorption of guests embedded in hosts must be broadened inhomogeneously. (2) There must exist more than one ground state configurations of the total system consisting of guests and hosts. (3) The relaxation among the ground states must be slower than the decay rate of any excited state. In fact, this set of requirements is satisfied in many kinds of molecular or ionic guests in hosts, such as glasses, crystals and polymers, at low temperatures. We can naturally understand that guests consisting of small number of atoms are greatly influenced by the surrounding hosts and that the energy levels of the guests are inhomogeneously broadened.

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

Microparticle-based persistent spectral hole-burning memory at room temperature

Lingbing Chen, Yan Wang, Yong‐Le Pan +5 more

Persistent spectral hole burning with multiplicity was realized at room temperature for Nile blue molecules-doped polymeric dielectric spherical microparticles based on morphology-dependent resonances. Hole parameters depending on burning conditions were studied. Dynamical characteristic behavior of hole formation was measured and analyzed with a model based on rate equations. The effective hole formation rate was obtained by simulation. Photophysical and photochemical mechanisms of the room temperature hole burning for this system was discussed.

Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE•Sep 3, 1996•0 citations

Polarization Spectral Hole-Burning in Organic Materials

Yu Yin, Zhao You-Yuan, Xiao Rong Luo +2 more

A model of polarization spectral hoel-burning was established through the density-matrix method. More than 300% anisotropic persistent spectral holes written in and readout in THP/PMMA and TMP/PMMA materials with high signal-to-ratio by CW linearly polarized light. The effect of probe angle and modulation field on the hole depth and shape wereinterpreted by using the model above.

Chinese Journal of Lasers B•Jan 1, 1995•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
Persistent spectral hole-burning is reported for the organic guest molecule 5, 10, 15, 20-tetra-(p-methoxyphenyl) porphin (TMP) imbeded in polymethylmethacrylate (PMMA) host at liquid helium temperature. The effects for power saturation of hole depth and power broadening of hole width were observed. Hole growth dynamics was investigated and the process of light induced hole erasing was measured. Theoretical fits to the experimental data were carried out and hole burning mechanism of the system was discussed.
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.
Recent advances in the optical detection and spectroscopy of single impurity centers in crystals has provided the possibility of obtaining information about defect-solid interactions on a truly local level. For the system composed of pentacene impurity molecules in the crystal p-terphenyl, single molecules have been studied using both absorption1 and fluorescence excitation2 techniques at liquid helium temperatures. The superior signal-to-noise of the latter technique has led to direct observations of the lifetime-limited Lorentzian homogeneous profile of a single pentacene impurity3 as well as the surprising observation of spontaneous spectral diffusion4. Spectral diffusion, or changes in the resonance frequency of an impurity molecule with time as a result of low-energy excitations (two-level system transitions (TLS)),5 is generally expected in amorphous hosts. Indeed, the presence of TLSs in amorphous solids is intimately connected with nonphotochemical mechanisms for persistent spectral hole-burning (PSHB) in amorphous materials6-8. Using perylene impurity molecules in poly(ethylene), we have observed the optical spectra of single molecules in a polymeric host for the first time. At 1.5K, individual perylene molecules show the expected spectral diffusion; moreover, we observe light-induced changes in resonance frequency, i.e., persistent spectral hole-burning, which allows one to envision optical storage on the single-molecule level.
So far, persistent spectral hole-burning (PSHB) phenomenon has been observed in a number of materials. They are molecules in glasses, crystals and polymers, color centers in alkali halide crystals, and rare earth and transition metal ions in glasses and crystals. They are molecular or ionic guests embedded in glass, crystal or polymer hosts. Basic requirements for the PSHB are summarized as follows: (1) The optical absorption of guests embedded in hosts must be broadened inhomogeneously. (2) There must exist more than one ground state configurations of the total system consisting of guests and hosts. (3) The relaxation among the ground states must be slower than the decay rate of any excited state. In fact, this set of requirements is satisfied in many kinds of molecular or ionic guests in hosts, such as glasses, crystals and polymers, at low temperatures. We can naturally understand that guests consisting of small number of atoms are greatly influenced by the surrounding hosts and that the energy levels of the guests are inhomogeneously broadened.
Persistent spectral hole burning with multiplicity was realized at room temperature for Nile blue molecules-doped polymeric dielectric spherical microparticles based on morphology-dependent resonances. Hole parameters depending on burning conditions were studied. Dynamical characteristic behavior of hole formation was measured and analyzed with a model based on rate equations. The effective hole formation rate was obtained by simulation. Photophysical and photochemical mechanisms of the room temperature hole burning for this system was discussed.
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.