The Experts below are selected from a list of 81 Experts worldwide ranked by ideXlab platform

Natalia P. Kuzmina - One of the best experts on this subject based on the ideXlab platform.

  • Two-diode organic Light Amplifiers/converters and peculiarities of photocurrent multiplication
    Synthetic Metals, 2006
    Co-Authors: Leonid S. Lepnev, Andrei Vaschenko, Alexei G. Vitukhnovsky, Svetlana V. Eliseeva, O. V. Kotova, Sofia I. Torgova, Natalia P. Kuzmina
    Abstract:

    Abstract The novel tandem two-diode organic amplifier/converter of Light based on successively connected photosensitive and Light emission cells with spatial disjunction of processes of photocurrent multiplication (PM) and electroluminescence (EL) has been proposed and realized. The terbium complex Tb(Sal)3(TPPO)2 (HSal – salicylic acid, TPPO – triphenylphosphine oxide) or aluminum tris-(8-hydroxyquinoline (Alq3)) have been used as active layers in Light emission cell of device as well as the perylene pigment Me-PTC (N,N″-dimethylperylene-3,4,9,10-bis(decarboximide)) in the photosensitive one. The suggested method of amplification/conversion has some advantages: (1) it avoids the necessity to adjust HOMO- and LUMO levels of photosensitive and electroluminescent layers and thus, extends the range of suitable Light emissive materials including ones with high emission characteristics, (2) it also eliminates reabsorption of Light by photosensitive part of the system and so, extends spectral band of amplification/conversion. A modernized model of field-activated structural traps has been suggested. Kinetics of PM during Light- and voltage switching with time pauses is explained using this model. The peculiarities of PM and its kinetics at different Light intensities, temperatures and applied voltages are analyzed too. Optimal values of temperatures, voltages and Light excitation intensities providing high PM have been found. The PM gain up to 105-fold has been achieved. The conversion of long-wave (λ = 600 nm) Light into narrow emission bands of Tb(Sal)3(TPPO)2 (λmax 545 nm) and wide-band (from 490 nm) emission of Alq3 has been obtained. Up- and down-conversion of Light along with enhancement of emission have been observed in both devices. A computer simulation of the tandem-diode amplifier/converter has been performed and operation conditions providing transition from the up-conversion mode to the enhancement of Light mode have been studied. It has been demonstrated that the processes of PM and the bias redistribution between the units of device exert strong influence to one another and only their unification leads to the tandem-diode operation.

  • two diode organic Light Amplifiers converters and peculiarities of photocurrent multiplication
    Synthetic Metals, 2006
    Co-Authors: Leonid S. Lepnev, Andrei Vaschenko, Alexei G. Vitukhnovsky, Svetlana V. Eliseeva, O. V. Kotova, Sofia I. Torgova, Natalia P. Kuzmina
    Abstract:

    Abstract The novel tandem two-diode organic amplifier/converter of Light based on successively connected photosensitive and Light emission cells with spatial disjunction of processes of photocurrent multiplication (PM) and electroluminescence (EL) has been proposed and realized. The terbium complex Tb(Sal)3(TPPO)2 (HSal – salicylic acid, TPPO – triphenylphosphine oxide) or aluminum tris-(8-hydroxyquinoline (Alq3)) have been used as active layers in Light emission cell of device as well as the perylene pigment Me-PTC (N,N″-dimethylperylene-3,4,9,10-bis(decarboximide)) in the photosensitive one. The suggested method of amplification/conversion has some advantages: (1) it avoids the necessity to adjust HOMO- and LUMO levels of photosensitive and electroluminescent layers and thus, extends the range of suitable Light emissive materials including ones with high emission characteristics, (2) it also eliminates reabsorption of Light by photosensitive part of the system and so, extends spectral band of amplification/conversion. A modernized model of field-activated structural traps has been suggested. Kinetics of PM during Light- and voltage switching with time pauses is explained using this model. The peculiarities of PM and its kinetics at different Light intensities, temperatures and applied voltages are analyzed too. Optimal values of temperatures, voltages and Light excitation intensities providing high PM have been found. The PM gain up to 105-fold has been achieved. The conversion of long-wave (λ = 600 nm) Light into narrow emission bands of Tb(Sal)3(TPPO)2 (λmax 545 nm) and wide-band (from 490 nm) emission of Alq3 has been obtained. Up- and down-conversion of Light along with enhancement of emission have been observed in both devices. A computer simulation of the tandem-diode amplifier/converter has been performed and operation conditions providing transition from the up-conversion mode to the enhancement of Light mode have been studied. It has been demonstrated that the processes of PM and the bias redistribution between the units of device exert strong influence to one another and only their unification leads to the tandem-diode operation.

Maurice V. Wilkes - One of the best experts on this subject based on the ideXlab platform.

  • ESSAY SIXTEEN – Light Amplifiers and Solitons
    Computing Perspectives, 1995
    Co-Authors: Maurice V. Wilkes
    Abstract:

    Publisher Summary This chapter describes Light Amplifiers and solitons. The Light amplifier is one of the most remarkable inventions of recent years. In a Light amplifier, the amplification depends on laser action, the word laser, it will be recalled, being an acronym for Light amplification by stimulated emission of radiation. Surprisingly, special fiber is not essential. Regular fiber can provide the laser action. All that is necessary is to inject, at a point where the signal is weak, a strong input from a separate, continuously running semiconductor laser. Light Amplifiers may be expected to find wide application. For example, they will greatly facilitate the use of optical fiber for cable television because, given the availability of an amplifier, the amount of energy it is necessary to bleed off for each subscriber or group of subscribers is very small. In telecommunications, it is now possible to contemplate the design of submarine cables using Amplifiers instead of repeaters. For the more distant future, there is the interesting possibility of being able to treat nonlinearity as an ally rather than as an enemy. Russell realized that if an attempt were made to launch a solitary wave of small enough amplitude for the motion to be linear, dispersion would soon cause the wave to lose its form, and that the stability of the wave he had observed depended on nonlinearity. Solitary waves in a canal can be of any amplitude. The larger the amplitude, the smaller the width of the wave and the higher its speed.

  • Light Amplifiers and solitons
    Communications of the ACM, 1993
    Co-Authors: Maurice V. Wilkes
    Abstract:

    This chapter describes Light Amplifiers and solitons. The Light amplifier is one of the most remarkable inventions of recent years. In a Light amplifier, the amplification depends on laser action, the word laser, it will be recalled, being an acronym for Light amplification by stimulated emission of radiation. Surprisingly, special fiber is not essential. Regular fiber can provide the laser action. All that is necessary is to inject, at a point where the signal is weak, a strong input from a separate, continuously running semiconductor laser. Light Amplifiers may be expected to find wide application. For example, they will greatly facilitate the use of optical fiber for cable television because, given the availability of an amplifier, the amount of energy it is necessary to bleed off for each subscriber or group of subscribers is very small. In telecommunications, it is now possible to contemplate the design of submarine cables using Amplifiers instead of repeaters. For the more distant future, there is the interesting possibility of being able to treat nonlinearity as an ally rather than as an enemy. Russell realized that if an attempt were made to launch a solitary wave of small enough amplitude for the motion to be linear, dispersion would soon cause the wave to lose its form, and that the stability of the wave he had observed depended on nonlinearity. Solitary waves in a canal can be of any amplitude. The larger the amplitude, the smaller the width of the wave and the higher its speed.

Leonid S. Lepnev - One of the best experts on this subject based on the ideXlab platform.

  • Two-diode organic Light Amplifiers/converters and peculiarities of photocurrent multiplication
    Synthetic Metals, 2006
    Co-Authors: Leonid S. Lepnev, Andrei Vaschenko, Alexei G. Vitukhnovsky, Svetlana V. Eliseeva, O. V. Kotova, Sofia I. Torgova, Natalia P. Kuzmina
    Abstract:

    Abstract The novel tandem two-diode organic amplifier/converter of Light based on successively connected photosensitive and Light emission cells with spatial disjunction of processes of photocurrent multiplication (PM) and electroluminescence (EL) has been proposed and realized. The terbium complex Tb(Sal)3(TPPO)2 (HSal – salicylic acid, TPPO – triphenylphosphine oxide) or aluminum tris-(8-hydroxyquinoline (Alq3)) have been used as active layers in Light emission cell of device as well as the perylene pigment Me-PTC (N,N″-dimethylperylene-3,4,9,10-bis(decarboximide)) in the photosensitive one. The suggested method of amplification/conversion has some advantages: (1) it avoids the necessity to adjust HOMO- and LUMO levels of photosensitive and electroluminescent layers and thus, extends the range of suitable Light emissive materials including ones with high emission characteristics, (2) it also eliminates reabsorption of Light by photosensitive part of the system and so, extends spectral band of amplification/conversion. A modernized model of field-activated structural traps has been suggested. Kinetics of PM during Light- and voltage switching with time pauses is explained using this model. The peculiarities of PM and its kinetics at different Light intensities, temperatures and applied voltages are analyzed too. Optimal values of temperatures, voltages and Light excitation intensities providing high PM have been found. The PM gain up to 105-fold has been achieved. The conversion of long-wave (λ = 600 nm) Light into narrow emission bands of Tb(Sal)3(TPPO)2 (λmax 545 nm) and wide-band (from 490 nm) emission of Alq3 has been obtained. Up- and down-conversion of Light along with enhancement of emission have been observed in both devices. A computer simulation of the tandem-diode amplifier/converter has been performed and operation conditions providing transition from the up-conversion mode to the enhancement of Light mode have been studied. It has been demonstrated that the processes of PM and the bias redistribution between the units of device exert strong influence to one another and only their unification leads to the tandem-diode operation.

  • two diode organic Light Amplifiers converters and peculiarities of photocurrent multiplication
    Synthetic Metals, 2006
    Co-Authors: Leonid S. Lepnev, Andrei Vaschenko, Alexei G. Vitukhnovsky, Svetlana V. Eliseeva, O. V. Kotova, Sofia I. Torgova, Natalia P. Kuzmina
    Abstract:

    Abstract The novel tandem two-diode organic amplifier/converter of Light based on successively connected photosensitive and Light emission cells with spatial disjunction of processes of photocurrent multiplication (PM) and electroluminescence (EL) has been proposed and realized. The terbium complex Tb(Sal)3(TPPO)2 (HSal – salicylic acid, TPPO – triphenylphosphine oxide) or aluminum tris-(8-hydroxyquinoline (Alq3)) have been used as active layers in Light emission cell of device as well as the perylene pigment Me-PTC (N,N″-dimethylperylene-3,4,9,10-bis(decarboximide)) in the photosensitive one. The suggested method of amplification/conversion has some advantages: (1) it avoids the necessity to adjust HOMO- and LUMO levels of photosensitive and electroluminescent layers and thus, extends the range of suitable Light emissive materials including ones with high emission characteristics, (2) it also eliminates reabsorption of Light by photosensitive part of the system and so, extends spectral band of amplification/conversion. A modernized model of field-activated structural traps has been suggested. Kinetics of PM during Light- and voltage switching with time pauses is explained using this model. The peculiarities of PM and its kinetics at different Light intensities, temperatures and applied voltages are analyzed too. Optimal values of temperatures, voltages and Light excitation intensities providing high PM have been found. The PM gain up to 105-fold has been achieved. The conversion of long-wave (λ = 600 nm) Light into narrow emission bands of Tb(Sal)3(TPPO)2 (λmax 545 nm) and wide-band (from 490 nm) emission of Alq3 has been obtained. Up- and down-conversion of Light along with enhancement of emission have been observed in both devices. A computer simulation of the tandem-diode amplifier/converter has been performed and operation conditions providing transition from the up-conversion mode to the enhancement of Light mode have been studied. It has been demonstrated that the processes of PM and the bias redistribution between the units of device exert strong influence to one another and only their unification leads to the tandem-diode operation.

Alexei G. Vitukhnovsky - One of the best experts on this subject based on the ideXlab platform.

  • Two-diode organic Light Amplifiers/converters and peculiarities of photocurrent multiplication
    Synthetic Metals, 2006
    Co-Authors: Leonid S. Lepnev, Andrei Vaschenko, Alexei G. Vitukhnovsky, Svetlana V. Eliseeva, O. V. Kotova, Sofia I. Torgova, Natalia P. Kuzmina
    Abstract:

    Abstract The novel tandem two-diode organic amplifier/converter of Light based on successively connected photosensitive and Light emission cells with spatial disjunction of processes of photocurrent multiplication (PM) and electroluminescence (EL) has been proposed and realized. The terbium complex Tb(Sal)3(TPPO)2 (HSal – salicylic acid, TPPO – triphenylphosphine oxide) or aluminum tris-(8-hydroxyquinoline (Alq3)) have been used as active layers in Light emission cell of device as well as the perylene pigment Me-PTC (N,N″-dimethylperylene-3,4,9,10-bis(decarboximide)) in the photosensitive one. The suggested method of amplification/conversion has some advantages: (1) it avoids the necessity to adjust HOMO- and LUMO levels of photosensitive and electroluminescent layers and thus, extends the range of suitable Light emissive materials including ones with high emission characteristics, (2) it also eliminates reabsorption of Light by photosensitive part of the system and so, extends spectral band of amplification/conversion. A modernized model of field-activated structural traps has been suggested. Kinetics of PM during Light- and voltage switching with time pauses is explained using this model. The peculiarities of PM and its kinetics at different Light intensities, temperatures and applied voltages are analyzed too. Optimal values of temperatures, voltages and Light excitation intensities providing high PM have been found. The PM gain up to 105-fold has been achieved. The conversion of long-wave (λ = 600 nm) Light into narrow emission bands of Tb(Sal)3(TPPO)2 (λmax 545 nm) and wide-band (from 490 nm) emission of Alq3 has been obtained. Up- and down-conversion of Light along with enhancement of emission have been observed in both devices. A computer simulation of the tandem-diode amplifier/converter has been performed and operation conditions providing transition from the up-conversion mode to the enhancement of Light mode have been studied. It has been demonstrated that the processes of PM and the bias redistribution between the units of device exert strong influence to one another and only their unification leads to the tandem-diode operation.

  • two diode organic Light Amplifiers converters and peculiarities of photocurrent multiplication
    Synthetic Metals, 2006
    Co-Authors: Leonid S. Lepnev, Andrei Vaschenko, Alexei G. Vitukhnovsky, Svetlana V. Eliseeva, O. V. Kotova, Sofia I. Torgova, Natalia P. Kuzmina
    Abstract:

    Abstract The novel tandem two-diode organic amplifier/converter of Light based on successively connected photosensitive and Light emission cells with spatial disjunction of processes of photocurrent multiplication (PM) and electroluminescence (EL) has been proposed and realized. The terbium complex Tb(Sal)3(TPPO)2 (HSal – salicylic acid, TPPO – triphenylphosphine oxide) or aluminum tris-(8-hydroxyquinoline (Alq3)) have been used as active layers in Light emission cell of device as well as the perylene pigment Me-PTC (N,N″-dimethylperylene-3,4,9,10-bis(decarboximide)) in the photosensitive one. The suggested method of amplification/conversion has some advantages: (1) it avoids the necessity to adjust HOMO- and LUMO levels of photosensitive and electroluminescent layers and thus, extends the range of suitable Light emissive materials including ones with high emission characteristics, (2) it also eliminates reabsorption of Light by photosensitive part of the system and so, extends spectral band of amplification/conversion. A modernized model of field-activated structural traps has been suggested. Kinetics of PM during Light- and voltage switching with time pauses is explained using this model. The peculiarities of PM and its kinetics at different Light intensities, temperatures and applied voltages are analyzed too. Optimal values of temperatures, voltages and Light excitation intensities providing high PM have been found. The PM gain up to 105-fold has been achieved. The conversion of long-wave (λ = 600 nm) Light into narrow emission bands of Tb(Sal)3(TPPO)2 (λmax 545 nm) and wide-band (from 490 nm) emission of Alq3 has been obtained. Up- and down-conversion of Light along with enhancement of emission have been observed in both devices. A computer simulation of the tandem-diode amplifier/converter has been performed and operation conditions providing transition from the up-conversion mode to the enhancement of Light mode have been studied. It has been demonstrated that the processes of PM and the bias redistribution between the units of device exert strong influence to one another and only their unification leads to the tandem-diode operation.

Svetlana V. Eliseeva - One of the best experts on this subject based on the ideXlab platform.

  • Two-diode organic Light Amplifiers/converters and peculiarities of photocurrent multiplication
    Synthetic Metals, 2006
    Co-Authors: Leonid S. Lepnev, Andrei Vaschenko, Alexei G. Vitukhnovsky, Svetlana V. Eliseeva, O. V. Kotova, Sofia I. Torgova, Natalia P. Kuzmina
    Abstract:

    Abstract The novel tandem two-diode organic amplifier/converter of Light based on successively connected photosensitive and Light emission cells with spatial disjunction of processes of photocurrent multiplication (PM) and electroluminescence (EL) has been proposed and realized. The terbium complex Tb(Sal)3(TPPO)2 (HSal – salicylic acid, TPPO – triphenylphosphine oxide) or aluminum tris-(8-hydroxyquinoline (Alq3)) have been used as active layers in Light emission cell of device as well as the perylene pigment Me-PTC (N,N″-dimethylperylene-3,4,9,10-bis(decarboximide)) in the photosensitive one. The suggested method of amplification/conversion has some advantages: (1) it avoids the necessity to adjust HOMO- and LUMO levels of photosensitive and electroluminescent layers and thus, extends the range of suitable Light emissive materials including ones with high emission characteristics, (2) it also eliminates reabsorption of Light by photosensitive part of the system and so, extends spectral band of amplification/conversion. A modernized model of field-activated structural traps has been suggested. Kinetics of PM during Light- and voltage switching with time pauses is explained using this model. The peculiarities of PM and its kinetics at different Light intensities, temperatures and applied voltages are analyzed too. Optimal values of temperatures, voltages and Light excitation intensities providing high PM have been found. The PM gain up to 105-fold has been achieved. The conversion of long-wave (λ = 600 nm) Light into narrow emission bands of Tb(Sal)3(TPPO)2 (λmax 545 nm) and wide-band (from 490 nm) emission of Alq3 has been obtained. Up- and down-conversion of Light along with enhancement of emission have been observed in both devices. A computer simulation of the tandem-diode amplifier/converter has been performed and operation conditions providing transition from the up-conversion mode to the enhancement of Light mode have been studied. It has been demonstrated that the processes of PM and the bias redistribution between the units of device exert strong influence to one another and only their unification leads to the tandem-diode operation.

  • two diode organic Light Amplifiers converters and peculiarities of photocurrent multiplication
    Synthetic Metals, 2006
    Co-Authors: Leonid S. Lepnev, Andrei Vaschenko, Alexei G. Vitukhnovsky, Svetlana V. Eliseeva, O. V. Kotova, Sofia I. Torgova, Natalia P. Kuzmina
    Abstract:

    Abstract The novel tandem two-diode organic amplifier/converter of Light based on successively connected photosensitive and Light emission cells with spatial disjunction of processes of photocurrent multiplication (PM) and electroluminescence (EL) has been proposed and realized. The terbium complex Tb(Sal)3(TPPO)2 (HSal – salicylic acid, TPPO – triphenylphosphine oxide) or aluminum tris-(8-hydroxyquinoline (Alq3)) have been used as active layers in Light emission cell of device as well as the perylene pigment Me-PTC (N,N″-dimethylperylene-3,4,9,10-bis(decarboximide)) in the photosensitive one. The suggested method of amplification/conversion has some advantages: (1) it avoids the necessity to adjust HOMO- and LUMO levels of photosensitive and electroluminescent layers and thus, extends the range of suitable Light emissive materials including ones with high emission characteristics, (2) it also eliminates reabsorption of Light by photosensitive part of the system and so, extends spectral band of amplification/conversion. A modernized model of field-activated structural traps has been suggested. Kinetics of PM during Light- and voltage switching with time pauses is explained using this model. The peculiarities of PM and its kinetics at different Light intensities, temperatures and applied voltages are analyzed too. Optimal values of temperatures, voltages and Light excitation intensities providing high PM have been found. The PM gain up to 105-fold has been achieved. The conversion of long-wave (λ = 600 nm) Light into narrow emission bands of Tb(Sal)3(TPPO)2 (λmax 545 nm) and wide-band (from 490 nm) emission of Alq3 has been obtained. Up- and down-conversion of Light along with enhancement of emission have been observed in both devices. A computer simulation of the tandem-diode amplifier/converter has been performed and operation conditions providing transition from the up-conversion mode to the enhancement of Light mode have been studied. It has been demonstrated that the processes of PM and the bias redistribution between the units of device exert strong influence to one another and only their unification leads to the tandem-diode operation.