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Papers by Edmundo Gutierrez

32nd European Solid-State Device Research Conference, 2002

Optimizing the electromagnetic performance of MOSbased magnetic sensors requires a deep knowledge... more Optimizing the electromagnetic performance of MOSbased magnetic sensors requires a deep knowledge of the electro-magnetic force interaction when the device is exposed to a magnetic field in a cryogenic ambient. Analytical approaches derived from numerical simulations are not appropriated under these conditions. Therefore, we use MINIMOS-NT to perform full 3D physics-based simulations of a two-drain MAGFET. The simulation results match

13th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2000. Conference Proceedings (IEEE Cat. No.00EX428), 2000

The paper investigates the selection of the electromagnetic modes of a dielectric sphere in a com... more The paper investigates the selection of the electromagnetic modes of a dielectric sphere in a compound multilayer resonator of optical frequencies. The waveguide properties of the spherical stack are investigated for systems of optical layers with arbitrary ratio between layer thickness and wavelength. The appropriate matrix formalism is developed. Both the reflection coefficient and the impedance of the stack are calculated. Depending on the number of layers, it is possible to decrease sharply the impedance of the system. It is shown that increasing the number of layers in the stack considerably increases the quality of oscillations. We offer to use such systems in optical communication systems for processing of signals

12th International Conference on Microwaves and Radar. MIKON-98. Conference Proceedings (IEEE Cat. No.98EX195), 1998

ABSTRACT Theoretical investigation of injection problem in powerful quasi-optical modulators is p... more ABSTRACT Theoretical investigation of injection problem in powerful quasi-optical modulators is presented. It is shown that the possibility of increasing current and the level of controlling power is thanks to the optimal regime of injection for surface integrated p-i-n structure with “deep” junctions. The increase of the diffusion coefficient due to existing electromagnetic wave and the criterion of high-power wave are obtained

16th International Conference on Electronics, Communications and Computers (CONIELECOMP'06), 2006

We have shown by simulations a possibility of amplification of space charge waves in strained Si/... more We have shown by simulations a possibility of amplification of space charge waves in strained Si/SiGe heterostructure at 77 K, using the negative differential conductivity phenomenon. In this work we also have done a comparison between the n-GaAs thin film and strained Si/SiGe ...

15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05), 2005

A full comparative study of three models to describe the transport of carrier in GaAs is presente... more A full comparative study of three models to describe the transport of carrier in GaAs is presented. these models were done by Tomizawa, Shur, and Rrodrigues, using the balance equations, where two-valley model in which only the γ-valley and the l-valleys were taken into account. these models have been used to describe the space charge wave propagation in thin n-GaAs films. it has been demonstrated that sometimes the models of Shur and Rodrigues may lead to incorrect results. Essential peculiarities of the Tomizawa's model has been put forward.

2006 International Conference on Microwaves, Radar & Wireless Communications, 2006

ABSTRACT Propagation of exchangeless spin-dipole waves (SDW) in the centimeter (f ~ 3-20 GHz) and... more ABSTRACT Propagation of exchangeless spin-dipole waves (SDW) in the centimeter (f ~ 3-20 GHz) and millimeter (f~ 35-60 GHz) wave ranges in ferrite films in inhomogeneous bias magnetic fields is investigated. It has been shown that electromagnetic retardation influences the dispersion properties of the backward volume SDW at longitudinal wave numbers k les 150 cm-1 in the millimeter wave range. A propagation of SDW in inhomogeneous bias magnetic fields is considered within the framework of complex geometrical optics. A possibility of the transformation of the type of SDW (from surface SDW to backward volume SDW) has been demonstrated both in centimeter and millimeter wave ranges.

(ICEEE). 1st International Conference on Electrical and Electronics Engineering, 2004., 2004

Three-wave nonlinear interactions of space charge waves in thin n-GaAs film, possessing the negat... more Three-wave nonlinear interactions of space charge waves in thin n-GaAs film, possessing the negative differential mobility, are simulated. An effective frequency up-conversion with amplification in millimeter wave range is demonstrated. The Poisson's equation and the set of quasi-hydrodynamic equations have been simulated by the finite difference method. An influence of transverse inhomogeneity in the plane of the film on three-wave interaction in active medium has been investigated.

The 3rd International IEEE-NEWCAS Conference, 2005., 2005

Analog ICs simulations using space charge waves in two-valley semiconductor for microwave and mil... more Analog ICs simulations using space charge waves in two-valley semiconductor for microwave and millimeter range singnal processing is presented. The formulation incorporates the full set of Maxwell's equations and the equations of motion of carriers based on a two-valley fully specified model providing a quantitative description of the space charge waves in thin-film n-GaAs. Numerical solutions to the system of equations indicate that the propagation and amplification of space charge waves in the thin film for four signals with different frequencies is possible. The present formulation can also find application where we need to know the interaction of electromagnetic waves and charge carriers.

Journal of Socio-Economics

ABSTRACT

2004 24th International Conference on Microelectronics (IEEE Cat. No.04TH8716), 2004

An optical single- and multi mode fiber splicing process based on optical beam self-trapping in p... more An optical single- and multi mode fiber splicing process based on optical beam self-trapping in photocurable organic materials with light induced increase of the refractive index is investigated both theoretically and experimentally. The ends of two optical fiber cables to be spliced are immersed in a photocurable material with a gap maintained between them. The terminal ends of individual fibers

This report is devoted to the experimental and theoretical aspects of the nonlinear interaction a... more This report is devoted to the experimental and theoretical aspects of the nonlinear interaction and influence of the acoustic waves on the ionosphere. This nonlinear phenomenon gives the possibility to simulate the acoustic channel of the lithosphere-atmosphere-ionosphere connection, and to investigate experimentally this channel by means of acoustic generators located on the earth surface. The increase of the transparency of the ionosphere for the cosmic radiowaves caused by a low frequency atmospheric acoustic wave is investigated. Atmospheric acoustic wave creates in the ionosphere a periodic structure of the electron density, like the one created by using two high-power radiowave signals. It is shown that if the length of the acoustic wave is equal or larger than the radiowave length, then a resonant transmission of the radiowaves takes place in the ionosphere.

Journal of Socio-Economics

This paper reports theoretical and experimental results of passive microwave antennas based on si... more This paper reports theoretical and experimental results of passive microwave antennas based on silicon P-I-N structure and ferroelectric ceramics suitable for passive communication with a descending cosmic object.

In this paper the electrical performance of submicron MOS transistors at low temperatures is expl... more In this paper the electrical performance of submicron MOS transistors at low temperatures is explored. This way we found that second-order effects like; the bias dependent series resistance, the second substrate current hump and some others, are amplified allowing so an easier way to study them and to determine their physical origin.

A silicon magnetic field sensor (MFS) has been tested from 300 K down to 77 K. At 77 K the minimu... more A silicon magnetic field sensor (MFS) has been tested from 300 K down to 77 K. At 77 K the minimum detectable magnetic field B i n is 100 J1T compared to 3.5 mT at 300 K. m The relative magnetic sensitivity Sr increases from 0.046 1'1 at 300 K to 0.223 1'1 at 77 K. The MFS shows a fully linear behavior in the 0.1-100 mT magnetic range. The overall enhancement of 35 times in B min and 4.84 times in S,., and the fact that this MFS is fully CMOS compatible, opens the possibility for. the design and fabrication of monolithic cryogenic CMOS magnetic-field-sensing systems.

Ukrainian Journal of Physics

NUSOD '05. Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic Devices, 2005., 2005

12th International Conference on Microwaves and Radar. MIKON-98. Conference Proceedings (IEEE Cat. No.98EX195), 1998

ABSTRACT

Condensations are produced by solitons in a comet's tail plasma by its interaction with the s... more Condensations are produced by solitons in a comet's tail plasma by its interaction with the solar wind. The conditions of excitation of ion acoustic and dust-acoustic waves are found. The theory presented here focuses on the ion dustacoustic solitons in this magnetized dusty plasma. The density distribution function and potential in these solitons have been obtained. It is shown that the Debye length and the cyclotron radius of charged dust particles define the transverse sizes of dustacoustic solitons. For typical values of the parameters, the estimated sizes of the solitons are several thousand Km, which are in agreement with the observational data.

32nd European Solid-State Device Research Conference, 2002

Optimizing the electromagnetic performance of MOSbased magnetic sensors requires a deep knowledge... more Optimizing the electromagnetic performance of MOSbased magnetic sensors requires a deep knowledge of the electro-magnetic force interaction when the device is exposed to a magnetic field in a cryogenic ambient. Analytical approaches derived from numerical simulations are not appropriated under these conditions. Therefore, we use MINIMOS-NT to perform full 3D physics-based simulations of a two-drain MAGFET. The simulation results match

13th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2000. Conference Proceedings (IEEE Cat. No.00EX428), 2000

The paper investigates the selection of the electromagnetic modes of a dielectric sphere in a com... more The paper investigates the selection of the electromagnetic modes of a dielectric sphere in a compound multilayer resonator of optical frequencies. The waveguide properties of the spherical stack are investigated for systems of optical layers with arbitrary ratio between layer thickness and wavelength. The appropriate matrix formalism is developed. Both the reflection coefficient and the impedance of the stack are calculated. Depending on the number of layers, it is possible to decrease sharply the impedance of the system. It is shown that increasing the number of layers in the stack considerably increases the quality of oscillations. We offer to use such systems in optical communication systems for processing of signals

12th International Conference on Microwaves and Radar. MIKON-98. Conference Proceedings (IEEE Cat. No.98EX195), 1998

ABSTRACT Theoretical investigation of injection problem in powerful quasi-optical modulators is p... more ABSTRACT Theoretical investigation of injection problem in powerful quasi-optical modulators is presented. It is shown that the possibility of increasing current and the level of controlling power is thanks to the optimal regime of injection for surface integrated p-i-n structure with “deep” junctions. The increase of the diffusion coefficient due to existing electromagnetic wave and the criterion of high-power wave are obtained

16th International Conference on Electronics, Communications and Computers (CONIELECOMP'06), 2006

We have shown by simulations a possibility of amplification of space charge waves in strained Si/... more We have shown by simulations a possibility of amplification of space charge waves in strained Si/SiGe heterostructure at 77 K, using the negative differential conductivity phenomenon. In this work we also have done a comparison between the n-GaAs thin film and strained Si/SiGe ...

15th International Conference on Electronics, Communications and Computers (CONIELECOMP'05), 2005

A full comparative study of three models to describe the transport of carrier in GaAs is presente... more A full comparative study of three models to describe the transport of carrier in GaAs is presented. these models were done by Tomizawa, Shur, and Rrodrigues, using the balance equations, where two-valley model in which only the γ-valley and the l-valleys were taken into account. these models have been used to describe the space charge wave propagation in thin n-GaAs films. it has been demonstrated that sometimes the models of Shur and Rodrigues may lead to incorrect results. Essential peculiarities of the Tomizawa's model has been put forward.

2006 International Conference on Microwaves, Radar & Wireless Communications, 2006

ABSTRACT Propagation of exchangeless spin-dipole waves (SDW) in the centimeter (f ~ 3-20 GHz) and... more ABSTRACT Propagation of exchangeless spin-dipole waves (SDW) in the centimeter (f ~ 3-20 GHz) and millimeter (f~ 35-60 GHz) wave ranges in ferrite films in inhomogeneous bias magnetic fields is investigated. It has been shown that electromagnetic retardation influences the dispersion properties of the backward volume SDW at longitudinal wave numbers k les 150 cm-1 in the millimeter wave range. A propagation of SDW in inhomogeneous bias magnetic fields is considered within the framework of complex geometrical optics. A possibility of the transformation of the type of SDW (from surface SDW to backward volume SDW) has been demonstrated both in centimeter and millimeter wave ranges.

(ICEEE). 1st International Conference on Electrical and Electronics Engineering, 2004., 2004

Three-wave nonlinear interactions of space charge waves in thin n-GaAs film, possessing the negat... more Three-wave nonlinear interactions of space charge waves in thin n-GaAs film, possessing the negative differential mobility, are simulated. An effective frequency up-conversion with amplification in millimeter wave range is demonstrated. The Poisson's equation and the set of quasi-hydrodynamic equations have been simulated by the finite difference method. An influence of transverse inhomogeneity in the plane of the film on three-wave interaction in active medium has been investigated.

The 3rd International IEEE-NEWCAS Conference, 2005., 2005

Analog ICs simulations using space charge waves in two-valley semiconductor for microwave and mil... more Analog ICs simulations using space charge waves in two-valley semiconductor for microwave and millimeter range singnal processing is presented. The formulation incorporates the full set of Maxwell's equations and the equations of motion of carriers based on a two-valley fully specified model providing a quantitative description of the space charge waves in thin-film n-GaAs. Numerical solutions to the system of equations indicate that the propagation and amplification of space charge waves in the thin film for four signals with different frequencies is possible. The present formulation can also find application where we need to know the interaction of electromagnetic waves and charge carriers.

Journal of Socio-Economics

ABSTRACT

2004 24th International Conference on Microelectronics (IEEE Cat. No.04TH8716), 2004

An optical single- and multi mode fiber splicing process based on optical beam self-trapping in p... more An optical single- and multi mode fiber splicing process based on optical beam self-trapping in photocurable organic materials with light induced increase of the refractive index is investigated both theoretically and experimentally. The ends of two optical fiber cables to be spliced are immersed in a photocurable material with a gap maintained between them. The terminal ends of individual fibers

This report is devoted to the experimental and theoretical aspects of the nonlinear interaction a... more This report is devoted to the experimental and theoretical aspects of the nonlinear interaction and influence of the acoustic waves on the ionosphere. This nonlinear phenomenon gives the possibility to simulate the acoustic channel of the lithosphere-atmosphere-ionosphere connection, and to investigate experimentally this channel by means of acoustic generators located on the earth surface. The increase of the transparency of the ionosphere for the cosmic radiowaves caused by a low frequency atmospheric acoustic wave is investigated. Atmospheric acoustic wave creates in the ionosphere a periodic structure of the electron density, like the one created by using two high-power radiowave signals. It is shown that if the length of the acoustic wave is equal or larger than the radiowave length, then a resonant transmission of the radiowaves takes place in the ionosphere.

Journal of Socio-Economics

This paper reports theoretical and experimental results of passive microwave antennas based on si... more This paper reports theoretical and experimental results of passive microwave antennas based on silicon P-I-N structure and ferroelectric ceramics suitable for passive communication with a descending cosmic object.

In this paper the electrical performance of submicron MOS transistors at low temperatures is expl... more In this paper the electrical performance of submicron MOS transistors at low temperatures is explored. This way we found that second-order effects like; the bias dependent series resistance, the second substrate current hump and some others, are amplified allowing so an easier way to study them and to determine their physical origin.

A silicon magnetic field sensor (MFS) has been tested from 300 K down to 77 K. At 77 K the minimu... more A silicon magnetic field sensor (MFS) has been tested from 300 K down to 77 K. At 77 K the minimum detectable magnetic field B i n is 100 J1T compared to 3.5 mT at 300 K. m The relative magnetic sensitivity Sr increases from 0.046 1'1 at 300 K to 0.223 1'1 at 77 K. The MFS shows a fully linear behavior in the 0.1-100 mT magnetic range. The overall enhancement of 35 times in B min and 4.84 times in S,., and the fact that this MFS is fully CMOS compatible, opens the possibility for. the design and fabrication of monolithic cryogenic CMOS magnetic-field-sensing systems.

Ukrainian Journal of Physics

NUSOD '05. Proceedings of the 5th International Conference on Numerical Simulation of Optoelectronic Devices, 2005., 2005

12th International Conference on Microwaves and Radar. MIKON-98. Conference Proceedings (IEEE Cat. No.98EX195), 1998

ABSTRACT

Condensations are produced by solitons in a comet's tail plasma by its interaction with the s... more Condensations are produced by solitons in a comet's tail plasma by its interaction with the solar wind. The conditions of excitation of ion acoustic and dust-acoustic waves are found. The theory presented here focuses on the ion dustacoustic solitons in this magnetized dusty plasma. The density distribution function and potential in these solitons have been obtained. It is shown that the Debye length and the cyclotron radius of charged dust particles define the transverse sizes of dustacoustic solitons. For typical values of the parameters, the estimated sizes of the solitons are several thousand Km, which are in agreement with the observational data.

2008 7th International Caribbean Conference on Devices, Circuits and Systems, 2008

ABSTRACT