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Papers by Dennis Hall

Optics and Photonics News, 1990

Materials Science and Engineering: B, 1989

Abstract We establish that two deep photoluminescence (PL) systems in Si: S arise from the decay ... more Abstract We establish that two deep photoluminescence (PL) systems in Si: S arise from the decay of isoelectronic bound excitons (IBEs) at two metastable configurations of the constituents of a single defect. Each system has two principal zero-phonon lines. We ...

Integrated Optics III, 1983

The discovery of surface-enhanced Raman scattering (SERS) has generated widespread activity on tw... more The discovery of surface-enhanced Raman scattering (SERS) has generated widespread activity on two fronts: 1) investigations of the physical mechanisms responsible for SERS, and 2) applications of those mechanisms to intensify other optical processes. The term SERS refers to the phenomenon in which the normally weak Stokes-shifted Raman signal from a molecular monolayer is increased by factors of 106 or more when the molecular layer is placed on a suitably roughened metal substrate. It is now rather widely believed that SERS is caused by an interaction between the molecule and localized plasma resonances (LPR) in the roughened substrate. The LPR are oscillations of the conduction electrons within the "bumps on the roughened substrate, and are excited by an incident optical beam. The LPR develop very strong surface electric fields; a molecule placed in close proximity to the "bumps" interacts with the strong field of the LPR giving rise to the enhanced Raman scattering.

Optics Communications, 1991

Abstract The neglect of certain second derivatives in an often used derivation of the coupled-mod... more Abstract The neglect of certain second derivatives in an often used derivation of the coupled-mode equations is unnecessary, as pointed out in 1979 by Sipe et al., and more recently by Crosignani et al. A derivation that begins with the wave equation rather than directly with Maxwell's equations is illustrated.

Optics Letters, 1981

The scattering of optical guided waves by waveguide surface roughness has been analyzed in three ... more The scattering of optical guided waves by waveguide surface roughness has been analyzed in three dimensions. The scattered fields were determined by satisfying the boundary conditions to first order in the height of the surface roughness. The utility of the theory for practical problems is illustrated by developing explicit formulas for the power radiated by a TE guided wave into the medium above the planar waveguide. These formulas are expressed in terms of the surface autocorrelation function.

Journal of the Optical Society of America A, 1995

Page 1. 84 J. Opt. Soc. Am. A/Vol. 12, No. 1/January 1995 RH Jordan and DG Hall Highly directiona... more Page 1. 84 J. Opt. Soc. Am. A/Vol. 12, No. 1/January 1995 RH Jordan and DG Hall Highly directional surface emission from concentric-circle gratings on planar optical waveguides: the f ield expansion method Rebecca H. Jordan and Dennis G. Hall ...

Computer, 1987

Several integrated optical systems have been proposed and demonstrated which employ a simple, Si-... more Several integrated optical systems have been proposed and demonstrated which employ a simple, Si-based optical waveguide geometry. Since it is difficult to find a material with a refractive index greater than the 3.5 of silicon, it is necessary to grow a layer of SiO2, with the much lower refractive index value of about 1.46, on the silicon substrate before depositing

Semiconductors and Semimetals

ABSTRACT

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures

2975 King et at; Curved grating fabrication techniques 2375 CCGSE OUTPUT (8175 A 0 25 65 85 %AI A... more 2975 King et at; Curved grating fabrication techniques 2375 CCGSE OUTPUT (8175 A 0 25 65 85 %AI AIGaAs UPPER CLAD GaAs QUANTUM WELL ■ AIGaAs CORE AIGaAs LOWER CLAD GaAs SUBSTRATE Deoth Fio. í . Schematic drawing of the CCGSE laser structure. The ...

Optics and Photonics News, 1990

Materials Science and Engineering: B, 1989

Abstract We establish that two deep photoluminescence (PL) systems in Si: S arise from the decay ... more Abstract We establish that two deep photoluminescence (PL) systems in Si: S arise from the decay of isoelectronic bound excitons (IBEs) at two metastable configurations of the constituents of a single defect. Each system has two principal zero-phonon lines. We ...

Integrated Optics III, 1983

The discovery of surface-enhanced Raman scattering (SERS) has generated widespread activity on tw... more The discovery of surface-enhanced Raman scattering (SERS) has generated widespread activity on two fronts: 1) investigations of the physical mechanisms responsible for SERS, and 2) applications of those mechanisms to intensify other optical processes. The term SERS refers to the phenomenon in which the normally weak Stokes-shifted Raman signal from a molecular monolayer is increased by factors of 106 or more when the molecular layer is placed on a suitably roughened metal substrate. It is now rather widely believed that SERS is caused by an interaction between the molecule and localized plasma resonances (LPR) in the roughened substrate. The LPR are oscillations of the conduction electrons within the "bumps on the roughened substrate, and are excited by an incident optical beam. The LPR develop very strong surface electric fields; a molecule placed in close proximity to the "bumps" interacts with the strong field of the LPR giving rise to the enhanced Raman scattering.

Optics Communications, 1991

Abstract The neglect of certain second derivatives in an often used derivation of the coupled-mod... more Abstract The neglect of certain second derivatives in an often used derivation of the coupled-mode equations is unnecessary, as pointed out in 1979 by Sipe et al., and more recently by Crosignani et al. A derivation that begins with the wave equation rather than directly with Maxwell's equations is illustrated.

Optics Letters, 1981

The scattering of optical guided waves by waveguide surface roughness has been analyzed in three ... more The scattering of optical guided waves by waveguide surface roughness has been analyzed in three dimensions. The scattered fields were determined by satisfying the boundary conditions to first order in the height of the surface roughness. The utility of the theory for practical problems is illustrated by developing explicit formulas for the power radiated by a TE guided wave into the medium above the planar waveguide. These formulas are expressed in terms of the surface autocorrelation function.

Journal of the Optical Society of America A, 1995

Page 1. 84 J. Opt. Soc. Am. A/Vol. 12, No. 1/January 1995 RH Jordan and DG Hall Highly directiona... more Page 1. 84 J. Opt. Soc. Am. A/Vol. 12, No. 1/January 1995 RH Jordan and DG Hall Highly directional surface emission from concentric-circle gratings on planar optical waveguides: the f ield expansion method Rebecca H. Jordan and Dennis G. Hall ...

Computer, 1987

Several integrated optical systems have been proposed and demonstrated which employ a simple, Si-... more Several integrated optical systems have been proposed and demonstrated which employ a simple, Si-based optical waveguide geometry. Since it is difficult to find a material with a refractive index greater than the 3.5 of silicon, it is necessary to grow a layer of SiO2, with the much lower refractive index value of about 1.46, on the silicon substrate before depositing

Semiconductors and Semimetals

ABSTRACT

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures

2975 King et at; Curved grating fabrication techniques 2375 CCGSE OUTPUT (8175 A 0 25 65 85 %AI A... more 2975 King et at; Curved grating fabrication techniques 2375 CCGSE OUTPUT (8175 A 0 25 65 85 %AI AIGaAs UPPER CLAD GaAs QUANTUM WELL ■ AIGaAs CORE AIGaAs LOWER CLAD GaAs SUBSTRATE Deoth Fio. í . Schematic drawing of the CCGSE laser structure. The ...

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