Engineering topics

Dowd, P.

Publications and source records attributed to Dowd, P..

3 records

NASA NTRS2000

Changes in luminescence emission induced by proton irradiation: InGaAs/GaAs quantum wells and quantum dots

The photoluminescence emission from InGaAs/GaAs quantum-well and quantum-dot (QD) structures are compared after controlled irradiation with 1.5 MeV proton fluxes. Results presented here show a significant enhancement in radiation tolerance with three-dimensional quantum confinement.

Radiation recombination heterostructures transform↗

NASA NTRS2000

Radiation Effects in Nanostructures: Comparison of Proton Irradiation Induced Changes on Quantum Dots and Quantum Wells

Successful implementation of technology using self-forming semiconductor Quantum Dots (QDs) has already demonstrated that temperature independent Dirac-delta density of states can be exploited in low current threshold QD lasers and QD infrared photodetectors.

nanostructures space reliability radiation effects↗

NASA NTRS1999

Proton Induced Optical Degradation in InGaAs/GaAs Quantum Confined Structures

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radiation damage quantum dots photoluminescence↗