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Your search keyword '"M. T. Crowley"' showing total 2 results
Start Over Author "M. T. Crowley" Publisher iop publishing
2 results on '"M. T. Crowley"'

1. Long wavelength transverse magnetic polarized absorption in 1.3 µm InAs/InGaAs dots-in-a-well type active regions

Author

Susannah C. Heck, M. T. Crowley, Eoin P. O'Reilly, Stefan Schulz, S.B. Healy, Simon Osborne, and D.P. Williams

Subjects
Physics, Electron, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Symmetry (physics), Electronic, Optical and Magnetic Materials, Transverse magnetic, Long wavelength, Excited state, Materials Chemistry, Electrical and Electronic Engineering, Atomic physics, Absorption (electromagnetic radiation), Ground state
Abstract

Edge-photovoltage measurements of InAs/GaAs 1.3 µm dot-in-a-well structures clearly show a ground state (GS) transverse magnetic (TM) absorption. Based on eight-band k.p calculations we attribute this GS TM absorption peak to transitions between GS electrons and low-lying excited hole states which possess a significant light-hole component of the correct symmetry to recombine with the GS electrons.

Published
2012

2. Modelling the spectral emission of multi-section quantum dot superluminescent light-emitting diodes

Author

Luke F. Lester, Bjørn-Ove Fimland, Nader A. Naderi, Tron Arne Nilsen, M. T. Crowley, M El Emawy, T. A. Saiz, Sayan D. Mukherjee, and N. Patel

Subjects
Physics, Amplified spontaneous emission, business.industry, Semiconductor device, Condensed Matter Physics, Superluminescent diode, Electronic, Optical and Magnetic Materials, law.invention, Section (fiber bundle), Optics, Quantum dot, law, Materials Chemistry, Optoelectronics, Spontaneous emission, Light emission, Electrical and Electronic Engineering, business, Light-emitting diode
Abstract

By characterizing the light emission from a multi-section reconfigurable quantum dot (QD) edge-emitting LED, measured gain and unamplified spontaneous emission characteristics pertaining to the underlying gain material can be determined. This data can then be inserted into a set of equations capable of reproducing the spectral emission when the device is configured as a superluminescent diode (SLD). The accuracy of this model is validated for a highly p-doped QD multi-section LED. Excellent agreement is obtained between the model and the actual measured light output from the QD SLD.

Published
2012

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