A
Angela Sobiesierski
Researcher at Cardiff University
Publications - 30
Citations - 812
Angela Sobiesierski is an academic researcher from Cardiff University. The author has contributed to research in topics: Quantum dot laser & Semiconductor laser theory. The author has an hindex of 7, co-authored 29 publications receiving 677 citations.
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Journal ArticleDOI
Electrically pumped continuous-wave III–V quantum dot lasers on silicon
Siming Chen,Wei Li,Jiang Wu,Qi Jiang,Mingchu Tang,Samuel Shutts,Stella N. Elliott,Angela Sobiesierski,Alwyn J. Seeds,Ian M. Ross,Peter Michael Smowton,Huiyun Liu +11 more
TL;DR: In this paper, the authors demonstrate continuous-wave InAs/GaAs quantum dot lasers directly grown on silicon substrates with a low threshold current density of 62.5 cm−2, a room-temperature output power exceeding 105mW and operation up to 120°C.
Journal ArticleDOI
In situ annealing enhancement of the optical properties and laser device performance of InAs quantum dots grown on Si substrates
Jonathan R. Orchard,Samuel Shutts,Angela Sobiesierski,Jiang Wu,Mingchu Tang,Siming Chen,Qi Jiang,Stella N. Elliott,Richard Beanland,Huiyun Liu,Peter Michael Smowton,D. J. Mowbray +11 more
TL;DR: The addition of elevated temperature steps (annealing) during the growth of InAs/GaAs quantum dot (QD) structures on Si substrates results in significant improvements in their structural and optical properties and laser device performance.
Journal ArticleDOI
Fabrication of high-aspect-ratio, sub-micron gratings in AlGaInP/GaAs laser structures using a BCl3 /Cl2 /Ar inductively coupled plasma
TL;DR: In this article, a process for fabricating deep-etched nanostructures in AlGaInP and GaAs using a BCl3/Cl2/Ar inductively coupled plasma (ICP) is reported.
Journal ArticleDOI
Femtosecond pulse generation in passively mode locked InAs quantum dot lasers
P. Finch,Peter Blood,Peter Michael Smowton,Angela Sobiesierski,Russell M. Gwilliam,I. O'Driscoll +5 more
TL;DR: In this paper, an InAs two-section passively mode-locked quantum dot laser with a proton bombarded absorber section was shown to reduce optical pulse durations by a factor of 29, with a corresponding increase in optical bandwidth.
Journal ArticleDOI
Modeling multiple quantum barrier effects and reduced electron leakage in red-emitting laser diodes
M. R. Brown,Richard J. Cobley,Kar Seng Teng,Paul Rees,Steve P. Wilks,Angela Sobiesierski,Peter Michael Smowton,Peter Blood +7 more
TL;DR: In this article, a multi-quantum-barrier (MQB) structure able to inhibit both Γ-and X-band transmissions is inserted in the p-doped region adjacent to the active region of the device.