Browsing by Author "Pastor, David"
Now showing items 1-6 of 6
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Carrier Dynamics and Absorption Properties of Gold-Hyperdoped Germanium: Insight Into Tailoring Defect Energetics
Dissanayake, Sashini Senali; Ferdous, Naheed; Gandhi, Hemi H.; Pastor, David; Tran, Tuan T.; Williams, Jim S.; Aziz, Michael; Mazur, Eric; Ertekin, Elif; Sher, Meng-Ju (American Physical Society (APS), 2021-06-23)Hyperdoping germanium with gold is a potential method to produce room-temperature short-wavelength-infrared radiation (SWIR; 1.4–3.0 μm) photodetection. We investigate the charge carrier dynamics, light absorption, and ... -
Chalcogen-hyperdoped germanium for short-wavelength infrared photodetection
Gandhi, Hemi H.; Pastor, David; Tran, Tuan T.; Kalchmair, Stefan; Smillie, Lachlan A.; Mailoa, Jonathan P.; Milazzo, Ruggero; Napolitani, Enrico; Loncar, Marko; Williams, James S.; Aziz, Michael; Mazur, Eric (AIP Publishing, 2020-07-01)Obtaining short-wavelength-infrared (SWIR; 1.4 μm–3.0 μm) room-temperature photodetection in a low-cost, group IV semiconductor is desirable for numerous applications. We demonstrate a non-equilibrium method for hyperdoping ... -
Gold-Hyperdoped Germanium with Room-Temperature Sub-Band-Gap Optoelectronic Response
Gandhi, Hemi H.; Pastor, David; Tran, Tuan T.; Kalchmair, Stefan; Smilie, L.A.; Mailoa, Jonathan P.; Milazzo, Ruggero; Napolitani, Enrico; Loncar, Marco; Williams, James S.; Aziz, Michael; Mazur, Eric (American Physical Society (APS), 2020-12-16) -
Ion-beam synthesis and thermal stability of highly tin-concentrated germanium – tin alloys
Tran, Tuan T.; Gandhi, Hemi H.; Pastor, David; Aziz, Michael J.; Williams, J.S. (Elsevier BV, 2017)A 9 at% Sn Ge-Sn alloy of good crystalline quality has been achieved by ion implantation followed by pulsed laser melting and resolidification. The concentration and crystallinity of the alloys are fully characterised by ... -
Simultaneous high crystallinity and sub-bandgap optical absorptance in hyperdoped black silicon using nanosecond laser annealing
Franta, Benjamin Andrew; Pastor, David; Gandhi, Hemi H.; Rekemeyer, Paul H.; Gradečak, Silvija; Aziz, Michael J.; Mazur, Eric (AIP Publishing, 2015)Hyperdoped black silicon fabricated with femtosecond laser irradiation has attracted interest for applications in infrared photodetectors and intermediate band photovoltaics due to its sub-bandgap optical absorptance and ... -
Suppression of ion-implantation induced porosity in germanium by a silicon dioxide capping layer
Tran, Tuan; Alkhaldi, Huda; Gandhi, Hemi; Pastor, David; Huston, Larissa; Wong-Leung, Jennifer; Aziz, Michael; Williams, J. (AIP Publishing, 2016-08-22)