Browsing by Author "Haakenaasen, Randi"
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Characterization of (111)B and (211)B CdZnTe Substrates for HgCdTe Growth
Haakenaasen, Randi; Lauten, Oda; Selvig, Espen; Kongshaug, Kjell Ove; Røer, Eivind Jülke; Hansen, Runar Wattum (2019-06-13)We have studied state-of-the-art CdZnTe (211)B and (111)B substrates and compared them to each other and to substrates from an alternative vendor. The CdZnTe surface has been characterized both as-received and after growth ... -
Descending Infrared Transmission Spectra of CdZnTe Substrates Due to Surface Roughness
Selvig, Espen; Kongshaug, Kjell Ove; Haakenaasen, Randi; Lorentzen, Torgeir; Brudevoll, Trond (2019-06-11)(111)B-oriented Cd0.96Zn0.04Te substrates with rough surfaces have been found to have infrared (IR) transmission spectra which decrease rapidly in intensity as the photon energy increases. The rough surfaces were produced ... -
Effect of the Series Resistance on the Current Response of a HgCdTe Avalanche Photodiode Under High-intensity Nanosecond Irradiation
Storebø, Asta Katrine; Brudevoll, Trond; Selvig, Espen; Hansen, Runar Wattum; Lorentzen, Torgeir; Haakenaasen, Randi (2022-05-10)We investigate the nonlinear signal current response of a Hg0.72Cd0.28Te avalanche photodiode (APD) irradiated by high-intensity, finite-duration laser pulses. At high irradiation levels and/or high gains, carrier-induced ... -
Enhancement in Light Emission From Hg-Cd-Te Due to Surface Patterning
Tonheim, Celin Russøy; Sudbø, Aasmund Sveinung; Selvig, Espen; Haakenaasen, Randi (2011)Enhancement of light emission from HgCdTe due to surface patterning has been studied by means of photoluminescence (PL) spectroscopy. A triangular pattern of circular holes was etched into the CdTe layer grown on top of ... -
Improved Passivation Effect Due to Controlled Smoothing of the CdTe-HgCdTe Interface Gradient by Thermal Annealing
Haakenaasen, Randi; Selvig, Espen; Heier, Anne Cathrine; Lorentzen, Torgeir; Trosdahl-Iversen, Laila (2019-07-11)HgCdTe films grown by liquid phase epitaxy were passivated with CdTe grown by molecular beam epitaxy. A series of annealing tests with different temperatures and durations were then carried out in order to reach a two-fold ...