• Preparation of MOCVD-Grown Pho...

Treffer: Preparation of MOCVD-Grown Photocathodes Containing a Strained GaAs/GaAsP Superlattice

Title:
Preparation of MOCVD-Grown Photocathodes Containing a Strained GaAs/GaAsP Superlattice
Authors:
Blume, G., Masters, A., Grames, J., Stutzman, M., Grau, M., Marsillac, S.
Source:
Physics Faculty Publications
Publisher Information:
ODU Digital Commons
Publication Year:
2025
Collection:
Old Dominion University: ODU Digital Commons
Subject Terms:
Chemical cleaning, Fabrication, Gallium arsenide, Metal cleaning, Metallorganic chemical vapor deposition, Molecular beam epitaxy, Optical waveguides, Polarization, Quantum efficiency, Superlattices, Electrical and Computer Engineering, Engineering Physics, Metallurgy
Document Type:
Konferenz conference object
File Description:
application/pdf
Language:
unknown
Relation:
https://digitalcommons.odu.edu/physics_fac_pubs/971; https://digitalcommons.odu.edu/context/physics_fac_pubs/article/1974/viewcontent/Blume_2025_PreparationofMOCVD_GrownPhotocathodesOCR.pdf
DOI:
10.22323/1.472.0071
Availability:
https://digitalcommons.odu.edu/physics_fac_pubs/971
https://doi.org/10.22323/1.472.0071
https://digitalcommons.odu.edu/context/physics_fac_pubs/article/1974/viewcontent/Blume_2025_PreparationofMOCVD_GrownPhotocathodesOCR.pdf
Rights:
© 2025 The Authors. Copyright owned by the authors under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) License .
Accession Number:
edsbas.2AC435CC
Database:
BASE

Weitere Informationen

In this work, we investigate heat cleaning options for high-polarization GaAs/GaAsP strained-superlattice (SSL) photocathodes with a distributed Bragg reflector (DBR) that were grown using metalorganic chemical vapor deposition (MOCVD). This was done using a microMott polarimeter at Jefferson Lab to optimize both quantum efficiency and polarization. The fabrication process for MOCVD-grown photocathodes does not allow for the inclusion of an arsenic cap, contrary to what is done when fabricating photocathodes using molecular-beam epitaxy (MBE). Without proper preparation, the performance of MOCVD-grown photocathodes can be limited due to surface contamination. Here, we varied both duration and temperature of the heat cleaning process and observed increased quantum efficiency with negligible loss of polarization. Results of the optimized cleaning process in addition to upgrades to the testing apparatus are presented.