@article{3bf342256a4b4d1294444b988fe7f405,
title = "Improving performance of gaas-based vertical-cavity surface- emitting lasers by employing thermally conductive metal substrate",
abstract = "We investigated the effect of the conducting substrate on the performance of GaAs-based VCSELs, where the substrates were 230 μm-GaAs (reference), 10 μm-GaAs/metal, and 0.5 μm-GaAs/metal. The VCSELs with the 10 μm- and 0.5 μm thick GaAs/metal-substrates produced higher light output power than the reference. For example, the thin GaAs/metal substrate samples showed 16.3%-16.7% higher light output power at 3.0 A than the reference. It was shown that the thin GaAs samples produced 12.2%-14.0% higher power conversion efficiency at 3.0 A than the reference. At a high current region, the metal-substrate samples yielded lower junction temperature than the reference, namely, the thin GaAs samples gave 42 °C-47.4 °C lower junction temperature at 2.0 A than the reference. Further, the thin GaAs samples revealed better light output degradation characteristics than the reference. For instance, the light output of the reference was degraded by 30.2% at 85 °C, whereas the thin GaAs samples were degraded by 20.1%-20.5%. Near-field images and emission profiles demonstrated that the metal-substrate samples suffered from no damage incurred during the VCSEL fabrication process. ",
author = "Yum, {Woong Sun} and Lee, {Sang Youl} and Kim, {Myung Sub} and Yoon, {Su Jung} and Oh, {Jeong Tak} and Jeong, {Hwan Hee} and Seong, {Tae Yeon}",
note = "Funding Information: Acknowledgements We would like to thank S. Tsai, J. Rosen, L. Donehower, M. Brenner and B. Deneen for their editorial suggestions, and grant funding from the National Cancer InstituteCA129640, CA175397, V Scholar Award, Dan L Duncan Career Award, and Bladder Cancer Partnership (K.S.C.), CPRIT pre-doctoral fellowship RP101499 (A.V.K.), AUA Research Scholar Award (P.L.H.) and CPRIT training grant RP140102 for SMART program (T.T.R.). This work is supported by the Genomic & RNA Profiling Core (L. White), Cytometry & Cell Sorting Core (NIAID AI036211, NCI CA125123 and RR024574; J. Sederstorm), and Human Tissue Acquisition & Pathology Core (NCI CA125123; M. Ittmann) at Baylor College of Medicine, the Texas Advanced Computing Center at UT Austin and Rice University for providing High Performance Computing resources. We dedicate this work to the memory of J. Pride (a patient with bladder cancer and friendof I. Weissman), who fundedthe original work of K.S.C., which served as an important foundation leading to the current study. Publisher Copyright: {\textcopyright} 2021 The Electrochemical Society.",
year = "2021",
month = jan,
doi = "10.1149/2162-8777/abd886",
language = "English",
volume = "10",
journal = "ECS Journal of Solid State Science and Technology",
issn = "2162-8769",
publisher = "Electrochemical Society, Inc.",
number = "1",
}