{"title":"Thermal Management of GaAs/AlGaAs VCSELs by Optimizing MHCG and DBR Hybrid Reflectors","authors":"Hassan Hooshdar Rostami, V. Ahmadi, S. Pahlavan","doi":"10.1109/IICM57986.2022.10152422","DOIUrl":null,"url":null,"abstract":"In this paper, a self-consistent three-dimensional finite element method is used for the electro-thermal analysis of a VCSEL structure with a hybrid reflector based on monolithic high-contrast gratings (MHCG). A GaAs/AlGaAs VCSEL with a lasing wavelength of 980 nm, diameter of 31 µm and an aperture diameter of 16.5 µm with an MHCG and DBR hybrid reflector with reflectivity of 99.99% is studied, and the temperature distribution in the device is obtained. Also, the impact of utilizing MHCG in the reflector on the temperature peak is shown. The proposed structure is compared with a conventional VCSEL, and it is demonstrated that utilizing a hybrid reflector reduces the temperature peak by up to 8K. The effect of the MHCG duty cycle and thickness on VCSEL's electro-thermal characteristics is also investigated.","PeriodicalId":131546,"journal":{"name":"2022 Iranian International Conference on Microelectronics (IICM)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2022 Iranian International Conference on Microelectronics (IICM)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IICM57986.2022.10152422","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, a self-consistent three-dimensional finite element method is used for the electro-thermal analysis of a VCSEL structure with a hybrid reflector based on monolithic high-contrast gratings (MHCG). A GaAs/AlGaAs VCSEL with a lasing wavelength of 980 nm, diameter of 31 µm and an aperture diameter of 16.5 µm with an MHCG and DBR hybrid reflector with reflectivity of 99.99% is studied, and the temperature distribution in the device is obtained. Also, the impact of utilizing MHCG in the reflector on the temperature peak is shown. The proposed structure is compared with a conventional VCSEL, and it is demonstrated that utilizing a hybrid reflector reduces the temperature peak by up to 8K. The effect of the MHCG duty cycle and thickness on VCSEL's electro-thermal characteristics is also investigated.
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