The global warming issues associated with fossil fuels have forced the world to shift towards environment-friendly alternatives. The studies on the capture and storage of CO<sub>2</sub> have gained signifi...The global warming issues associated with fossil fuels have forced the world to shift towards environment-friendly alternatives. The studies on the capture and storage of CO<sub>2</sub> have gained significant research attention, and to attract the world towards CO<sub>2</sub> capturing and storing, it is necessary to find suitable applications for this captured CO<sub>2</sub>. Methanol is one of the products which can be produced by utilizing the captured CO<sub>2</sub> and hydrogen that can be produced by water splitting. Keeping in view both these green fuel production processes, this study proposes a combined application of both these technologies for the production of methanol, which is an important chemical used in manufacturing industries. This review paper presents a brief study of both carbon capture and hydrogen production technologies. It also provides research trends, economic aspects, and methods of incorporating both these technologies to produce methanol. Additionally, the prospects of the approach in Oman have also been presented.展开更多
Monolithic integration of quantum dot(QD)gain materials onto Si photonic platforms via direct epitaxial growth is a promising solution for on-chip light sources.Recent developments have demonstrated superior device re...Monolithic integration of quantum dot(QD)gain materials onto Si photonic platforms via direct epitaxial growth is a promising solution for on-chip light sources.Recent developments have demonstrated superior device reliability in blanket hetero-epitaxy ofⅡ-Ⅴdevices on Si at elevated temperatures.Yet,thick,defect management epi designs prevent vertical light coupling from the gain region to the Si-on-lnsulator waveguides.Here,we demonstrate the frst electrically pumped QD lasers grown by molecular beam epitaxy on a 300 mm patterned(001)Si wafer with a buttcoupled configuration.Unique growth and fabrication challenges imposed by the template architecture have been resolved,contributing to continuous wave lasing to 60℃and a maximum double-side output power of 126.6 mW at 20℃with a double-side wall-plug efficiency of 8.6%.The potential for robust on-chip laser operation and effcient lowloss light coupling to Si photonic circuits makes this heteroepitaxial integration platform on Si promising for scalable and low-cost mass production.展开更多
文摘The global warming issues associated with fossil fuels have forced the world to shift towards environment-friendly alternatives. The studies on the capture and storage of CO<sub>2</sub> have gained significant research attention, and to attract the world towards CO<sub>2</sub> capturing and storing, it is necessary to find suitable applications for this captured CO<sub>2</sub>. Methanol is one of the products which can be produced by utilizing the captured CO<sub>2</sub> and hydrogen that can be produced by water splitting. Keeping in view both these green fuel production processes, this study proposes a combined application of both these technologies for the production of methanol, which is an important chemical used in manufacturing industries. This review paper presents a brief study of both carbon capture and hydrogen production technologies. It also provides research trends, economic aspects, and methods of incorporating both these technologies to produce methanol. Additionally, the prospects of the approach in Oman have also been presented.
基金We thank W.Jin,Z.Zhang,J.C.Norman,M.Dumont,MJ.Kennedy,and C.Xiang for useful discussions and help with the fabrication and testing.This material is based on research sponsored by Defense Advanced Research Projects Agency(No.HR0011-20-C-0142)Air Force Research Laboratory under AIM Photonics(agreement number FA8650-21-2-1000).
文摘Monolithic integration of quantum dot(QD)gain materials onto Si photonic platforms via direct epitaxial growth is a promising solution for on-chip light sources.Recent developments have demonstrated superior device reliability in blanket hetero-epitaxy ofⅡ-Ⅴdevices on Si at elevated temperatures.Yet,thick,defect management epi designs prevent vertical light coupling from the gain region to the Si-on-lnsulator waveguides.Here,we demonstrate the frst electrically pumped QD lasers grown by molecular beam epitaxy on a 300 mm patterned(001)Si wafer with a buttcoupled configuration.Unique growth and fabrication challenges imposed by the template architecture have been resolved,contributing to continuous wave lasing to 60℃and a maximum double-side output power of 126.6 mW at 20℃with a double-side wall-plug efficiency of 8.6%.The potential for robust on-chip laser operation and effcient lowloss light coupling to Si photonic circuits makes this heteroepitaxial integration platform on Si promising for scalable and low-cost mass production.
