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Highly sensitive hot electron bolometer based on disordered graphene

A bolometer is a device that makes an electrical resistive response to the electromagnetic radiation resulted from a raise of temperature due to heating. The combination of the extremely weak electron-phonon interactions along with its small electron heat capacity makes graphene an ideal material fo...

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Detalles Bibliográficos
Autores principales: Han, Qi, Gao, Teng, Zhang, Rui, Chen, Yi, Chen, Jianhui, Liu, Gerui, Zhang, Yanfeng, Liu, Zhongfan, Wu, Xiaosong, Yu, Dapeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3866633/
https://www.ncbi.nlm.nih.gov/pubmed/24346418
http://dx.doi.org/10.1038/srep03533
Descripción
Sumario:A bolometer is a device that makes an electrical resistive response to the electromagnetic radiation resulted from a raise of temperature due to heating. The combination of the extremely weak electron-phonon interactions along with its small electron heat capacity makes graphene an ideal material for applications in ultra-fast and sensitive hot electron bolometer. However, a major issue is that the resistance of pristine graphene weakly depends on the electronic temperature. We propose using disordered graphene to obtain a strongly temperature dependent resistance. The measured electrical responsivity of the disordered graphene bolometer reaches 6 × 10(6) V/W at 1.5 K, corresponding to an optical responsivity of 1.6 × 10(5) V/W. The deduced electrical noise equivalent power is 1.2 [Image: see text], corresponding to the optical noise equivalent power of 44 [Image: see text]. The minimal device structure and no requirement for high mobility graphene make a step forward towards the applications of graphene hot electron bolometers.