Titlebook: Optoelectronic Properties of Graphene-Based van der Waals Hybrids; Kallol Roy Book 2020 Springer Nature Switzerland AG 2020 Single Photon

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2190-5053 utilized in various optoelectronic applications including biomedical sensing, astronomical sensing, optical communications, optical quantum information processing and in applications requiring low intensity photodetection and number resolved single photon detection. .978-3-030-59629-3978-3-030-59627-9Series ISSN 2190-5053 Series E-ISSN 2190-5061

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Material and Heterostructure Interface Characterization,e is presented, which considers the presence of an interfacial electric field inside . due to Schottky barrier formation. A correlation between optical and electrical response is established which supports the charge transfer model applicable to graphene-. interface.

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Experimental Techniques, Instruments, and Cryostat,ronic experiments, and software codes are written on various platforms (e.g. ., ., Origin) to record and analyse experimental data etc. Detail informations related to all such developments are mentioned in this chapter.

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Switching Operation with Graphene-on-MoS, Heterostructures, controlled memory operations have been demonstrated. The operations are also extended with the devices made of chemical vapour deposition (CVD) grown garphene showing the scalability of such devices. Various other details such as, room temperature operations, theoretical modelling of charge retention mechanism etc. have been demonstrated.

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Number Resolved Single Photon Detection, measures were taken to tune the gain. For example, a short channel device is used to increase photogain etc. This chapter discusses detailed characterisation of a number-resolved single photon detector made of BLG-on-. structures. Histogram of photon statistics confirming the photon number resolution is also presented.

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,Various Graphene, MoS, Devices and Room Temperature Operations,de of large area CVD-graphene decorated with small . flakes. In last section, characteristics of a vertical phototransistor is demonstrated with graphene-.-graphene stacking sequence. All these studies elaborate various possible scheme of photodetection with graphene and

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