Pitfalls in Determining the Electrical Bandwidth of Nonideal Nanomaterials for Photodetection
Christine Schedel, Fabian Strauß, Marcus Scheele
Abstract
The electrical 3 dB bandwidth is regularly used as a measure for the response speed of a photodetector and is estimated via various approaches in literature, ranging from direct measurements to gauged values via approximations. Great care must be taken when comparing these 3 dB bandwidths, since approximations are only strictly valid for ideal circuits. This paper demonstrates that for typical photodetectors based on new emerging nanostructured materials, namely, quantum dots and transition metal dichalcogenides, the bandwidth can deviate up to 103 depending on the chosen approach for the bandwidth specification.
Topics & Concepts
PhotodetectionPhotodetectorBandwidth (computing)RangingElectronic circuitComputer scienceNanomaterialsBandwidth extensionQuantumMeasure (data warehouse)Electronic engineeringOptoelectronicsPhysicsMaterials scienceNanotechnologyTelecommunicationsQuantum mechanicsEngineeringDatabaseSpeech codingAudio signalQuantum Dots Synthesis And PropertiesChalcogenide Semiconductor Thin Films2D Materials and Applications