Sensitivity characterization of a photomultiplier tube for terahertz radiation

In this work, we present the first sensitivity characterization of a photomultiplier tube (PMT) for the detection of terahertz (THz) radiation. The PMT holds a metasurface-based photocathode that emits electrons via the electron field emission effect. This leads to a very non-linear detector that al...

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Bibliographic Details
Published in:	2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz) p. 1
Main Authors:	Lange, Simon L., Lasse Welsch, Malte, Kawai, Naoya, Jepsen, Peter U.
Format:	Conference Proceeding
Language:	English
Published:	IEEE 29-08-2021
Subjects:	Cathodes Detectors Electron tubes Photomultipliers Sensitivity Terahertz radiation
Online Access:	Get full text
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Summary:	In this work, we present the first sensitivity characterization of a photomultiplier tube (PMT) for the detection of terahertz (THz) radiation. The PMT holds a metasurface-based photocathode that emits electrons via the electron field emission effect. This leads to a very non-linear detector that allows one to see much smaller variations of an incident signal than the absolute signal strength itself. We find that this particular PMT has a detection threshold for a THz pulse of 1 nJ and a detection confidence level of 99.7% within 55 - 250 pJ, depending on the THz pulse energy.
ISSN:	2162-2035
DOI:	10.1109/IRMMW-THz50926.2021.9567089