Optical constants for the S20 photocathode, and their application to increasing photomultiplier quantum efficiency

The complex refractive index of an S20 multi-alkali photocathode has been determined for the first time over the whole visible and near infrared wavelength range using reflectance measurements. The real part n is around 3 and shows little variation with wavelength. The imaginary part k falls from 1....

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Bibliographic Details
Published in:Optics communications 2000-06, Vol.180 (1), p.89-102
Main Authors: Hallensleben, S, Harmer, S.W, Townsend, P.D
Format: Article
Language:English
Subjects:
Applied sciences
Electronics
Exact sciences and technology
Experimental methods and instrumentation for elementary-particle and nuclear physics
Imaging devices
Nuclear physics
Optical constants
Photocathodes
Photomultipliers
Photomultipliers
phototubes and photocathodes
Physics
Quantum efficiency
Radiation detectors
Radiation detectors, dosimeters
Refractive index
S20
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
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Summary:The complex refractive index of an S20 multi-alkali photocathode has been determined for the first time over the whole visible and near infrared wavelength range using reflectance measurements. The real part n is around 3 and shows little variation with wavelength. The imaginary part k falls from 1.2 in the blue towards
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(00)00694-5