GaAs/AlAs Super Lattice Photocathodes

Jon R. Howorth; John Roberts; Mike F. Robinson

doi:10.1117/12.962698

22 December 1989 GaAs/AlAs Super Lattice Photocathodes

Jon R. Howorth, John Roberts, Mike F. Robinson

Proceedings Volume 1161, New Methods in Microscopy and Low Light Imaging; (1989) https://doi.org/10.1117/12.962698
Event: 33rd Annual Technical Symposium, 1989, San Diego, United States

Abstract

The design of Gallium Arsenide photocathodes has remained almost static since the pioneering work of Antypas et al in 1973/74(1). This is partly because the GaAs photocathode development has been driven by military requirements, and once production has started, the design is frozen to enable products to be standardised. Recent developments in metal organic chemical vapour deposition (MOVPE) enable new cathode structures to be designed. In our case, we are concerned to produce a photocathode with high quantum efficiency over a wide spectral band, to enable us to build photomultipliers and image intensifiers for general scientific applications. This paper describes some of the cathode structures which have been grown at Sheffield University and Epi Materials Ltd. The paper gives data on morphology, photoluminescence and other material parameters. The paper also gives some of the early data on the photo sensitivity and spectral response together with an overview of some of the devices that can be made with these photocathodes.

Citation Download Citation

Jon R. Howorth, John Roberts, and Mike F. Robinson "GaAs/AlAs Super Lattice Photocathodes", Proc. SPIE 1161, New Methods in Microscopy and Low Light Imaging, (22 December 1989); https://doi.org/10.1117/12.962698

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available