Abstract
ABSTRACTIn the past, we have proposed a new cold cathode emitter which consists of a thin region of CdS (Cadmium Sulfide) sandwiched between a heavily doped InP (Indium Phosphide) substrate and a low work function LaS (Lanthanum Sulfide) semimetallic thin film. In this paper, we briefly review the principle of operation of the cathode and discuss the preliminary experimental steps undertaken to realize prototypes of the device. More specifically, we describe the growth of bulk samples of LaS which is used to achieve Negative Electron Affinity of the CdS/LaS surface. X-ray diffraction and micro-Raman experiments show the successful growth of the fcc cubic phase of LaS samples.
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