Experimental parameters of the photoemitter membrane spatial light modulator

Experimental parameters of the photoemitter membrane spatial light modulator (PEMLM) photocathode, microchannel plate (MCP), and membrane are measured to determine the constraints they impose on the fabrication and performance of the device. An analysis of the PEMLM has shown that the ratio of the MCP strip current to the membrane tension is proportional to the ultimate limit of the device time response. Experimental measurements indicate that the ultimate performance has not been obtained. A different selection of the membrane material can improve the time response by lowering the tension. But the material selection is greatly restricted by the need to incorporate a visible photocathode for applications utilizing feedback. The use of high temperature stable membranes with low tensions and high strip current MCPs should enhance the PEMLM's time response.