NEW DEVELOPMENT IN CONFOCAL SCANNING OPTICAL MICROSCOPY AND ITS APPLICATION TO THE STUDY OF ELECTRICALLY ACTIVE DEFECTS IN SEMICONDUCTORS

A description is given of the design and some early results from a new confocal scanning optical microscope. It is designed for the study of Photoluminescence but has a broad range of potential applications in materials science. The optical system is integrated with a helium cryostat to permit control of specimen temperature from ambient to 2K. Servomechanisms control the position of the specimen with respect to the focal point of the objective, to eliminate the effects of vibration and drift