Title :
Theory of the laser diode interaction in scanning force microscopy
Author :
Sarid, Dror ; Weissenberger, Volker ; Iams, Douglas A. ; Ingle, Jeffery T.
Author_Institution :
Opt. Sci. Center, Arizona Univ., Tucson, AZ, USA
fDate :
8/1/1989 12:00:00 AM
Abstract :
The theory of interaction of a vibrating cantilever and a laser diode used in a scanning force microscope is given in terms of a feedback-dependent parameter C, which determines the gain associated with the interaction. It is shown that both C and the amplitude of the vibrations can be determined experimentally from the measurement of the first and second harmonics. Experimental results, which are in good agreement with the theory, yield a value for C of 0.045. Under these weak feedback conditions, it is found that the interaction can be modeled approximately as a simple homodyne process
Keywords :
atomic force microscopy; laser beam applications; semiconductor junction lasers; feedback; gain; harmonics; homodyne process; laser diode; scanning force microscopy; vibrating cantilever; Atomic force microscopy; Diode lasers; Laser feedback; Optical devices; Optical feedback; Optical interferometry; Optical microscopy; Optical mixing; Optical sensors; Vibration measurement;
Journal_Title :
Quantum Electronics, IEEE Journal of
