@inbook {Chung:18, title = {Milli-Hertz Surface Spectroscopy}, booktitle = {Laser Spectroscopy IX}, year = {1989}, pages = {216{\textendash}219}, publisher = {Academic Press}, organization = {Academic Press}, abstract = {A technique that has been repeatedly employed in high resolution light scattering experiments is that of light beating, or heterodyne, spectroscopy. By detecting the beating signal between the scattered light and a {\textquoteright}local oscillator{\textquoteright} derived from the same laser source, one can obtain ultrahigh spectral resolution, independent of the random fluctuations of the light source. We reported earlier of a novel Fourier transform heterodyne spectroscopy (FTHS) technique with high resolution which is simpler and more direct than the conventional heterodyne technique; we have since improved our resolution ten-thousand fold to the 20-Hz range. We applied this technique first to study nonequilibrium phenomena at liquid-vapor interfaces. The ultrahigh resolution also enables one to observe the very small Doppler shift of a light beam reflected from a growing silicon crystal.}, url = {/files/mazur/files/pub_18.pdf}, author = {D. S. Chung and K. Y. Christina Lee and Mazur, E.}, editor = {M. Feld, A. Mooradian and J. Thomas} }