The generation and numerical and optical characterization of a single-beam,
ponderomotive-optical trap are discussed. A novel segmented wave-plate tec
hnique is described, and experimental results of the trap formation are pre
sented. Several methods to tune the traps are discussed, including techniqu
es to realize a bright trap for dark-seeking electrons. The effects of non-
Gaussian incident beams and beams with phase aberrations on trap formation
are also described. (C) 2000 Optical Society of America [S0740-3224(00)0290
4-0]. OCIS codes: 000.2190, 020.7010, 140.3370, 140.7010, 350.5340.