We report on the characterization of sub-Doppler resonances detected by
probing the 6S1/2-7P1/2 transition of Cs atom at 459 nm in a
microfabricated vapor cell. The dependence of the sub-Doppler resonance
(linewidth, amplitude) on some key experimental parameters, including the laser
intensity and the cell temperature, is investigated. These narrow atomic
resonances are of interest for high-resolution spectroscopy, instrumentation,
and may constitute the basis of a near-UV microcell optical standard