  Split supersymmetry is characterized by relatively light chargino and
neutralino sector and very heavy sfermion sector. We study the consequence of
CP violation in this scenario by evaluating two-loop contributions to electric
dipole moments of fermions from Higgs-photon as well as $W$-$W$ diagrams. These
contributions add coherently and produce electron and neutron electric dipole
moments close to present bounds. We then explore Higgs production at a
photon-photon collider, and consider the feasibility of measuring CP violating
$h\gamma\gamma$ coupling induced by chargino loops. Methods of enhancing the
sensitivity are discussed. For lower chargino masses and lower Higgs boson
masses, the effect of the CP violation can be observed with 90% confidence
level significance.

High Energy Physics - Phenomenology