An electromagnetic optical relay is disclosed in which a solid slug moves within
a switching channel formed in relay housing. An optical path passing through the
switching channel is blocked or unblocked by motion of the solid slug. Motion of
the solid slug is controlled by at least two electromagnetic actuators, such as
electrical coils surround the switching channel. Motion of the solid slug is resisted
by a liquid, such as a liquid metal, that wets between the solid slug and at least
one fixed contact pad in the switching channel. The surface tension of the liquid
provides a latching mechanism for the relay. An optical signal may be reflected
from the wetted surface of the solid slug and switched to an alternative optical path.
