  We present a proposal for the experimental observation of energy-time
entanglement of quasi-particles in mesoscopic physics. This type of
entanglement arises whenever correlated particles are produced at the same time
and this time is uncertain in the sense of quantum uncertainty, as has been
largely used in photonics. We discuss its feasibility for electron-hole pairs.
In particular, we argue that the recently fabricated 2DEG-2DHG junctions,
irradiated with a continuous laser, behave as "entanglers" for energy-time
entanglement.
