The growing demand for sustainable energy generation has often pointed
to solar energy as a very promising alternative. A new way to harvest
solar energy is through solar rectennas. These systems are the
integration of micro size antennas and nano diodes. In this way,
electromagnetic energy can be captured and converted to the form of
direct current. The challenges for the development of this technology
are due to the submicron sizes since the theory that describes the
operation of antennas moves away from classical electromagnetic behavior
and incorporates quantum effects. At the same time, diodes operating in
tens or hundreds of THz need specific properties. Within this context,
this work presents an investigative study on solar rectennas for
operation in THz range by using a bowtie antenna and a geometric diode,
both based on graphene.