  We study the free energy across a stratified media made by graphene (G)
and/or molybdenum disulfide (MoS2). The flux depends not only on the number of
G/MoS2 layers but also on the priority of graphene layer respect to MoS2 layer
in the media. The rule is; the thinner layer should be the nearest neighborhood
of leftmost and rightmost sides of the media for getting the highest energy
flux. The free energy can be tuned by applying an external gate voltage to MoS2
layers due to the tunable property of the dielectric constant of MoS2 by the
gate voltage. Also we show in the silicon/MoS2/silicon three-body
configuration, the photon heat tunneling is amplified significantly due to the
increasing the number of the coupled modes. Due to the amplifying effect, this
mechanism could be exploited to improving detection ability in the near
infrared detection systems.
