In this study we demonstrate MIM structures for combined functionality of visible wavelength transparency with MIR absorption for applications in optical windows via following designs based on: 1) thin Au film (∼ 10 nm thickness) for metal ground plate (Thin-Au) and 2) Indium Tin Oxide (ITO) as the metal ground plate . The first design is adopted for windows with radiative cooling of room and the second for room heating (a greenhouse effect).