A tunable electromagnetic spectrum shifter prepared by physical vapor deposition methods and having optical properties achieved through surface plasmon resonance between nano particles, the shifter comprising: two different nano particles (A, B) deposited as at least one layer onto at least one surface (SL) of one or more transparent, translucent, or reflective substrate; wherein electromagnetic spectrum shifting is achieved via plasmonic coupling between the two different nano particles (A, B) in the at least one layer; wherein one of said two different nano particles (A) is metal based while the other of said two different nano particles (B) is either metal based or an inorganic compound; wherein the different nano particles are in close proximity to each other on the at least one surface (SL) of a transparent, translucent, or reflective substrate, wherein said close proximity is a distance between the two different nano particles (A, B) ranging from at least 1nm to no more than 15nm; and wherein relative positions of two nano particles in each pair of the different nano particles are in random three-dimensional direction in respect with other pairs such that the different nano particles in each of said at least one layer of two different nano particles (A, B) are not arranged as one layer of one nano particles (A) stacked on top of another layer of the other one nano particles (B), characterized in that : said one of the two different nano particles (A) is made of a material with low absorption in visible spectrum selected from the group consisting of silver and aluminum while the other of the two different nano particles (B) is made of a material selected from the group consisting of chromium, titanium, MoO 3 , Cs 2 CO 3 , and LiF. two different nano particles (A, B) deposited as at least one layer onto at least one surface (SL) of one or more transparent, translucent, or reflective substrate; wherein electromagnetic spectrum shifting is achieved via plasmonic coupling between the two different nano particles (A, B) in the at least one layer; wherein one of said two different nano particles (A) is metal based while the other of said two different nano particles (B) is either metal based or an inorganic compound; wherein the different nano particles are in close proximity to each other on the at least one surface (SL) of a transparent, translucent, or reflective substrate, wherein said close proximity is a distance between the two different nano particles (A, B) ranging from at least 1nm to no more than 15nm; and wherein relative positions of two nano particles in each pair of the different nano particles are in random three-dimensional direction in respect with other pairs such that the different nano particles in each of said at least one layer of two different nano particles (A, B) are not arranged as one layer of one nano particles (A) stacked on top of another layer of the other one nano particles (B), characterized in that : said one of the two different nano particles (A) is made of a material with low absorption in visible spectrum selected from the group consisting of silver and aluminum while the other of the two different nano particles (B) is made of a material selected from the group consisting of chromium, titanium, MoO 3 , Cs 2 CO 3 , and LiF. <EOS>