Polarizing element

Abstract

Presented is a polarizing element that absorbs a component of a specific wavelength from electromagnetic waves passing therethrough and thus produces polarized light. The polarizing element includes a transparent substrate that has a plurality of first recesses formed in a surface of the transparent substrate. The first recesses extend parallel to one another with a predetermined spacing therebetween in a direction orthogonal to the surface of the transparent substrate. The polarizing elements further include thin-film-shaped conductive bodies formed on side surfaces of the first recesses.

1 . A polarizing element that absorbs a component of a specific wavelength from electromagnetic waves passing therethrough and thus produces polarized light, comprising: 
 a transparent substrate that has a plurality of first recesses formed in a surface of said transparent substrate and extending parallel to one another with a predetermined spacing therebetween in a direction orthogonal to said surface of said transparent substrate; and    thin-film-shaped conductive bodies formed on side surfaces of said first recesses;    wherein the following relationships are satisfied:      0.1 λ≦d< 0.5λ,  0.5 d<H≦ 20 d,    0.06d≦W≦1.5d, and  1.0 μm≦|ε|· W ·( H/d ),    where d represents said predetermined spacing between said conductive bodies, H a height of said conductive bodies, W a width of said conductive bodies, |ε| an absolute value of a complex relative permittivity of said conductive bodies, and λ a polarized light wavelength, and units of d, W, and H are μm.    
     
     
         2 . The polarizing element as claimed in  claim 1 , further satisfying the relationships:  
         0.7 d<H≦ 15 d,  and  0.06d≦W≦0.7d.  
     
     
         3 . The polarizing element as claimed in  claim 1 , further satisfying the relationships:  
         1.0 d<H≦ 10 d,  and  0.06d≦W≦0.5d.  
     
     
         4 . The polarizing element as claimed in  claim 1 , wherein said thin-film-shaped conductive bodies comprise at least one selected from the group consisting of gold, silver, copper, palladium, platinum, aluminum, germanium, rhodium, silicon, nickel, cobalt, manganese, iron, chromium, titanium, ruthenium, niobium, neodymium, ytterbium, yttrium, molybdenum, indium and bismuth.  
     
     
         5 . A polarizing element that absorbs a component of a specific wavelength from electromagnetic waves passing therethrough and thus produces polarized light, comprising: 
 a transparent substrate;    a plurality of thin-film-shaped conductive bodies arranged on a surface of said transparent substrate and extending parallel to one another with a predetermined spacing therebetween and in a direction orthogonal to said surface of said transparent substrate; and    a dielectric material that covers the whole of both said surface of said transparent substrate and said thin-film-shaped conductive bodies;    wherein the following relationships are satisfied:      0.1 λ≦d <0.5λ,  0.5 d<H≦ 20 d,    0.06d≦W≦1.5d, and  1.0 μm≦|ε|· W ·( H/d ),    where d represents said predetermined spacing between said conductive bodies, H a height of said conductive bodies, W a width of said conductive bodies, |ε| an absolute value of a complex relative permittivity of said conductive bodies, and λ a polarized light wavelength, and units of d, W, and H are μm.    
     
     
         6 . The polarizing element as claimed in  claim 5 , further satisfying the relationships:  
         0.7 <H≦ 15 d,  and  0.06d≦W≦0.7d.  
     
     
         7 . The polarizing element as claimed in  claim 5 , further satisfying the relationships:  
         1.0 d<H≦ 10 d,  and  0.06d≦W≦0.5d.  
     
     
         8 . The polarizing element as claimed in  claim 5 , wherein said thin-film-shaped conductive bodies comprise at least one selected from the group consisting of gold, silver, copper, palladium, platinum, aluminum, germanium, rhodium, silicon, nickel, cobalt, manganese, iron, chromium, titanium, ruthenium, niobium, neodymium, ytterbium, yttrium, molybdenum, indium and bismuth.