Tunable chiral film optical filter

G - Physics – 02 – B

Patent

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Details

G02B 5/22 (2006.01) B32B 3/26 (2006.01) F21V 9/14 (2006.01) G02B 5/30 (2006.01)

Patent

CA 2552602

An optically active composition (100) for optical applications has been identified. The optically active composition (100) can include at least one cyclic molecule having a nanocore (112) disposed within the cyclic molecule to form a filled ring (108). The composition (100) is optically transmissive for at least one photonic wavelength that would not otherwise be transmitted by the composition (100) if the nanocore were absent from the cyclic molecule. The cyclic molecule can be a carbon ring, an aromatic ring, or a heterocyclic ring. The filled ring (108) can be attached to a chiral molecule which is a repeat unit (102) in a polymeric backbone. A second filled ring (110) which causes the composition to be optically transmissive at a second wavelength also can be attached to the chiral molecule (102) as well. An electric field can be applied to the filled ring (108) to adjust the wavelength at which filled ring (108) is transmissive.

L'invention concerne une composition (100) optiquement active destinée à des applications optiques. Cette composition (100) optiquement active peut comprendre au moins une molécule cyclique comportant un nano-noyau (112) disposé à l'intérieur de la molécule cyclique de manière à former un cycle plein (108). La composition (100) est optiquement transparente à au moins une longueur d'onde photonique qui ne serait pas transmise par la composition (100) si le nano-noyau était absent de la molécule cyclique. La molécule cyclique peut être un cycle de carbone, un cycle aromatique ou un cycle hétérocyclique. Le cycle plein (108) peut être attaché à une molécule chirale laquelle est une unité de répétition (102) d'une chaîne principale polymère. Un second cycle plein (110) qui rend la composition optiquement transparente à une seconde longueur d'onde peut en outre être rattaché à la molécule chirale (102). La longueur l'onde à laquelle le cycle plein (108) est transparent peut être réglée par application d'un champ électrique à ce dernier.

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