Electrically tunable diffraction of light from 2D nematic colloidal crystals.

Electrically tunable diffraction of light from 2D nematic colloidal crystals.

We show that diffraction of visible light from 2D dipolar nematic colloidal crystals can be tuned electrically. When the external electric field of approximately 1 V/microm is applied in a direction perpendicular to the plane of the 2D colloidal crystal, the induced strain is highly anisotropic, and...

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Bibliografiska uppgifter
Huvudupphovsmän: Humar, M, Skarabot, M, Ravnik, M, Zumer, S, Poberaj, I, Babic, D, Musevic, I
Materialtyp: Journal article
Språk:English
Publicerad: 2008
Beskrivning
Sammanfattning:We show that diffraction of visible light from 2D dipolar nematic colloidal crystals can be tuned electrically. When the external electric field of approximately 1 V/microm is applied in a direction perpendicular to the plane of the 2D colloidal crystal, the induced strain is highly anisotropic, and the inter-colloidal spacing changes by as much as 20% along one direction and approximately 2% along the perpendicular one. Although the speed of response is in the range of several seconds, this novel mechanism could provide interesting photonic applications.

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