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Electrically reconfigurable nanophotonic hybrid grating lens array
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View: Figures


Image of FIG. 1.
FIG. 1.

Computationally simulated hybrid grating lens array and diffraction pattern at . (a) Each element has six nanotubes (intensity grating) and a resultant phase profile due to LCs (phase grating). (b) Simulated diffraction pattern with center zero order using the hybrid grating lens array model.

Image of FIG. 2.
FIG. 2.

Optical microscope image of a transparent nanophotonic hybrid grating lens array with six nanotubes per each hybrid grating element and a period of at (magnification 50×).

Image of FIG. 3.
FIG. 3.

CCD camera images of diffraction patterns generated from the transparent nanophotonic device under He–Ne laser light (633 nm). (a) Diffraction pattern at , (b) , and (c) .

Image of FIG. 4.
FIG. 4.

(a) Diffraction efficiency of the transparent nanophotonic device vs applied voltage. (b) Unwrapped phase in radians of one grating lenslet vs applied voltage.

Image of FIG. 5.
FIG. 5.

CCD camera images of diffraction patterns generated from the device under white light. (a) Different wavelengths dispersed in the diffraction orders. (b) Experimentally obtained diffraction angle. The circles represent the angle of diffraction. The diffraction angle for first order is 3.7º.


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Scitation: Electrically reconfigurable nanophotonic hybrid grating lens array