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(Color online). Overall diagram of the FGC ( in the present case) where and are grating vector and effective refractive index.
(Color online). The images of (a) scanning electron microscope and (b) atomic force microscope of the present FGC replicated with UV light. The FGC had a curved and chirped grating with a height of 130 nm.
The intensity profile of the focused beam of the FGC (a) along the transverse and (b) propagation direction of the guided beam. The transverse and the propagation direction corresponds to and axis in Fig. 1. The intensity profiles of the focused beam showed an aberration along the beam propagation direction.
Materials, refractive indices and thickness of each layer of the present UV-replicated FGC.
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