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XRD data for the film deposited onto an MgO (100) single crystal substrate.
(a) SEM image of the hole profiles into a LN thin film deposited on a MgO substrate by PLD. The FIB cross section exhibits the hole size and shape and the thickness of the LN layer. (b) SEM image of the PhC.
Examples of SNOM results. (a) Shear-force image of the LN PhC slab. PhCOF: PhC output face; PhCEF: PhC entrance face; LPD: light propagation direction. (b) Horizontal cross-section plotted at the center of the PhC above the optical near-field images acquired at 1520 and 1600 nm, respectively. Notice that the light propagated from the right to the left.
Experimental transmission spectrum extracted from optical near-field experiments. The vertical dashed line indicates the position of the stop band edge.
Theoretical transmission spectrum of the PhC etched into a LN index gradient waveguide calculated by 2D-FDTD method. The position of the stop band edge is marked by the vertical dashed line.
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