A Novel Coupled Resonator Photonic Crystal Design in Lithium Niobate for Electrooptic Applications

Figure 1

52° tilted SEM image of (a) FIB milled Bragg grating on bulk LN (the scale bar denotes 5 μm) and (b) the trenches with conical cross sections. (c) Transmission spectrum of the structure in panel (a) shows high insertion loss up to 51 dB. (d) -plane (side view) FDTD field simulation showing transmission losses due to vertical plane scattering arising from conicity and poor confinement.

(a)

(b)

(c)

(d)