Tuning of the Optical Properties in Photonic Crystals Made of Macroporous Silicon

Figure 4

(a) Schematic relation between parallel (P), planar polar (PP), or escaped radial (ER) director fields and the respective ²H-NMR-lineshapes. ²H-NMR spectrum of α-deuterated 5CB in cylindrical pores with perpendicular anchoring [thin line: spectrum expected for an escaped radial (ER) structure with weak anchoring]. For details, see [36, 37].

(a)

(b)