Optical polarization anisotropy induced by molecular alignment in pentacene films confined in micron sized grooves etched in SiO₂ substrate

Tailoring the Optical Response of Pentacene Thin Films via Templated Growth on Hexagonal Boron Nitride

“…Since the optoelectronic properties of pentacene thin films strongly depend on their morphology, − control over their growth microstructure has been an area of intense study. − However, the relationship between thin-film structure and optical properties of pentacene films has been investigated primarily on conventional inorganic substrates, most commonly amorphous SiO 2 . These studies have demonstrated some degree of control over optical anisotropy through constrained growth and tunable molecular orientation , but require fabrication or annealing procedures that are unique to the interface between pentacene and amorphous SiO 2 and do not exploit molecular templating that could be enabled by atomically well-defined substrates.…”