Since the emergence of nonlinear optics in the 1960s, significant progress has been made in photonic technologies and their applications. This has led to the development of several materials that have nonlinear interactions with matter.
Nanocellulose materials have traditionally been utilized for their outstanding heat insulation qualities. However, cellulose nanofibrils can demonstrate strong heat conductivity when they are aligned and linked in the form of filaments, broadening the scope of their applications.