Title :
Photodefinable electro-optic polymer for high-speed modulators
Author :
Balakrishnan, M. ; Faccini, M. ; Diemeer, M.B.J. ; Verboom, W. ; Driessen, A. ; Reinhoudt, D.N. ; Leinse, A.
Author_Institution :
MESA+ Inst. for Nanotechnol., Univ. of Twente, Enschede, Netherlands
Abstract :
Direct waveguide definition of a negative photoresist (SU8) containing tricyanovinylidenediphenylaminobenzene (TCVDPA) as electro-optic (EO) chromophore, has been demonstrated for the first time. This was possible by utilising the chromophore low absorption window in the UV region allowing crosslinking of the host polymer by exposing to UV light followed by thermal curing. TCVDPA was modified by attachment of bulky side groups. This reduced the intermolecular interactions and resulted in an increased EO (r33) coefficient
Keywords :
curing <high-speed modulators, photodefinable EO polymer>; electro-optical modulation <high-speed modulators, photodefinable EO polymer>; photoresists <high-speed modulators, photodefinable EO polymer>; polymers <high-speed modulators, photodefinable EO polymer>; UV light; UV region; chromophore low absorption window; crosslinking; direct waveguide definition; electro-optic chromophore; high-speed modulators; intermolecular interactions; negative photoresist; photodefinable electro-optic polymer; photodefinition; thermal curing; tricyanovinylidenediphenylaminobenzene;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20063535
