Abstract
Although most third-order nonlinear optical (NLO) materials are closed-shell singlet systems, this Letter theoretically shows that the third-order NLO properties are drastically enhanced in symmetric open-shell diradical systems with intermediate diradical character and further reveals that this enhancement is associated with the ferromagnetic and antiferromagnetic interactions. This new paradigm opens up a promising area for designing new third-order NLO materials.
Original language | English |
---|---|
Article number | 033001 |
Journal | Physical review letters |
Volume | 99 |
Issue number | 3 |
DOIs | |
Publication status | Published - 20 Jul 2007 |