Two-photon patterning of a polymer containing Y-shaped azochromophores

Journal Article · Mon Jan 05 00:00:00 EST 2009 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3058820· OSTI ID:21175848

Ambrosio, A; Orabona, E; Maddalena, P ^[1]; Camposeo, A; Polo, M; Neves, A A. R.; Pisignano, D ^[2]; Carella, A; Borbone, F; Roviello, A ^[3]

---

1. Dipartimento di Scienze Fisiche and CNR-INFM CRS-COHERENTIA, Universita degli Studi Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80126 Napoli (Italy)
2. CNR-INFM National Nanotechnology Laboratory, Distretto Tecnologico ISUFI, Universita del Salento, via Arnesano, I-73100 Lecce (Italy)
3. Dipartimento di Chimica, Universita degli Studi Federico II, Complesso Universitario di Monte Sant'Angelo, Via Cintia, I-80126 Napoli (Italy)

We report on the patterning of the free surface of azo-based polymer films by means of mass migration driven by one- or two-photon absorption. A symmetric donor-acceptor-donor structured Y-shaped azochromophore is specifically synthesized to enhance two-photon absorption in the polymer. The exposure of the polymer film to a focused laser beam results in light-driven mass migration for both one- and two-photon absorptions. Features with subdiffraction resolution (250 nm) are realized and the patterning dynamics is investigated as a function of the light dose. Furthermore, functional photonic structures, such as diffraction gratings with periods ranging between 0.5 and 2.0 {mu}m, have been realized.

• OSTI ID: 21175848
• Journal Information: Applied Physics Letters, Vol. 94, Issue 1; Other Information: DOI: 10.1063/1.3058820; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
DIFFRACTION GRATINGS
FILMS
LASER MATERIALS
LASERS
MULTI-PHOTON PROCESSES
PHOTONS
POLYMERS