Metalloporphyrin polymer with temporally agile, broadband nonlinear absorption for optical limiting in the near infrared.
A lead bis(ethynyl)porphyrin polymer possesses strong nonlinear absorption with unprecedented spectral/temporal coverage as a result of broad, overlapping two-photon and excited-state absorption bands with favorable excited-state dynamics. Consequently, this material exhibits effective optical limiting over a range of about 500 nm in the near infrared (ca. 1050 - 1600 nm) and for laser pulsewidths spanning from 75 fs to 40 ns. Introduction of the material in a waveguide device geometry results in a strong optical limiting response.
Hales
Joel M
JM
School of Chemistry and Biochemistry, Center for Organic Photonics and Electronics, Georgia Institute of Technology, 901 Atlantic Dr NW, Atlanta, Georgia 30332, USA.
Cozzuol
Matteo
M
Screen
Thomas E O
TE
Anderson
Harry L
HL
Perry
Joseph W
JW
D000042:Absorption; D003198:Computer Simulation; D007259:Infrared Rays; D007700:Kinetics; D008665:Metalloporphyrins / Q000737:chemistry*; D017711:Nonlinear Dynamics; D011108:Polymers / Q000737:chemistry*; D012996:Solutions
D008665:Metalloporphyrins; D011108:Polymers; D012996:Solutions