The optical limiting properties of a one-dimensional, transparent metallodielectric photonic band gap structure are studied. Due to light confinement in the structure that enhances the nonlinear response of the layers, a nonlinear transmission dependence on the incident light intensity is found. Experimental results are reported for a four period sample where the single period consists of ZnO and Ag layers 109 and 17 nm thick, respectively. The structure was designed to exhibit a transmission resonance at 532 nm. Under the action of a Q-switched frequency doubled Nd:yttrium–aluminum–garnet laser, a decrease in transmission of approximately 50% is obtained for a maximum incident light intensity of 2 GW/cm2. These results are explained in terms of a dynamic change of the absorption coefficient due to the enhancement of the two-photon absorption process. These results suggest that the structure is suitable for optical limiting applications in the visible range.
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|Titolo:||Accessing the optical limiting properties of metallo-dielectric photonic band gap structures|
|Data di pubblicazione:||2003|
|Citazione:||Accessing the optical limiting properties of metallo-dielectric photonic band gap structures / Larciprete, Maria Cristina; Sibilia, Concetta; Paoloni, S.; Bertolotti, M.; Sarto, F.; Scalora, M.. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - ELETTRONICO. - 93(2003), pp. 5013-5017.|
|Appartiene alla tipologia:||01a Articolo in rivista|