In-plane anisotropic photoresponse in all-polymer planar microcavities
2016; Elsevier BV; Volume: 84; Linguagem: Inglês
10.1016/j.polymer.2016.01.009
ISSN1873-2291
AutoresR. Knarr, Giovanni Manfredi, Elisa Martinelli, Matteo Pannocchia, Diego Repetto, Carlo Mennucci, Ilaria Solano, M. Canepa, F. Buatier de Mongeot, Giancarlo Galli, Davide Comoretto,
Tópico(s)Photochromic and Fluorescence Chemistry
ResumoWe report on the optical photomodulation properties of all-polymer planar microcavities in which the photochromic poly((4-pentyloxy-3'-methyl-4'-(6-methacryloxyhexyloxy))azobenzene) (PMA4) acts as photoresponsive cavity layer. We induce the trans-cis isomerization process of the azobenzene group by polarized 405 nm CW-laser irradiation, while the backward process is driven by unpolarized CW-laser irradiation at 442 nm. The all-optical photoisomerization process induces a remarkable in-plane anisotropic spectral shift of the cavity modes for the first and second order photonic band gaps. The spectral and intensity modulation effects for these flexible all-polymer microcavities are discussed with respect to those so far reported in literature for analogous systems.
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