We report on highly transparent holographic phase transmission volume gratings recorded in the visible region at (Formula presented.) = 532 nm. The maximum measured diffraction efficiency is higher than 80% with a grating pitch of (Formula presented.) ≈ 300 nm and a refractive index modulation (Formula presented.) n ≈ 0.018. To obtain these results, we used a holographic mixture based on multi-reticulated acrylate and haloalkanes (1-bromo-butane and 1-bromo-hexane) and a synergic combination of camphore-quinone, which has a maximum absorbance at c.a. 470 nm, and R6G, here used as co-initiator, to efficiently initiate the photo-polymerization process. High transparent and high efficient holographic structures based on polymers can find applications in many research fields including integrated optics, sensors, high density data storage and security.
Top-Performance Transmission Gratings with Haloalkanes-Based Polymeric Composite Materials / Castagna, R.; Riminesi, C.; Di Donato, A.; Francescangeli, O.; Lucchetta, D. E.. - In: MATERIALS. - ISSN 1996-1944. - ELETTRONICO. - 15:23(2022), p. 8638. [10.3390/ma15238638]
Top-Performance Transmission Gratings with Haloalkanes-Based Polymeric Composite Materials
Castagna R.
;Di Donato A.;Francescangeli O.;Lucchetta D. E.
Writing – Review & Editing
2022-01-01
Abstract
We report on highly transparent holographic phase transmission volume gratings recorded in the visible region at (Formula presented.) = 532 nm. The maximum measured diffraction efficiency is higher than 80% with a grating pitch of (Formula presented.) ≈ 300 nm and a refractive index modulation (Formula presented.) n ≈ 0.018. To obtain these results, we used a holographic mixture based on multi-reticulated acrylate and haloalkanes (1-bromo-butane and 1-bromo-hexane) and a synergic combination of camphore-quinone, which has a maximum absorbance at c.a. 470 nm, and R6G, here used as co-initiator, to efficiently initiate the photo-polymerization process. High transparent and high efficient holographic structures based on polymers can find applications in many research fields including integrated optics, sensors, high density data storage and security.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.