Photoinduced permanent gratings inside bulk azodye-doped polymers by the coherent field of a femtosecond laser

Si, Jinhai; Qiu, Jianrong; Zhai, Jianfeng; Shen, Yuquan; Hirao, Kazuyuki

doi:10.1063/1.1435808

Cited by 72 publications

(43 citation statements)

References 13 publications

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“…Various applications resulting from fs laser writing of different materials, especially in polymers, have been successfully demonstrated in the fields of micro-fluidics, bio-photonics, and photonics etc. [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. The minimal damage arising from the generation of stress waves, thermal conduction, or melting has proved to be one of the main responsible mechanisms for various applications demonstrated using fs laser micromachining.…”

Section: Introductionmentioning

confidence: 99%

Direct Writing in Polymers with Femtosecond Laser Pulses: Physics and Applications

Deepak¹,

Soma²,

Desai³

2012

Laser Pulses - Theory, Technology, and Applications

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Section: Introductionmentioning

confidence: 99%

Direct Writing in Polymers with Femtosecond Laser Pulses: Physics and Applications

Deepak¹,

Soma²,

Desai³

2012

Laser Pulses - Theory, Technology, and Applications

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“…Poly[2-methoxy-5-(2-ethlyhexyloxy)1,4-phenylenevinylene] (MEH-PPV) is a flexible, easy-to-process [54] conjugated polymer with outstanding electrical and optical properties, which are interesting for photonic applications [55]. Taking advantage of these features, fs-laser micromachining of MEH-PPV films has been carried out by researchers, as reported by [56].…”

Section: Fluorescent Polymeric Structuresmentioning

confidence: 99%

Ultrafast Laser Pulses for Structuring Materials at Micro/Nano Scale: From Waveguides to Superhydrophobic Surfaces

Corrêa

Almeida

et al. 2017

Photonics

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Abstract:The current demand for fabricating optical and photonic devices displaying high performance, using low-cost and time-saving methods, prompts femtosecond (fs)-laser processing as a promising methodology. High and low repetition femtosecond lasers enable surface and/or bulk modification of distinct materials, which can be used for applications ranging from optical waveguides to superhydrophobic surfaces. Herein, some fundamental aspects of fs-laser processing of materials, as well as the basics of their most common experimental apparatuses, are introduced. A survey of results on polymer fs-laser processing, resulting in 3D waveguides, electroluminescent structures and active hybrid-microstructures for luminescence or biological microenvironments is presented. Similarly, results of fs-laser processing on glasses, gold and silicon to produce waveguides containing metallic nanoparticles, analytical chemical sensors and surface with modified features, respectively, are also described. The complexity of fs-laser micromachining involves precise control of material properties, pushing ultrafast laser processing as an advanced technique for micro/nano devices.

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“…[21][22][23][24][25][26] Recording using short light pulses ͑in the range of nanoseconds to hundreds of femtoseconds͒ has also been demonstrated to be of relevance for optical applications. [27][28][29][30][31][32][33][34][35][36][37][38] In particular, the use of 532 nm lasers of few nanosecond pulse duration has shown to be effective in the recording of optical anisotropy and holographic gratings. [31][32][33][34][35][36][37][38] Some of these studies have been carried out in liquid crystalline materials, 31 although most of the work has been done in amorphous polymers.…”

Section: Pulsed Recording Of Anisotropy and Holographic Polarization mentioning

confidence: 99%

Pulsed recording of anisotropy and holographic polarization gratings in azo-polymethacrylates with different molecular architectures

Forcén

Oriol

Sánchez

et al. 2008

Journal of Applied Physics

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Recording of anisotropy and holographic polarization gratings using 532 nm, 4 ns light pulses has been carried out in thin films of polymers with the same azobenzene content ͑20 wt % ͒ and different molecular architectures. Random and block copolymers comprising azobenzene and methylmethacrylate ͑MMA͒ moieties as well as statistical terpolymers with azobenzene, biphenyl, and MMA units have been compared in terms of recording sensitivity and stability upon pulsed excitation. Photoinduced anisotropy just after the pulse was significantly higher in the case of the block copolymers than in the two statistical copolymers. The stability of the recorded anisotropy has also been studied. While a stationary value of the photoinduced anisotropy ͑approximately 50% of the initial photoinduced value͒ is reached for the block copolymer, photoinduced anisotropy almost vanished after a few hours in the statistical copolymers. Polarization holographic gratings have been registered using two orthogonally circularly polarized light beams. The results are qualitatively similar to those of photoinduced anisotropy, that is, stability of the registered grating and larger values of diffraction efficiency for the block copolymer as compared with the random copolymers. The recording of holographic gratings with submicron period in films several microns thick, showing both polarization and angular selectivity, has also been demonstrated. Block copolymers showed a lamellar block nanosegregated morphology. The interaction among azo chromophores within the nanosegregated azo blocks seems to be the reason for the stability and the photoresponse enhancement in the block copolymer as compared with the statistical ones.

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Photoinduced permanent gratings inside bulk azodye-doped polymers by the coherent field of a femtosecond laser

Cited by 72 publications

References 13 publications

Direct Writing in Polymers with Femtosecond Laser Pulses: Physics and Applications

Direct Writing in Polymers with Femtosecond Laser Pulses: Physics and Applications

Ultrafast Laser Pulses for Structuring Materials at Micro/Nano Scale: From Waveguides to Superhydrophobic Surfaces

Pulsed recording of anisotropy and holographic polarization gratings in azo-polymethacrylates with different molecular architectures

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