Three-Dimensional Micro- and Nano-Structuring of Materials by Tightly Focused Laser Radiation

Juodkazis, Saulius; Mizeikis, Vygantas; Matsuo, Shigeki; Ueno, Kosei; Misawa, Hiroaki

doi:10.1246/bcsj.81.411

Cited by 81 publications

(77 citation statements)

References 195 publications

(231 reference statements)

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“…Miniaturized DFB lasers using opal structures as well as micro lasers based on evanescent wave amplification around a colloidal micro-sphere (Datsyuk et al, 2005a,b) are promising directions for miniaturized optically pumped lasers. Such micro-opal patterns can be easily integrated into microfluidic environment (Misawa and Juodkazis, 1999;Juodkazis et al, 2008) providing new functionalities in sensors and laser tweezer applications.…”

Section: Resultsmentioning

confidence: 99%

Optical Characterization and Lasing in Three-Dimensional Opal-Structures

Nishijima

Juodkazis

2015

Front. Mater.

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The lasing properties of dye-permeated opal pyramidal structures are compared with the lasing properties of opal films. The opal-structures studied were made by sedimentation of microspheres and by sol-gel inversion of the direct-opals. Forced-sedimentation by centrifugation inside wet-etched pyramidal pits on silicon surfaces was used to improve the structural quality of the direct-opal structures. Single crystalline pyramids with the base length of~100 µm were formed by centrifuged sedimentation. The lasing of dyes in the well-ordered crystalline and poly-crystalline structures showed a distinct multi-modal spectrum. Gain via a distributed feedback was responsible for the lasing since the photonic band gap was negligible in a low refractive index contrast medium; the indices of silica and ethylene glycol are 1.46 and 1.42, respectively. A disordered lasing spectrum was observed from opal films with structural defects and multi-domain regions. The three-dimensional structural quality of the structures was assessed by in situ optical diffraction and confocal fluorescence. A correlation between the lasing spectrum and the three-dimensional structural quality was established. Lasing threshold of a sulforhodamine dye in a silica opal was controlled via Förster mechanism by addition of a donor rhodamine 6G dye. The lasing spectrum had a well-ordered modal structure, which was spectrally stable at different excitation powers. The sharp lasing threshold characterized by a spontaneous emission coupling ratio, β ≃ 10 −2 , was obtained.

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Section: Resultsmentioning

confidence: 99%

Optical Characterization and Lasing in Three-Dimensional Opal-Structures

Nishijima

Juodkazis

2015

Front. Mater.

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“…Moreover, self-focusing can be also involved in counteracting the intensity dispersion produced by spherical aberration. Self-focusing is a non-linear process that takes into account the refractive index dependence with light intensity and that often appears when working with femtosecond laser pulses [14][15][16][17][18][19]. Above a critical power value, the Gaussian intensity profile of the beam induces a refractive-index variation within the material that acts as a converging lens that promotes additional focusing.…”

Section: Discussionmentioning

confidence: 99%

“…Above a critical power value, the Gaussian intensity profile of the beam induces a refractive-index variation within the material that acts as a converging lens that promotes additional focusing. At 1027 nm wavelength the critical power for self-focusing in Foturan can be estimated in between 1.3 and 2.6 MW [16][17][18][19]. Thus, for pulse energies above 0.6 J this mechanism may compensate for the spherical aberration one, allowing the photomodification of material at depths and energies that otherwise should not occur.…”

Section: Discussionmentioning

confidence: 99%

3D features of modified photostructurable glass–ceramic with infrared femtosecond laser pulses

Fernández-Pradas

Serrano

Bosch

et al. 2011

Applied Surface Science

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a b s t r a c tThe exclusive ability of laser radiation to be focused inside transparent materials makes lasers a unique tool to process inner parts of them unreachable with other techniques. Hence, laser direct-write can be used to create 3D structures inside bulk materials. Infrared femtosecond lasers are especially indicated for this purpose because a multiphoton process is usually required for absorption and high resolution can be attained. This work studies the modifications produced by 450 fs laser pulses at 1027 nm wavelength focused inside a photostructurable glass-ceramic (Foturan ® ) at different depths. Irradiated samples were submitted to standard thermal treatment and subsequent soaking in HF solution to form the buried microchannels and thus unveil the modified material. The voxel dimensions of modified material depend on the laser pulse energy and the depth at which the laser is focused. Spherical aberration and selffocusing phenomena are required to explain the observed results.

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“…This makes cheap and mass production of nanostructures impossible [1]. It is worthwhile to mention here the review articles [2,3]. They describe the methods of formation of nanoparticles and nanostructures with the use of laser radiation.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembly of Nanoparticles Controlled by Resonant Laser Light

Aleksandrovsky¹,

Tsipotan²,

Slabko³

et al. 2015

J. Sib. Fed. Univ., Math. phys.

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The paper presents theoretical justification for the possibility of formation of nanoparticle structures with the predefined configuration. The process of formation is the self-organized aggregation of nanoparticles under the action of external resonant laser field. The formation of various nanostructures that contain metallic and semiconducting nanoparticles with resonances in the visible spectrum is considered in the dipole-dipole approximation.

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Three-Dimensional Micro- and Nano-Structuring of Materials by Tightly Focused Laser Radiation

Cited by 81 publications

References 195 publications

Optical Characterization and Lasing in Three-Dimensional Opal-Structures

Optical Characterization and Lasing in Three-Dimensional Opal-Structures

3D features of modified photostructurable glass–ceramic with infrared femtosecond laser pulses

Self-Assembly of Nanoparticles Controlled by Resonant Laser Light

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