Bulk heating of transparent materials using a high-repetition-rate femtosecond laser

Schaffer, Chris B.; Garcı́a, J.F.; Mazur, Eric

doi:10.1007/s00339-002-1819-4

Cited by 398 publications

(234 citation statements)

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“…This is the mechanism for the index change produced by deep-UV excitation of the Ge-doped silica fibers used in fiber Bragg gratings and evidence has been brought for its contribution to refractive index changes in femtosecond laser written waveguides [42]. An alternative mechanism is thermally induced material densification: energy deposited by the laser melts the material in the focal volume, and the subsequent rapid resolidification dynamics lead to density (and therefore refractive index) variations [43]. Some glass types, such as fused silica, increase their density at higher temperatures; if they are rapidly cooled (quenched), the higher density (and therefore higher refractive index) structural arrangement is "frozen in".…”

Section: Review Articlementioning

confidence: 99%

Femtosecond laser microstructuring: an enabling tool for optofluidic lab‐on‐chips

Osellame

Hoekstra

Cerullo

et al. 2011

Laser & Photonics Reviews

290

226

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This paper provides an overview of the rather new field concerning the applications of femtosecond laser microstructuring of glass to optofluidics. Femtosecond lasers have recently emerged as a powerful microfabrication tool due to their unique characteristics. On the one hand, they enable to induce a permanent refractive index increase, in a micrometer-sized volume of the material, allowing single-step, three-dimensional fabrication of optical waveguides. On the other hand, femtosecond-laser irradiation of fused silica followed by chemical etching enables the manufacturing of directly buried microfluidic channels. This opens the intriguing possibility of using a single laser system for the fabrication and three-dimensional integration of optofluidic devices. This paper will review the state of the art of femtosecond laser fabrication of optical waveguides and microfluidic channels, as well as their integration for high sensitivity detection of biomolecules and for cell manipulation.

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Section: Review Articlementioning

confidence: 99%

Femtosecond laser microstructuring: an enabling tool for optofluidic lab‐on‐chips

Osellame

Hoekstra

Cerullo

et al. 2011

Laser & Photonics Reviews

290

226

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show abstract

“…For instance, using femtosecond laser exposure of silica in the cumulative regime produces localized heat affected zones. 12 Furthermore, we observed the growth of CNTs on a simple substrate fully covered with a fused silica glass window. The growth took place in a relatively short time (from 25 s to 150 s).…”

Section: Discussionmentioning

confidence: 94%

In-situ localized carbon nanotube growth inside partially sealed enclosures

2013

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Carbon nanotube assemblies can be used for specific applications such as sensors and filters. We present a method and proof-of-concept to directly grow vertically-aligned carbon nanotube structures within sealed enclosures by means of a feedback-controlled laser-assisted chemical vapor deposition technique. The process is compatible with a variety of micro-fabrication processes and bypasses the need for post-process packaging. Our experiments raise interesting observations related to the gas diffusion dynamics in micro-scale and sub-micron enclosures

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“…This is shown to be due to the thermal diffusion of the material being longer than the pulse to pulse separation (C. B. Schaffer et al, 2003). This means that the material is thermally loaded when the next pulse is incident at the focal region.…”

Section: Transparent Materialsmentioning

confidence: 99%

Advances in Femtosecond Micromachining and Inscription of Micro and Nano Photonic Devices

Smith¹,

Kalli²,

Sugden³

2010

Frontiers in Guided Wave Optics and Optoelectronics

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Bulk heating of transparent materials using a high-repetition-rate femtosecond laser

Cited by 398 publications

References 0 publications

Femtosecond laser microstructuring: an enabling tool for optofluidic lab‐on‐chips

Femtosecond laser microstructuring: an enabling tool for optofluidic lab‐on‐chips

In-situ localized carbon nanotube growth inside partially sealed enclosures

Advances in Femtosecond Micromachining and Inscription of Micro and Nano Photonic Devices

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