Femtosecond laser‐induced microstructures in glasses and applications in micro‐optics

Qiu, Jianrong

doi:10.1002/tcr.20006

Cited by 52 publications

(29 citation statements)

References 34 publications

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“…This study is very close to others [11,24,25] and contributes with a new method for restorative and aesthetic dentistry.…”

Section: Resultssupporting

confidence: 81%

“…Considering that an all-solid-state tunable Ti:Sapphire continuous wave laser was developed objecting new sources for spectroscopic measurements of various biophotonic information [10] and for micromachining of defects and refractive index change [24]. This study is very close to others [11,24,25] and contributes with a new method for restorative and aesthetic dentistry.…”

Section: Resultsmentioning

confidence: 66%

“…Besides, considering threshold ablation to enamel and dentin [24], Figs. 5 and 6 agree with Krüger et al [11] because dentin and enamel show the highest depths of 0.9 mm and 0.4 mm, respectively, it means that dentin has a chemical composition and very porous structure and it is reasons to become easy ablation under femtosecond pulsed laser.…”

Section: Resultsmentioning

confidence: 99%

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Selective ablation of dental enamel and dentin using femtosecond laser pulses

et al. 2007

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The study of the interaction of intense laser light with matter, as well as transient response of atoms and molecules is very appropriated because of the laser energy concentration in a femtosecond optical pulses. The fundamental problem to be solved is to find tools and techniques which allow us to observe and manipulate on a femtosecond time scale the photonics events on and into the matter. Six third human extracted molars were exposed to a femtosecond Ti:Sapphire Q-switched and mode locked laser (Libra-S, Coherent, Palo Alto, CA, USA), emitting pulses with 70 fs width, radiation wavelength of 801 nm, at a constant pulse repetition rate of 1 KHz. The laser was operated at different power levels (70 to 400 mW) with constant exposition time of 10 seconds, at focused and defocused mode. Enamel and dentin surfaces were evaluated concerned ablation rate and morphological aspects under scanning electron microscopic. The results in this present experiment suggest that at the focused mode and under higher average power, enamel tissues present microcavities with higher depth and very precise edges, but, while dentin shows a larger melt-flushing, lower depth and melting and solidification aspect. In conclusion, it is possible to choose hard or soft ablation, under lower and higher average power, respectively, revealing different aspects of dental enamel and dentin, depending on the average power, fluence and distance from the focal point of the ultra-short pulse laser on the tooth surface.

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“…This study is very close to others [11,24,25] and contributes with a new method for restorative and aesthetic dentistry.…”

Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 66%

See 1 more Smart Citation

Selective ablation of dental enamel and dentin using femtosecond laser pulses

et al. 2007

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“…A new approach for the local modification of transparent materials through nonlinear optical processes has been investigated due to extraordinarily high peak intensities of short pulses. A variety of materials including metals, dielectrics, polymers, and semiconductors have been successfully processed by the use of fs pulses [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Bulk refractive index change in transparent materials is found to be useful in applications of waveguides.…”

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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“…Especially interesting is application of short pulse laser radiation for modification of spherical shape of silver nanoparticles in glass [24-2н]. Optical microscopy studies [24] have shown that irradiation by circularly polarized femtosecond laser radiation can change the spherical shape of silver nanoparticles in glass.…”

Section: F"rmati"n "F Silver Nan"clusters In Ps Glasses By Uv Irradiamentioning

confidence: 99%

Silver Nanoparticles in Oxide Glasses: Technologies and Properties

Никоноров¹,

Sidorov²,

Tsekhomskii³

2010

Silver Nanoparticles

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Intr"ducti"nNano-size particles of noble metals (Ag, Au, Pt) are today a subject of thorough attention of scientific researchers and of technologists, because these particles reveal the wide range of physical features, absent in the case of bulk media. Size-controlled optical properties of Ag-nanoparticles open good prospects for potential technological applications -such as diffraction elements, optical filters, nanoplasmonic devices, bi-sensors, and nonlinear media. Silver nanoparticles can be produced in various media -in water solutions, in polymers, in glasses, and in crystalline media. For instance, the long period in photographic imaging technique was based on the photoinduced production of Ag nanoclusters in the crystals of AgHal (the latent image). At the same time one can say that the inorganic glasses are the unique matrix for silver nanoparticles formation. The wide temperature range of glass viscosity growth provides the possibility to control over the Ag nanoparticles size within the wide range by means of modifying the temperature and duration of thermal processing. In the fact, only such kind of matrix makes it possible to control and investigate all the stages of Ag nanoparticles formation, including the starting stage. Glass coloring by introduction of the metallic Ag nanoclusters is one of the ancient methods, known by humanity [1]. The mechanisms, leading to nucleation and growth of such nanoclusters, are the scientific and technology problem, important both for colored glass production and for all other potential applications of glass with silver nanoparticles [2][3][4][5]. The researches on silver nanoclusters formation comprise numerous technical approaches. Especially interesting are the methods, based on the use of ionizing radiation, are especially interesting due to their ability provide either local irradiation or to irradiate the whole volume of the glass. In this case it is comparatively simple to provide the control over concentration and average size of metallic nanoclusters. For instance, the controlled photon irradiation is used for production of photosensitive [6], polychrome [м] and photo-thermorefractive [н] glasses. Very often all these types of glasses are called the photosensitive one (PS). Further within this chapter we shall use this word. 10www.intechopen.com

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Femtosecond laser‐induced microstructures in glasses and applications in micro‐optics

Cited by 52 publications

References 34 publications

Selective ablation of dental enamel and dentin using femtosecond laser pulses

Selective ablation of dental enamel and dentin using femtosecond laser pulses

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

Silver Nanoparticles in Oxide Glasses: Technologies and Properties

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