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Ultrafast Laser Micro- and Nanostructuring

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Laser Precision Microfabrication

Part of the book series: Springer Series in Materials Science ((SSMATERIALS,volume 135))

Abstract

Near-threshold non-linear nanoscale processing phenomena generated by sub-100fs laser pulses are reviewed. Coupled with high NA focusing optics, high power oscillators demonstrated a high-repetition rate approach for the precise laser machining of dielectrics on a submicrometer scale. A new field of nanostructuring proposed on the basis of apertureless scanning near-field optical nanomachining and examples of femtosecond nanosurgery are discussed.

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Abbreviations

a:

Absorbed fraction of incident laser light

α:

Absorptivity

d0 :

Beam diameter

w0 :

Beam radius

ρ:

Density

Γ:

Electron–phonon coupling constant

τe–p :

Electron–phonon relaxation time

δ:

Film thickness

F:

Fluence

Ce;l :

Heat capacity (electron, lattice)

ke;l :

Heat conductivity (electron, lattice)

β(I):

Impact ionisation rate

ξ:

Incubation factor

I:

Intensity

Q:

Laser source term

d0 :

Mean distance between two defects

N:

Number of applied pulses

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Kautek, W., Forster, M. (2010). Ultrafast Laser Micro- and Nanostructuring. In: Sugioka, K., Meunier, M., Piqué, A. (eds) Laser Precision Microfabrication. Springer Series in Materials Science, vol 135. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-10523-4_8

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