Nanofabrication with Pulsed Lasers

A V Kabashin,Ph Delaporte,D Grojo,A Pereira,R Torres,M Sentis,Th Sarnet

doi:10.1007/s11671-010-9543-z

A V Kabashin, Ph Delaporte + Show 5 more

Open Access

https://doi.org/10.1007/s11671-010-9543-z

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Abstract

An overview of pulsed laser-assisted methods for nanofabrication, which are currently developed in our Institute (LP3), is presented. The methods compass a variety of possibilities for material nanostructuring offered by laser–matter interactions and imply either the nanostructuring of the laser-illuminated surface itself, as in cases of direct laser ablation or laser plasma-assisted treatment of semiconductors to form light-absorbing and light-emitting nano-architectures, as well as periodic nanoarrays, or laser-assisted production of nanoclusters and their controlled growth in gaseous or liquid medium to form nanostructured films or colloidal nanoparticles. Nanomaterials synthesized by laser-assisted methods have a variety of unique properties, not reproducible by any other route, and are of importance for photovoltaics, optoelectronics, biological sensing, imaging and therapeutics.

Highlights

When nanostructured, many materials start to exhibit new optical properties making them unique for a plethora of applications
The methods compass a variety of possibilities for material nanostructuring offered by laser–matter interactions and imply either the nanostructuring of the laser-illuminated surface itself, as in cases of direct laser ablation or laser plasma-assisted treatment of semiconductors to form light-absorbing and light-emitting nano-architectures, as well as periodic nanoarrays, or laserassisted production of nanoclusters and their controlled growth in gaseous or liquid medium to form nanostructured films or colloidal nanoparticles
Nanomaterials synthesized by laser-assisted methods have a variety of unique properties, not reproducible by any other route, and are of importance for photovoltaics, optoelectronics, biological sensing, imaging and therapeutics

Summary

Introduction

Many materials start to exhibit new optical properties making them unique for a plethora of applications. Depositing grating-like contacts on the top on the treated area, we were able to obtain the amplification of photocurrent by 50% compared to the untreated surface area Such result was attributed to an enhanced absorption granted by the penguin-like structures, much larger surface of nanostructured silicon used for signal collection, and high quality of boron implantation offered by the post-ablation plasma implantation procedure. In the case of the laser plasma-based treatment of Zn in ambient air, the produced ZnO nanostructures exhibit very strong exciton-related peak around 380–385 nm under photoexcitation, whereas photoluminescence peaks associated with defects are essentially absent [49] Such nanostructure is capable of providing the mirror-less random lasing effect, arising as a result of a simultaneous strong amplification and scattering in a highly disordered medium [48]. Pores are optically drilled in the Al2O3 film (b)

Drilling of the Al203 membrane

Conclusions