Related Experiment Video
Updated: Jul 14, 2026
08:48
Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
Published on: November 9, 2015
Macro and microsurface morphology reconstructions during laser-induced etching of silicon
Rajesh Kumar1, H S Mavi, A K Shukla
1Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
Micron (Oxford, England : 1993)
|May 23, 2007
Summary
Laser power density influences silicon surface morphology, creating pores at low power and pillars at high power. Etching rate, dependent on laser power, drives these micro/macro structure changes.
Area of Science:
- Materials Science
- Surface Engineering
- Laser-based Fabrication
Background:
- Understanding laser-material interactions is crucial for advanced manufacturing.
- Surface morphology significantly impacts material properties and performance.
- Controlling microstructure formation is key to tailoring silicon's functionality.
Purpose of the Study:
- To investigate the relationship between laser power density and silicon surface morphology.
- To analyze the development of microstructures during laser etching.
- To elucidate the role of etching rate in surface reconstruction.
Main Methods:
- Laser etching of silicon.
- Surface characterization using Scanning Electron Microscopy (SEM).
- Surface topography analysis with Atomic Force Microscopy (AFM).
Main Results:
- Pore-like structures form at low laser power densities.
- Pillar-like structures emerge at higher laser power densities.
- Etching rate, a function of laser power density, dictates surface morphology.
- Simultaneous macro and micro-surface reconstructions occur with increasing etching rate.
Conclusions:
- Laser power density is a critical parameter for controlling silicon surface morphology.
- Etching rate mediates the transformation from porous to pillar structures.
- Both macro and micro-scale surface changes are driven by the etching process.
