Welcome to my website!

Thanks for stopping by, and I hope you will find some interesting ideas. You can always come back for more. 

 

This is a work in progress (read THIS first)
See each page for the date of last changes.
 Last modified: May 10, 2008

 

This website is dedicated to the use of lasers for material processing  [1].

I present a synthesis of the scientific knowledge related to laser-matter interaction, and to the effects of laser light on materials in terms of chemical and structural transformations. I propose a new scheme that relies on the concept of photoionization mode. This new scheme is the base of a phenomenological model (I am working on it) that covers a wide range of laser-matter interaction regimes, and which constitutes a valuable tool for scientists and engineers. Its practical value is that it makes it easier to predict and to design new laser applications, and to carry out material processing experiments. I also propose some applications in semiconductors and microelectronics, biology, and medicine.

A fundamental requirement for the existence of a tool is the control of all phenomena that govern its functioning. The result of my work is a body of knowledge that enables one to control the spatial distribution of the dose induced by laser pulses, and the relative yields of primary photolytic species, by controlling the properties of the laser beam. The dose distribution can be conveniently shaped by inducing a superposition of four modes of ionization each having specific characteristics: Single-Photon Ionization (SP), Optical Breakdown (OB), Filamentary Ionization (F), and Below Optical Breakdown Threshold (B/OB). The mixed ionization modes are: SP-OB, SP-B/OB, and F-OB.  

Please send me your opinions and/or criticism at the address below.

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[1] The term material refers to any category:  ordered or amorphous, liquid, gas or solid, biological or non-biological. The term processing refers to any transformation induced to the material. A transformation, be it permanent or temporary, ultimately reduces to chemical and structural transformations, or to a modification of the form (shape).