We are working in laser ablation of metal targets (PLD) to prepare thin film in nano range and studying all physical properties.
Dear Mr. Al-Dahash,
If you are working with ultrafast pulsed lasers (ps-fs) the damage threshold (or fluence threshold) of most of the metals is usually around 0.1-0.2 J/cm2. However, if you are working with short pulsed lasers (ns) this threshold tends to increase considerably, sometimes 10 times higher. One simple method to roughly estimate the damage threshold is to visualize in which fluence the plasma formation begins. I am quite sure you can find several publications on this topic, in which some tables present the laser parameters and the damage threshold for Cu and other metals.
Best regards,
Dear Alexandre Cunha ,
Thank you very much.we are working in study the Properties and Applications of Metal–Dielectric Nanocomposites.Physical and chemical properties of nanocomposite materials formed by metallic nanoparticles (NPs) embedded in a dielectric host are strongly dependent on their morphological features such as size, shape or size dispersion as well as on their distribution within the matrix. we used Al2O3 as host and embedded metal is Cu.
Because we used one laser equipment ,we need threshold energy to matched for two targets.
If you know any papers estimated threshold energy theoretically or in same line.
Best Regards
Dear Ahmed N. Abd,
Thank you very much.But this is too high? The ablation by this energy lead to production a large grains more than 100 nm? so that if you have an equation to calculate threshold energy of material ?
Some times ,the students that working in ablation by using laser (used more than 10000 pulses) lead to output pulse profile not Gaussian ,then the student compel to use energy more than threshold energy .
Regards
you must use high energy and few number of pulses because the number is limited
Dear Ahmed N. Abd,
I don't agree with you because we need prepare thin film in nano scale, but if you don't need grain growth in nano scale ,then that its rights.
Thank you
Regards
Dear Ghaleb Al-Dahash
If the parameters suggested from Mr. Ahamed satisfy the ablation process , but produce particles have dimensions over nano you can control another parameters , Examples :distance between target and substrate or the pulse duration of pulse laser
- Badges
- Science topic
- Similar topics
- Entomology
- Resistance