Dear,

The radiation can be directed at a particular angle of Brewster angle. If inclination is not feasible, a simple coverage should be applied with a dedicated opening where laser pulse can enter.

Thankyou Prof. Muhammad  Aslam .. its an honour that you answer my question. I will try my best to reduce this problem.

Dear Prof. Baig

Need to ask few questions. I was able to reduce my problem during Pulse laser ablation in liquids , I obtain some coloured solution of Fe and NiFe nanoparticles. I did Uv to check the absorption of these solution. I find some question I hope your are the best to ask.

Question 1: Why absorption increases by increasing the Laser Fluence? (Is it because more and more energy is deposited by the laser pulse per unit area that causes the ablation rate higher, the number of particles formation increases by increasing fluence that why they the absorption is getting higher in solution? )

Question 2: what if the above questioned phenomena is reversed means if the Fluence is higher the the Absorption spectra we observe results lower what happens in that way??

Could you please  find some time form your precious routine to answers?

Regard

Hassan

Thank you soo much Prof. Baig . Really appreciate on your spontaneous helpful reply. I am on scholarship started my PhD from Canada this year. Initially Its difficult to understand some terms which i am not familiar with. I feel honoured from your response. Seeking for your help in Future .. Thanks again JazkAllah

B Regards

Hassan 

Dear Prof 

During Pulse Laser deposition of Pt thin film, I observe the XRD intensity continuously increasing. The number pulses are same for each deposition (which means rate of ablation is same for all deposition).  If the ablation rate is same Intensity should be same for every deposited thin film but it was not. I was changing the substrate temperature form RT to 600C for each deposition. Is this question is justified by crystallinity of the thin films?

Regards

Hassan 

Dear Prof. yes its Excimer laser 248nm , 20HZ, 40,000 Pulses. 

By Gaussion Fitting I Can observe that the FWHM is decreases at 600C.

Hassan

You can decrease the power of laser incident in liquid and also increase the thickness of solution above the target during laser ablation process.