Kaleem Ullah

21 Questions 51 Answers 0 Followers

Questions related from Kaleem Ullah

How can we measure the third order nonlinear susceptibility (Chi 3 ) if we just know the input power in mW and output power in photon counts???

Hello dear researchers, I want to measure the value of the third-order nonlinear susceptibility (Chi3). I have only the third harmonic generation (THG) spectra in photon counts and I know the...

10 December 2019 953 6 View

Monolayer of MoTe2 using mechanical Exfoliation?

Hello dear researchers, has anyone experience in obtaining the monolayer of material MoTe2 successfully by the mechanical exfoliation method ?? I have tried a lot of times, but the best thinner...

10 September 2018 5,222 4 View

How tightly focused beam affect measuring the Circular Dichroism spectra??

Hello dear researchers, I am using dark field illumination to get the reflection signal for the left hand and right hand circular polarized light using a 0.90 NA, 100x Objective. I have read that...

14 October 2017 9,991 0 View

Polarization modulation adds information to the Super resolution?

Hello dear researchers, Is that true, due to the modulation, we can map the weak signals and alone with modulation, we can get super-resolution??? If we can get the weak signals by using...

19 September 2017 1,417 0 View

Near Field and Far field Imaging with same simulation area??

I have already used COMSOL, FDTD, and CST software, But they do not offer to map the near and far field distribution at the same simulation area around the particle. Is there any way to simulate...

17 August 2017 3,391 2 View

How can I measure the linear degree of polarization at 90 degrees?

Hello, I have a microscopic system as shown in attached figure. I want to measure the linear degree of polarization at 90 degrees. How can I measure it? Acoording to our parametric solution the...

15 September 2016 8,677 10 View

Effect of substrate on near field scattering?

Hello dear researchers, I am using polarization parametric system whose base is on the anisotropy. I want to ask your experience, ideas and comments that if i have some material nano-particles...

22 June 2016 259 8 View

What is the easiest way to run DDA code on Windows???

Hello, guys , I want to use DDA code on windows, someone told me it's better to use Linux for it, is like that??? What are its limitations in your point of view?? what is the easiest way to run...

03 April 2016 7,656 2 View

Calculations of electric field components of the flourescence intensity???

Suppose I have a fluorescence intensity image which having data like 2000*2000*8unit. How can I calculate the Ex, Ey and Ez of that intensity image? Any suggestions???

28 February 2016 8,379 4 View

Why there is no detailed good online course on Wave Optics or Geometrical Optics or general on Optics???

Now a days everyone focus on astrophysics like black holes, Universe, Relativity.That is why there are a lot of online programs , courses available from which one can easily understand these...

25 February 2016 3,541 6 View

Can anyone please tell me what information we can get from the following image??

Hello everyone, i have sample of oral skin of human effected from cancer. Due to no background of the biology, i am unable to get info from the image. I shall be very thankful to him/her(...

18 February 2016 1,570 7 View

Polarization states by assuming particle nature of light?

Hello everyone, i did not understand why we are finding polarization states by assuming light as a wave? Don't you think that if we assume light also particle i.e photon then by using quantum...

07 February 2016 3,467 6 View

How can I minimize azimuthal variation?

Hello every one hope so you all will be doing good work.. i want to ask a question i have got experimental results in which i have near field distribution around a nano-particle about one...

15 December 2015 9,245 2 View

Any advice on an exact conversion of data into image in MATLAB?

Hi everyone i am the beginner in MATLAB. I am using FDTD software.After the simulation when i get image from FDTD is different when i export the data from the FDTD image into a Data matrix and...

14 November 2015 3,981 3 View

Can we make the same image in matlab as we made it in Comsol by exporting the data?

Hi all! I am using COMSOL 5, i have done some simulation related to the near field scattering now when i have exported data from the comsol and put it into the matlab and tried to plot it as image...

12 October 2015 2,283 10 View

How can I change the lumeric FDTD code into MATLAB code?

I would like a code from lumeric FDTD and I would like to convert that code into MATLAB code. How can I do that? I would like to find the function of my simulations so for this I have to convert...

06 May 2015 6,815 2 View

How do I get the code from Lumerical FDTD?

Hello everyone , How to get the code from the Lumeric FDTD after performing the simulations?

05 May 2015 2,989 6 View

Any suggestions to define a new material to FDTD?

Hello every one i have come to know that how to define the materials in FDTD(Lumeric) but for this we have to define Real and imaginary part of refractive index for the range of 400 nm to 700...

31 March 2015 8,362 5 View

How do I calculate the gas concentration in PPM?

I have asked two times the following question:I want to calculate the gas concentration, in ppm, in the closed chamber of volume 1025 cm3. I have a cylinder of mixture of NH3 and air with the 10...

28 February 2015 3,765 6 View

How can I find the concentration of gas with provided flow rate in a fixed volume static chamber?

How can I find the concentration (or PPM) of gas with provided flow rate in a fixed volume static chamber (or cylinder or vessel)?

12 February 2015 7,919 4 View

Evanescent Waves Do Not Contribute to the Far Field?

Except for Some Special Directions Non-Spherical Field or Other Broad Class of Fields.What you think kindly share your concept and personal experience

14 January 2015 8,335 3 View