Photonics

Photonics

Phase array effect in FDTD

    • MANNAN
      Subscriber
      Dear ConcernnI am new to FDTD and need to know how to make an array of dipoles along the x-axis using analysis group and scripting. I need to manipulate the parameter of the dipole in frequency domain-like (center frequency, offset bandwidth and pulse width).nI need to study the interaction of two dipoles or I want to start with phase array effect nIt will be very nice if I can get an example to start with. nLooking forward to reading the discussion RegardsnMannann
    • Taylor Robertson
      Ansys Employee
      Hello Mannan,nnThis sounds like an interesting test, and FDTD will naturally account for coherent phenomenon. In the OLED examples, we employ techniques to explore the incoherent effects. Unfortunately there we do not provide an existing analysis group that accomplishes this. The closest thing we have would be the random dipole cloud available in the object library. nYou could certainly modify this to create a regular coherent phased array. Alternatively and maybe simpler, you could use an array structure group modifying the script to add dipole sources instead of structure.nThe set-up of a linear array should be very simple, and you may want to start from scratch. For an array with uniform spacing dx and phase offset dphi, this might look like.nfor(i=1:N_dipole){n adddipole;n set('x',dx*(i-1));n set('phase',dphi*(i-1));}nnBest,n
    • MANNAN
      Subscriber
      Dear troberts nThanks a lot for your help. I will definitely work on your suggestions and will let you know if I need further your suggestions.nRegarding updating the dipole properties by script as you have mentioned nfor(i=1:N_dipole){n adddipole;n set('x',dx*(i-1));n set('phase',dphi*(i-1));}nhow to further update the dipole properties like frequency, band width , pulse type (broadband) pulse length, and offset.nI need to simulate with particular properties of dipole. ncould you please let me know a sample, FOR LOOP for make a dipole which include frequency, band width , pulse type (broadband) pulse length, and offset.nIs it possible to add such parameters using the set command like shown below.nlooking forward to hear from you soonnThanks a lot and regards nn?set('center frequency', number)nset('pluse type', number)nset('offset', number)
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