Re: [Meep-discuss] (no subject)
Dear Farhad, from what I recall from tinkering the sources, you will probably want to edit the polarizability.cpp. First of all, there already _is_ a model that includes some random fluctuations; it might suit your needs. If not, modifying the code that implements constitutive relations is the best access point to add new physics, anyway. Beware the MEEP code is optimized for speed, i. e. it is a bit hard to read and many lines are found when one searches for 'yucky'... I believe all other physics can be incorporated into the aforementioned custom routine for polarisation update. Maybe the MEEP authors can give more detailed info... Filip 2014/1/6, FARHAD KAZEMI : > Dear Fillip, > > thank you so much for your answer. Actually, briefly , fluctuational > electrodynamics indicates that, the electromagnetic wave generated by a > surface with finite T>0 of temperature is because of the fluctuation of > charges or dipoles inside the material. It studied this phenomenon > statistically. this kind of fluctuations caus two types of thermal radiation > namely far-field and near-field radiation. far-field radiation is well-known > case which can be predicted easily by some simple radiative heat transfer > equations. However, for the case of near-field we need to apply such concept > ( fluctuational electrodynamics) in our calculations in order to reveal the > near-field radiative heat transfer enhancement occurred between two plates > separated by a nano-distance gap. This phenomenon can be explained due to > the existence of surface polaritons on the interface between surfaces of the > plates. There is a paper describing the application of FDTD for such problem > and > I am trying to recalculate the same thing using MEEP and of course > manipulate some parameters later. > Specifically, can we manipulate the existence code of the MEEP to solve some > other equations (in this case fluctuational electrodynamics) parallely with > Maxwell ewuations? > Additionally, do you have any idea about how can I include the effects of > temperature on the emission of the EM wave from a surface with a finite > temperature? > > Thank you again. sorry if my message is long. > > Farhad > > > > On Monday, January 6, 2014 5:50 PM, Filip Dominec > wrote: > > Dear Farhad, > I am not an expert nor I have thoroughly read the referred > article, > but I believe the non-radiative fields should be exactly modelled by > MEEP as long as they are a solution of the (source-free) Maxwell > equations. You may, for example, define a metallic > capacitor and a > metallic inductor, connect them and you should obtain the realistic > oscillation frequency of this LC circuit. > > You might, however, find out it would be necessary to newly implement > thermal emission and absorption. Maybe even some quantum phenomena > would involve - but, for instance, the Casimir forces have been > implemented in MEEP successfully so even this can be done. > > The article touches a quite interesting topic, by the way. > > Best wishes, > Filip Dominec > > > 2014/1/6, FARHAD KAZEMI : >> > Dear all, >> >> I would > like to model the radiation transfer between two plates >> separated by nano-gap in which we have to bring near-field radiation >> effects into account using fluctuational electrodynamics. >> Does MEEP is capable of solve such problems? or we need to >> manipulate the source C++ codes to introduce near-field equations? >> In fact, I am trying to reproduce the results of the following paper. >> >> Mathieu Francoeur, M. Pinar Menguc, Role of fluctuational electrodynamics >> in >> near-field radiative heat transfer, Journal of Quantitative Spectroscopy & >> Radiative Transfer 109 (2008) 280–293 >> >> Thanks®ards Farha ___ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
Re: [Meep-discuss] (no subject)
Dear Fillip, thank you so much for your answer. Actually, briefly , fluctuational electrodynamics indicates that, the electromagnetic wave generated by a surface with finite T>0 of temperature is because of the fluctuation of charges or dipoles inside the material. It studied this phenomenon statistically. this kind of fluctuations caus two types of thermal radiation namely far-field and near-field radiation. far-field radiation is well-known case which can be predicted easily by some simple radiative heat transfer equations. However, for the case of near-field we need to apply such concept ( fluctuational electrodynamics) in our calculations in order to reveal the near-field radiative heat transfer enhancement occurred between two plates separated by a nano-distance gap. This phenomenon can be explained due to the existence of surface polaritons on the interface between surfaces of the plates. There is a paper describing the application of FDTD for such problem and I am trying to recalculate the same thing using MEEP and of course manipulate some parameters later. Specifically, can we manipulate the existence code of the MEEP to solve some other equations (in this case fluctuational electrodynamics) parallely with Maxwell ewuations? Additionally, do you have any idea about how can I include the effects of temperature on the emission of the EM wave from a surface with a finite temperature? Thank you again. sorry if my message is long. Farhad On Monday, January 6, 2014 5:50 PM, Filip Dominec wrote: Dear Farhad, I am not an expert nor I have thoroughly read the referred article, but I believe the non-radiative fields should be exactly modelled by MEEP as long as they are a solution of the (source-free) Maxwell equations. You may, for example, define a metallic capacitor and a metallic inductor, connect them and you should obtain the realistic oscillation frequency of this LC circuit. You might, however, find out it would be necessary to newly implement thermal emission and absorption. Maybe even some quantum phenomena would involve - but, for instance, the Casimir forces have been implemented in MEEP successfully so even this can be done. The article touches a quite interesting topic, by the way. Best wishes, Filip Dominec 2014/1/6, FARHAD KAZEMI : > Dear all, > > I would like to model the radiation transfer between two plates > separated by nano-gap in which we have to bring near-field radiation > effects into account using fluctuational electrodynamics. > Does MEEP is capable of solve such problems? or we need to > manipulate the source C++ codes to introduce near-field equations? > In fact, I am trying to reproduce the results of the following paper. > > Mathieu Francoeur, M. Pinar Menguc, Role of fluctuational electrodynamics in > near-field radiative heat transfer, Journal of Quantitative Spectroscopy & > Radiative Transfer 109 (2008) 280–293 > > Thanks®ards Farha___ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
Re: [Meep-discuss] (no subject)
Dear Farhad, I am not an expert nor I have thoroughly read the referred article, but I believe the non-radiative fields should be exactly modelled by MEEP as long as they are a solution of the (source-free) Maxwell equations. You may, for example, define a metallic capacitor and a metallic inductor, connect them and you should obtain the realistic oscillation frequency of this LC circuit. You might, however, find out it would be necessary to newly implement thermal emission and absorption. Maybe even some quantum phenomena would involve - but, for instance, the Casimir forces have been implemented in MEEP successfully so even this can be done. The article touches a quite interesting topic, by the way. Best wishes, Filip Dominec 2014/1/6, FARHAD KAZEMI : > Dear all, > > I would like to model the radiation transfer between two plates > separated by nano-gap in which we have to bring near-field radiation > effects into account using fluctuational electrodynamics. > Does MEEP is capable of solve such problems? or we need to > manipulate the source C++ codes to introduce near-field equations? > In fact, I am trying to reproduce the results of the following paper. > > Mathieu Francoeur, M. Pinar Menguc, Role of fluctuational electrodynamics in > near-field radiative heat transfer, Journal of Quantitative Spectroscopy & > Radiative Transfer 109 (2008) 280–293 > > Thanks®ards Farha ___ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
[Meep-discuss] (no subject)
Dear all, I would like to model the radiation transfer between two plates separated by nano-gap in which we have to bring near-field radiation effects into account using fluctuational electrodynamics. Does MEEP is capable of solve such problems? or we need to manipulate the source C++ codes to introduce near-field equations? In fact, I am trying to reproduce the results of the following paper. Mathieu Francoeur, M. Pinar Menguc, Role of fluctuational electrodynamics in near-field radiative heat transfer, Journal of Quantitative Spectroscopy & Radiative Transfer 109 (2008) 280–293 Thanks®ards Farha___ meep-discuss mailing list meep-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
