کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5427074 1508615 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electromagnetic scattering and emission by a fixed multi-particle object in local thermal equilibrium: General formalism
ترجمه فارسی عنوان
پراکندگی الکترومغناطیسی و انتشار آن توسط یک جسم ثابت چند ذره در تعادل حرارتی محلی: فرمالیسم عمومی
کلمات کلیدی
پراکندگی الکترومغناطیسی، انتشار گرما، الکترودینامیک تابشی، معادله انتگرال حجم انتشار پراکنده، معادلات پراکندگی چند ذره،
موضوعات مرتبط
مهندسی و علوم پایه شیمی طیف سنجی
چکیده انگلیسی


- We analyze electromagnetic scattering and emission by a finite object.
- The main axioms of fluctuational electrodynamics (FED) are summarized.
- The general scattering-emission problem for a fixed object is formulated.
- Fundamental corollaries of FED are derived and discussed.
- We show that computing self-emitted field and solving for elastic scattering can be separated.

The majority of previous studies of the interaction of individual particles and multi-particle groups with electromagnetic field have focused on either elastic scattering in the presence of an external field or self-emission of electromagnetic radiation. In this paper we apply semi-classical fluctuational electrodynamics to address the ubiquitous scenario wherein a fixed particle or a fixed multi-particle group is exposed to an external quasi-polychromatic electromagnetic field as well as thermally emits its own electromagnetic radiation. We summarize the main relevant axioms of fluctuational electrodynamics, formulate in maximally rigorous mathematical terms the general scattering-emission problem for a fixed object, and derive such fundamental corollaries as the scattering-emission volume integral equation, the Lippmann-Schwinger equation for the dyadic transition operator, the multi-particle scattering-emission equations, and the far-field limit. We show that in the framework of fluctuational electrodynamics, the computation of the self-emitted component of the total field is completely separated from that of the elastically scattered field. The same is true of the computation of the emitted and elastically scattered components of quadratic/bilinear forms in the total electromagnetic field. These results pave the way to the practical computation of relevant optical observables.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 200, October 2017, Pages 137-145
نویسندگان
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