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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Spin angular momentum of light ： ウィキペディア英語版 Spin angular momentum of light The spin angular momentum of light (SAM) is the component of angular momentum of light that can be associated with the wave's circular or elliptical polarization. == Introduction == An electromagnetic wave is said to have circular polarization when its electric and magnetic fields rotate continuously around the beam axis during the propagation. The circular polarization is left ($L$) or right ($R$) depending on the field rotation direction (but be careful that both conventions are used in science, depending on the subfield). When a light beam is circularly polarized, each of its photons carries a spin angular momentum of $\backslash pm\backslash hbar$, where $\backslash hbar$ is the reduced Planck constant and the $\backslash pm$ sign is positive for Left and negative for Right circular polarizations (this is adopting the convention most commonly used in optics). This SAM is directed along the beam axis (parallel if positive, antiparallel if negative). The above figure shows the instantaneous structure of the electric field of left ($L$) and right ($R$) circularly polarized light in space. The green arrows indicate the propagation direction. The mathematical expressions reported under the figures give the three electric field components of circularly polarized plane wave propagating in the $z$-direction, in complex notation. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Spin angular momentum of light」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.