角动量
物理
光学
光的轨道角动量
多普勒效应
光的角动量
光束
波长
萨格纳克效应
角速度
观察员(物理)
梁(结构)
总角动量
经典力学
角动量耦合
干涉测量
量子力学
作者
Fiona C. Speirits,Martin P. J. Lavery,Miles J. Padgett,Stephen M. Barnett
出处
期刊:Optics Letters
[The Optical Society]
日期:2014-05-09
卷期号:39 (10): 2944-2944
被引量:27
摘要
It is well established that light carrying orbital angular momentum (OAM) can be used to induce a mechanical torque causing an object to spin. We consider the complementary scenario: will an observer spinning relative to the beam axis measure a change in OAM as a result of their rotational velocity? Remarkably, although a linear Doppler shift changes the linear momentum of a photon, the angular Doppler shift induces no change in the angular momentum. Further, we examine the rotational Doppler shift in frequency imparted to the incident light due to the relative motion of the beam with respect to the observer and consider what must happen to the measured wavelength if the speed of light c is to remain constant. We show specifically that the OAM of the incident beam is not affected by the rotating observer and that the measured wavelength is shifted by a factor equal and opposite to that of the frequency shift induced by the rotational Doppler effect.
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