The concept/signifacance of electric/magnetic moments

by SpaceKidd_N7
Tags: metamaterials, toroidal dipole, toroidal moment
SpaceKidd_N7 is offline
Jul21-13, 07:13 PM
P: 6

I would like to know what exactly the concept is behind electric/magnetic moments.

Just to give a little context, I'm currently doing an internship for the summer and my research deals with toroidal dipoles in metamaterials. I'm just having a hard time understanding what a toroidal dipole does to light that is different to electric/magnetic dipoles.

I know electric/magnetic moments can be used to calculate the fields and energy of dipoles, but I'm having a hard time understanding what a toroidal moment can be used for. Calculating the field or energy of a toroidal dipole? I figured that if understand the main concept behind electric/magnetic moments, then maybe I could better understand the toroidal moment. From what I've read, toroidal dipoles are non-radiating, so does that mean they do not generate fields around them?

I've read that metamaterials that generate a toroidal dipole have low energy loss. If anyone is knowledgeable of metameterials and how they work, could you also explain why that is and what that means? Like what's happening to the electro-magnetic wave as it passes through a metamaterial that is structured in a way that generates a toroidal dipole and how is that different to metameterials that only generate magnetic dipoles?

Thank you very much in advance for taking the time to help me.
Phys.Org News Partner Physics news on
Physicists design quantum switches which can be activated by single photons
'Dressed' laser aimed at clouds may be key to inducing rain, lightning
Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser

Register to reply

Related Discussions
what simple concept am I missing about moments? Mechanical Engineering 7
Whats the Concept behind "change of electric/magnetic flux"? Classical Physics 8
Magnetic moments Advanced Physics Homework 1
Concept Question - Electric Potential, and Electric Fields Introductory Physics Homework 8
Magnetic Moments - signs Introductory Physics Homework 0