Many homes carry much more electrical devices than even five years ago. The rolling brownouts of recent years attributes to the massive use of electricity in this country. But not much has changed in the electrical field, in terms of home use, in the last fifty to one hundred years. But Marin Solijacic, assistant professor of physics at the Massachusetts Institute of Technology, has come up with a way to recharge many devices without the use of wires.

His idea is not something new. Tesla and Edison had actually discussed similar ideas almost a hundred years ago. Actually, if you haven’t read about Tesla, you really need to. Anyway, back to the issue at hand. Solijacic is proposing that electricity be tunneled by use of electromagnetic resonance. This is called evanescent coupling in electromagnetics. It’s similar to resonances in music. If two instruments with the same acoustic resonance are playing the same tune together, you can see the instruments vibrating. It makes me think of string theory – that everything is just a compilation of vibration. Anyway, Solijacic and his team looked into electromagnetic resonance. This allows energy to be transferred between two objects. The researchers looked at ways that they could reduce scattering of the energy. This would allow a truly wireless recharging system. Bring an energy source with a certain electromagnetic resonance near a gadget with the same resonance and let the juice begin to flow.

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