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Electrons get excited to different energy levels when photons of specific frequencies fall on them.But, is there other particles which absorb the energy of the photons?

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Yes, photons are the mediators of the electric force, and so they interact with any particle with non-zero charge. –  David H Nov 10 '13 at 13:21
    
@DavidH Sir, are the particles that pop in and out of existence which constitute vacuum charged? –  Rajath Krishna R Nov 10 '13 at 13:36
    
Sure. Electrons and positrons for example. –  David H Nov 10 '13 at 13:39
    
@DavidH, particles with magnetic dipole moment, too, no? –  lionelbrits Nov 10 '13 at 14:14

2 Answers 2

Yes, for example nuclei can be resonantly excited in magnetic fields with photons from the radio frequency band, like in NMR.

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Yes, photons are the interactors of electromagnetic force, so they interact with every particle that has non 0 charge or non 0 magnetic angolar momentum. That means both spin (intrinsic angolar momentum) or orbital angular momentum.

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