In literature, I read:"(exposed in a beam of light) in floquet theory, the quasi-static eigenvalue spectrum at finite driving field A shows copies of the original bands shifted by integer multiples of ##\Omega##, the so-called Floquet sidebands"(adsbygoogle = window.adsbygoogle || []).push({});

I have read something about floquet theory and found out that quasienergy is uncertain by integer multiples of ##\hbar \Omega##. However, I cannot understand why quasienergy band should be the shape of original band.

Can anyone help me?

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# What is a floquet (optical) sideband?

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