Physics, asked by bhasan8480, 1 year ago

Why is two photon absorption a third order process?

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Answered by ʙʀᴀɪɴʟʏᴡɪᴛᴄh
1

Answer:

Two-photon absorption (TPA) is a third order nonlinear optical phenomenon in which a molecule absorbs two photons at the same time. The transition energy for this process is equal to the sum of the energies of the two photons absorbed.

Answered by Anonymous
52

Answer:

Two-photon absorption (TPA) is a third order nonlinear optical phenomenon in which a molecule absorbs two photons at the same time. The transition energy for this process is equal to the sum of the energies of the two photons absorbed

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