Interaction of surface plasmon waves with a gas of atoms

Results of numerical integration of Maxwell-Bloch equations. A layer of 3-level atoms is exposed to 100 fs plasmon wave generated at the top of the screen via thin silver film with periodic slits. Movie represents dynamics of atomic population. Here red color shows atoms in the excited state, while dark blue regions reveal atoms in the ground state. Right after about 100 fs extern EM field is gone but the atomic layer still produces secondary EM field, which eventually decays due to dephasing and relaxation.

Category:

Science & Technology

Tags:

• FDTD
• plasmonics
• Maxwell-Bloch equations