Plasmon driven superfluorescence

Rigorous numerical simulations of Maxwell-Bloch equations in two-dimensions. Setup consists of thin silver film with subwavelength slit filled with three level atoms. System is NOT exposed to any external excitations but rather inverted, i.e. all the atoms are assumed to be in the excited state. System then is driven by low intense white Gaussian noise, which represents spontaneous emission. Depending on parameters of the systems [mainly on density of atoms in slits] material randomly produces highly intense bursts of coherent radiation know as superfluorescent pulses, intensity of which is proportional to the square of atomic density. Note that metal significantly increases intensity amplitude. Movie shows superflourescent pulse intensity clearly demonstrating the importance of surface plasmon waves.

Category:

Science & Technology

Tags:

• plasmonics
• nano-optics
• FDTD
• Maxwell-Bloch equations