Nanomeghyas

Nanomeghyas

Tunable atomic filter based on atom-plasmon coupling

Document Type : Original Article

Authors
Seyedeh Mehri Hamidi 1
Mohammad Mosleh 2
Maliheh ranjbaran 3
mahnaz Salmanpour 4
1 Shahid Beheshti university
2 Shhaid beheshti university
3 Islamic Azad university
4 Shahid Beheshti University
Abstract
Confinement of light at nanoscale dimensions in atomic plasmonic structures has many applications such as atomic line filters. In such coupled resonant systems, broad plasmonic resonance in contrast to narrow atomic resonance gives rise to reflection atomic spectroscopy with high resolution and very fine filter audiences. In this paper, an atomic-plasmonic cell was modeled and fabricated and the reflection from a thin gold layer in the vicinity of the rubidium vapor in Kretschmann configuration was measured by frequency modulation setup. By tuning the angle of incidence of light we could change the frequency of resonance of surface plasmon-polariton mode from the central frequency of atomic resonance lines, so the EIT to Fano resonance phenomena and vice versa have been observed. So, the EIT-like phenomena was introduced as an atomic line filter, controllable with light entrance angle.
Keywords
Atomic-plasmonic resonant interaction
Rubidium atom
Tunable filter
Fano resonance
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  • Receive Date 08 November 2021
  • Revise Date 19 February 2022
  • Accept Date 09 April 2022