Experimental Investigation of Electromagnetically Induced Transparency in Selective Reflection Spectra

TL;DR

This study explores electromagnetically induced transparency in rubidium vapor nanocells and microcells, comparing reflection and transmission methods, revealing that reflection is more effective in thinner cells, while transmission suits wider cells.

Contribution

It provides a comparative analysis of EIT in selective reflection versus transmission in nanocells and microcells, highlighting optimal conditions for each method.

Findings

Reflection is more effective for cell thickness ≤ 1000 nm.

Transmission works better for wider cells and microcells.

Optimal EIT detection depends on cell thickness.

Abstract

We have investigated electromagnetically induced transparency in the spectrum of selective reflection at the interface of Rb atom vapors and a dielectric nanocell window. A nanocell with atomic vapor column thicknesses ranging from 150 to 1200 nm, as well as a 50~$\mu$m thickness microcell were used. We have compared electromagnetically induced transparency observed for the cases of the selective reflection and transmission. It was demonstrated that for the thicknesses of below $\leq 1000$ nm selective reflection technique is more favorable. In contrast, for wider cells and microcells, using transmitted radiation as probe field is more effective.