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Selective reflection from Rb layer with thickness below $λ$/12 and applications (1702.07871v1)
Published 25 Feb 2017 in physics.atom-ph
Abstract: We have studied the peculiarities of selective reflection from Rb vapor cell with thickness $L <$ 70 nm, which is over an order of magnitude smaller than the resonant wavelength for Rb atomic D$_1$ line $\lambda$ = 795 nm. A huge ($\approx$ 240 MHz) red shift and spectral broadening of reflection signal is recorded for $L =$ 40 nm caused by the atom-surface interaction. Also completely frequency resolved hyperfine Paschen-Back splitting of atomic transitions to four components for ${87}$Rb and six components for ${85}$Rb is recorded in strong magnetic field ($B >$ 2 kG).