Transient Density-Induced Dipolar Interactions in a Thin Vapor Cell

Manipulating the dipolar interactions and cooperative effects in confined geometries

“…At high laser intensities, the density of this 2D sample can be large and the light-induced DDI effects can be studied. This has been recently observed in [2], where the scaling with the transition strength has been studied, by confirming the quadratic scaling of the lineshift between the D 1 (795 nm) and D 2 (780 nm) transitions in rubidium.…”

“…In certain situations, cold and thermal atomic clouds can be confined very close to macroscopic surfaces, such as wedged vapor cells [1,2], nano-fibers [3,4], or atom-cladded nanophotonic devices [5][6][7][8][9][10][11][12][13]. In these cases, the electromagnetic characteristics of the macroscopic surroundings influence the interactions between the atomic dipoles.…”

Analyzing the collective emission of a Rydberg-blockaded single-photon source based on an ensemble of thermal atoms

“…The first is the standard Maxwell-Boltzmann distribution at T = 200 • C, where we assume random starting positions and a Gaussian velocity distribution in each direction. The second is produced by light-induced atomic desorption (LIAD) [38,39], where a completely offresonant laser pulse releases atoms that are sticking at the cell walls. For the distribution in the LIAD case, these atoms are emitted orthogonal to the glass cell walls (here also parallel to the desorption laser), leading to a directional velocity distribution P(v, θ ) = av 2 exp(− v 2 b 2 ) cos(θ ), where we choose the parameters a = 1.1×10 −7 s 3 /m 3 and b = 271 m s −1 according to Ref.…”

“…For the distribution in the LIAD case, these atoms are emitted orthogonal to the glass cell walls (here also parallel to the desorption laser), leading to a directional velocity distribution P(v, θ ) = av 2 exp(− v 2 b 2 ) cos(θ ), where we choose the parameters a = 1.1×10 −7 s 3 /m 3 and b = 271 m s −1 according to Ref. [39]. With that, we can calculate the time-dependent average number of atoms which have not collided into the cell walls…”

Saturated absorption spectrum of cesium micrometric-thin cell with suppressed crossover spectral lines

“…UTCs in thickness range of 20-3000 nm are often referred to as nanometric-thin cells, while those in range of 20-900 µm are often referred to as micrometric-thin cells. [1] Because of their distinct structure, UTCs can exhibit numerous novel physical properties and are used to explore Dicke narrowing effect, [2] atom-surface van der Waals interaction, [3] Lamb shift, [4] hyperfine Paschen-Back regime, [5] the suppression of crossover lines in saturated absorption spectrum, [6] coherent excitation of Rydberg atoms, [7] limits of distribution of atomic velocities, [8] lightinduced atomic desorption, [9] and spectroscopy of hot alkali dimer vapor, [10] and have remarkably high potential value in fields like superluminal propagation, [11] compact atomic clocks, [12] strong magnetic field sensing, [13] atomic narrowband filtering, [14] atomic pressure gauges, [15] micromechanical resonator systems, [16] RF electric field sensing, [17] and laser frequency stabilization. [18] Although MCs can hardly exhibit pronounced Dicke narrowing and surface potential effects like nanocells, MCs are easier to fabricate, require lower heating temperature, and possess greater absorption under the same experimental conditions, which omits the acquisition of first and second derivative spectra commonly used in nanocells.…”