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Nanophotonic hybridization of narrow atomic cesium resonances and photonic stop gaps of opaline nanostructures
Optics · Submitted 11 Sep 2014
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim As a result the narrow atomic resonances with high finesse (f/df=8E5) dramatically change shape from a usual dispersive shape at the blue edge of a stop gap, to an inverted dispersion lineshape at the red edge of a stop gap.
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The abstract, sentence by sentence
We study a hybrid system consisting of a narrowband atomic optical resonance and the long-range periodic order of an opaline photonic nanostructure. To this end, we have infiltrated atomic cesium vapor in a thin silica opal photonic crystal. With increasing temperature, the frequencies of the opal's reflectivity peaks shift down by >20% due to chemical reduction of the silica. Simultaneously, the photonic bands and gaps shift relative to the fixed near-infrared cesium D1 transitions. As a result the narrow atomic resonances with high finesse (f/df=8E5) dramatically change shape from a usual dispersive shape at the blue edge of a stop gap, to an inverted dispersion lineshape at the red edge of a stop gap. The lineshape, amplitude, and off-resonance reflectivity are well modeled with a transfer-matrix model that includes the dispersion and absorption of Cs hyperfine transitions and the chemically-reduced opal. An ensemble of atoms in a photonic crystal is an intriguing hybrid system that features narrow defect-like resonances with a strong dispersion, with potential applications in slow light, sensing and optical memory.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We study a hybrid system consisting of a narrowband atomic optical resonance and the long-range periodic order of an opaline photonic nanostructure. | contribution 0.91 | 0.65 | 0.05 | asserted 0.92 |
| s1 | To this end, we have infiltrated atomic cesium vapor in a thin silica opal photonic crystal. | method 0.96 | 0.95 | 0.02 | asserted 0.99 |
| s2 | With increasing temperature, the frequencies of the opal's reflectivity peaks shift down by >20% due to chemical reduction of the silica. | result 1.00 | 0.90 | 0.09 | asserted 1.00 |
| s3 | Simultaneously, the photonic bands and gaps shift relative to the fixed near-infrared cesium D1 transitions. | result 1.00 | 0.87 | 0.07 | asserted 1.00 |
| s4 | As a result the narrow atomic resonances with high finesse (f/df=8E5) dramatically change shape from a usual dispersive shape at the blue edge of a stop gap, to an inverted dispersion lineshape at the red edge of a stop gap. | result 1.00 | 0.91 | 0.58 | asserted 1.00 |
| s5 | The lineshape, amplitude, and off-resonance reflectivity are well modeled with a transfer-matrix model that includes the dispersion and absorption of Cs hyperfine transitions and the chemically-reduced opal. | method 0.72 | 0.90 | 0.13 | asserted 1.00 |
| s6 | An ensemble of atoms in a photonic crystal is an intriguing hybrid system that features narrow defect-like resonances with a strong dispersion, with potential applications in slow light, sensing and optical memory. | interpretation 0.91 | 0.21 | 0.41 | asserted 0.81 |
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Original abstract
We study a hybrid system consisting of a narrowband atomic optical resonance and the long-range periodic order of an opaline photonic nanostructure. To this end, we have infiltrated atomic cesium vapor in a thin silica opal photonic crystal. With increasing temperature, the frequencies of the opal's reflectivity peaks shift down by >20% due to chemical reduction of the silica. Simultaneously, the photonic bands and gaps shift relative to the fixed near-infrared cesium D1 transitions. As a result the narrow atomic resonances with high finesse (f/df=8E5) dramatically change shape from a usual dispersive shape at the blue edge of a stop gap, to an inverted dispersion lineshape at the red edge of a stop gap. The lineshape, amplitude, and off-resonance reflectivity are well modeled with a transfer-matrix model that includes the dispersion and absorption of Cs hyperfine transitions and the chemically-reduced opal. An ensemble of atoms in a photonic crystal is an intriguing hybrid system that features narrow defect-like resonances with a strong dispersion, with potential applications in slow light, sensing and optical memory.
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While similar - or even higher - quality factors have been reported [ref] , the advantageous feature of the Cs atoms studied here is that their center frequency varies by less than 1 part in $840.000$ (= 335 THz/0.4 GHz), which is beyond state-of-the-art in nanocavity fabrication.
High-Q silicon photonic crystal cavity for enhanced optical nonlinearities · Atomic features · 0.99
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