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1 March 2019 Tuning the surface Casimir-Polder interaction
Eng Aik Chan, Giorgio Adamo, Syed Abdullah Aljunid, Athanasios Laliotis, Martial Ducloy, Nikolay Zheludev, David Wilkowski
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Proceedings Volume 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology; 109342X (2019) https://doi.org/10.1117/12.2515408
Event: SPIE OPTO, 2019, San Francisco, California, United States
Abstract
Atoms are extremely accurate resonators. This property serves to build up precise sensors for time keeping, accelerometer and many others. However, their accuracy depend on their environment. For example, at the vicinity of a surface (metallic or dielectric) the atomic resonances are shifted by the Casimir-Polder interaction. The spatial dependency of this interaction (1/z3, in the non retarded regime) can be a crucial limitation for the development of compact sensors at the micrometer size scale. To address this issue, we explore the tunability property of the Casimir- Polder interaction with resonant surface plasmon modes. These latter are generated using nano-structured metallic layers. We found that the atomic resonance shift can be almost suppressed and the Purcell factor enhanced. More recently, we investigate quadrupole atomic transitions in surface plasmon. Those transitions are extremely weak in vacuum (~1 Hz) but can be enhanced if the spatial variation of the electromagnetic field become stronger as expected with localized surface plasmons. In this context, we will present our results, obtained with a cesium vapor, and discuss the potential application of creating new excitation channels in atomic spectrum.
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Eng Aik Chan, Giorgio Adamo, Syed Abdullah Aljunid, Athanasios Laliotis, Martial Ducloy, Nikolay Zheludev, and David Wilkowski "Tuning the surface Casimir-Polder interaction", Proc. SPIE 10934, Optical, Opto-Atomic, and Entanglement-Enhanced Precision Metrology, 109342X (1 March 2019); https://doi.org/10.1117/12.2515408
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KEYWORDS
Reflectance spectroscopy
Casimir-Polder interaction
Cesium
Interfaces
Spectroscopy
Dielectrics
Doppler effect
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