A diffraction limited Fabry-Perot cavity with a strongly focused mode
Başlık çevirisi mevcut değil.
- Tez No: 403371
- Danışmanlar: Prof. CHRISTIAN KURTSIEFER
- Tez Türü: Doktora
- Konular: Fizik ve Fizik Mühendisliği, Physics and Physics Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2014
- Dil: İngilizce
- Üniversite: National University of Singapore (NUS)
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 138
Özet
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Özet (Çeviri)
This thesis investigates a near-concentric cavity with a strongly focused mode for achieving strong interaction of cavity eld with a single atom in the perspective of cavity quantum electrodynamics (QED) experiments. The di raction loss limits the nesse of the cavity at the near-concentric regime. In order to observe the drop in nesse due to di raction loss in the near-concentric regime, a cavity with plano-concave mirrors is formed. The experiment results shows that, aberrations in the optical system cause the coupling of the input mode to higher order modes and limit the cou- pling to the fundamental mode of the cavity. Modes of a near-concentric cavity are very close to each other. The modes eventually overlap and the overall transmission linewidth appears to be broadened. This e ect makes it dicult to observe cavity QED phenomena. A numerical simulation of the experiment was performed to quantify the a ect of the aberrations to the linewidth broadening. The input optical mode is decomposed into the ( rst 50) modes of the cavity. It is concluded that one needs to eliminate the aberrations in order to perform cavity QED experiments. We suggest an anaclastic cavity mirror design such that the mode-matching is done with one surface and the second surface is a cavity mirror. Exper- iment results of this cavity show that the cavity is di raction limited, and aberrations are not signicant to a ect the transmission linewidth ( nesse). Estimated cavity QED parameters of this cavity shows that large cavity- single atom cooperativity values up to 150 should be achievable. This shows that there is no need for sophisticated dielectric coatings of the mirror sur- face or ber-based cavity systems for achieving strong interaction of cavity with a single atom. The fact that this cavity has large mirror separation and cavity volume makes it possible to form a magneto-optical trap (MOT) at the center of the cavity. In order to demonstrate this, we formed a MOT at the center of the cavity. The observation of MOT at the center of the anaclastic cavity shows that it is feasible to perform cavity QED experiments with this setup. Large mirror seperation is also advantageous for ion trap QED since the mirror surfaces are far apart, which eliminates the problem of mirror charging.
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