全篇論文首先研究雙三角架系統的理論，接著提出實驗數據，率先驗證自旋子慢光的理論並且利用光儲存的方式展示最新的應用方向。電磁引發的透明(EIT)是一個量子干涉的現象，使得一個光子即使本身處在共振頻率上，也可以完好的通過一個介質，或者也可以說介質對它而言是完全透明的。然而，因為很大的色散效應，這顆光子的群速度驚人的減慢了。基本的模型的系統是由一道探測光和一道偶合光驅動的能階系統，其中只形成單頻的探測光。我們進一步擴展基本的結構，在其中添加一個激發態和一個基態，形成一個五能階組成的雙三角架系統，有兩道探測光和四道偶合光等六道光與相應能階共振。因為六波混頻的效果，在雙三角架系統中的慢光，其探測光的能量可以從一道轉換到另外一道，其中的效應可以類比於自旋系統中的自旋向上和自旋向下之間的轉換關係。
在理論上我們研究這個雙頻率分量的自旋子慢光，而且進一步和能階和能階下的系統比較。在雙三角架系統中，道偶合光的相對相位可以改變波向量(wave vector)；在相位為時，使介質中兩個傳遞的模態都據有EIT透明的效果。可以從兩道探測光的輸出能量的震盪現象得知這兩個傳遞的模態的干涉行為。
更進一步，我們在實驗系統上利用雙光子失諧(two-photon detuning)頻率的調變，觀察到上述的震盪行為。我們存自旋子慢光到介質中，發現雙三角架系統就像是一個干涉儀，可以應用在頻率上的精密測量。我們也展示一個可能的雙色光量子位元的暫存器或調變器的應用。我們的研究工作在EIT領域上開拓了一個重大領程碑，為量子光學的應用的開啟更廣的發展方向。

The purpose of the thesis is to study the properties of a double-tripod system theoretically, and then demonstrate experimentally the first measurement of spinor slow light and its new applications of the system via the light storage manipulation. Electromagnetically induced transparency (EIT) is a quantum interference phenomenon, in which a photon at the resonant frequency can pass through a medium perfectly, as if it is completely transparent. Furthermore, the group velocity of photons dramatically reduce due to a large dispersion of refraction index. A typical single- EIT system consists of three energy levels driven by a probe and a coupling field, forming a slow light with single frequency component. We extend the single- configuration by additionally adding an excited state and a ground state to form the five-energy-level double-tripod system, which is driven by six fields made up of two probes and four coupling beams. Due to the six-wave-mixing process in the double-tripod scheme, the energy conversion from one probe field to another is analog to the transformation from spin up to spin down in the spin 1/2 system.
We theoretically study the propagation modes of the two-component spinor slow light and compare its properties to those of 3-level and 4-level EIT systems. In double-tripod scheme, the relative phase between coupling fields makes the wave vectors flexible, and results in the transparency for both propagation modes at phase equal to . An oscillation of energy between the two frequency components of the spinor illustrates the interference of the two transparent modes.
Moreover, we experimentally observed the oscillation behavior by manipulating the two-photon detunings of both induced atomic ground-state coherences. We store the spinor slow light into the medium and found that the double-tripod system behaves like an interferometer which is feasible for the precision measurement of frequency detuning. We also demonstrate a possible application of a quantum memory or rotator of a two-color qubit. Our work is a milestone in the research of EIT systems and opens a new avenue in the application of quantum optics.

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