Tunneling control of cavity linewidth narrowing via quantum interference in triangular quantum dot molecules |
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| Authors: | Si-Cong Tian Ren-Gang Wan En-Bo Xing Yong-Qiang Ning |
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| Affiliation: | 1. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Chinatiansicong@ciomp.ac.cn;3. State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an, China;4. State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, China;5. Graduate School of the Chinese Academy of Sciences, Beijing, China |
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| Abstract: | A scheme for tunneling control of cavity linewidth narrowing by quantum interference in triangular-type triple quantum dots (TQDs) is proposed. In such system, quantum interference induced by tunneling between the TQDs can result in the appearance of two transparency windows and a steep dispersion. Furthermore, when the sample is embedded in a ring cavity, an ultranarrow transmission peak is obtained within the narrowed transparency windows. And by varying the tunneling, the linewidth and the position of the ultranarrow transmission peak can be engineered. Because no coupling laser is required, the scheme proposed here is more convenient for future experiments and applications in optics, and may be useful in designing novel optoelectronic devices. |
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| Keywords: | triple quantum dots quantum interference electromagnetically induced transparency cavity transmission spectrum linewidth narrowing |
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