| 書目名稱 | Coherent Light-Matter Interactions in Monolayer Transition-Metal Dichalcogenides | | 編輯 | Edbert Jarvis Sie | | 視頻video | http://file.papertrans.cn/230/229208/229208.mp4 | | 概述 | Nominated as an outstanding Ph.D. thesis by Massachusetts Institute of Technology, USA.Presents results that are vital for the emerging field of valleytronics.Offers insights into the novel optical an | | 叢書名稱 | Springer Theses | | 圖書封面 |  | | 描述 | This thesis presents optical methods to split the energy levels of electronic valleys in transition-metal dichalcogenides (TMDs) by means of coherent light-matter interactions. The electronic valleys found in monolayer TMDs such as MoS2, WS2, and WSe2 are among the many novel properties exhibited by semiconductors when thinned down to a few atomic layers, and have have been proposed as a new way to carry information in next generation devices (so-called valleytronics). These valleys are, however, normally locked in the same energy level, which limits their potential use for applications. The author describes experiments performed with a pump-probe technique using transient absorption spectroscopy on MoS2 and WS2. It is demonstrated that hybridizing the electronic valleys with light allows one to optically tune their energy levels in a controllable valley-selective manner. In particular, by using off-resonance circularly polarized light at small detuning, one can tune the energy level of one valley through the optical Stark effect. Also presented within are observations, at larger detuning, of a separate contribution from the so-called Bloch--Siegert effect, a delicate phenomenon th | | 出版日期 | Book 2018 | | 關(guān)鍵詞 | time-resolved absorption spectroscopy; angle-resolved absorption spectroscopy; coherent light-matter i | | 版次 | 1 | | doi | https://doi.org/10.1007/978-3-319-69554-9 | | isbn_softcover | 978-3-319-88799-9 | | isbn_ebook | 978-3-319-69554-9Series ISSN 2190-5053 Series E-ISSN 2190-5061 | | issn_series | 2190-5053 | | copyright | Springer International Publishing AG 2018 |
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