Optical manipulation of valley pseudospin
WebValley exciton polarization has been created in the transition metal dichalcogenide monolayers using excitation by circularly polarized light and has been detected both … http://maxim.ece.illinois.edu/pubs/raginsky_kumar_JOpB01.pdf
Optical manipulation of valley pseudospin
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WebNov 24, 2024 · A variety of strategies have been developed to address the valley pseudospin including optical, electrical, and magnetic methods; nonetheless, they involve either below liquid-nitrogen temperature or an external magnetic field, which increases the cost and complexity of the devices. WebOct 14, 2024 · Thus, the spin-valley locking and the interplay of two inequivalent valleys give rise to valley-dependent optical selection rules [17]. Manipulation of valley pseudospin thus becomes a central theme in the eld of valleytronics. Several methods have been proposed to achieve transient valley polarization such as optical excitations [18{20], by
WebJun 10, 2024 · For practical applications, on-chip access to and manipulation of valley pseudospins is paramount, not only to read out but especially to initiate the valley pseudospin state. Here, we experimentally demonstrate the selective on-chip, optical near-field initiation of valley pseudospins at room temperature. WebThe valley pseudospin in transition metal dichalcogenide (TMDC) monolayers is a promising degree of freedom for such control, with the optical Stark effect allowing for valley-selective manipulation of energy levels in WS2 and WSe2 using ultrafast optical pulses.
WebNov 24, 2024 · A variety of strategies have been developed to address the valley pseudospin including optical, electrical, and magnetic methods; nonetheless, they involve either below … WebThe valley pseudospin at the K and K′ high-symmetry points in monolayer transition metal dichalcogenides (TMDs) has potential as an optically addressable degree of freedom in …
WebApr 30, 2014 · The optical orientation of excitonic valley pseudospin can be represented using the Bloch sphere ( Fig. 3g–i ), where the poles correspond to valley polarization and …
WebApr 7, 2024 · Request PDF On Apr 7, 2024, Mandeep Khatoniar and others published Optical Manipulation of Layer–Valley Coherence via Strong Exciton–Photon Coupling in Microcavities Find, read and cite ... chingford pc worldWebJun 24, 2024 · The valley band topology and valley-contrasting physics described earlier serve as the basis for various phenomena and applications in both electronic valley materials and photonic valley systems. These nice properties point to the fact that valley is a powerful DOF that can be used for the manipulation of electromagnetic waves with ... chingford peugeotWebSep 19, 2016 · Valley exciton polarization has been created in the transition metal dichalcogenide monolayers using excitation by circularly polarized light and has been … grangetown railway station cardiffWebNov 12, 2016 · Manipulation of valley pseudospins is crucial for future valleytronics. The emerging transition metal dichalcogenides (TMDs) provide new possibilities for exploring the interplay among the quantum degrees of freedom, including real spin, valley pseudospin, and layer pseudospin. chingford pharmacyWebSep 19, 2016 · Valley exciton polarization has been created in the transition metal dichalcogenide monolayers using excitation by circularly polarized light and has been … grangetown school cardiffWebJun 10, 2024 · Nanoscale Optical Addressing of Valley Pseudospins through Transverse Optical Spin Nanoscale Optical Addressing of Valley Pseudospins through Transverse … chingford phone code long distanceWebMonolayer valley semiconductors, such as tungsten diselenide (WSe$_2$), possess valley pseudospin degrees of freedom that are optically addressable but degenerate in energy. Lifting the energy degeneracy by breaking time-reversal symmetry is vital for valley manipulation. This has been realized by directly applying magnetic fields or via pseudo … chingford phone shop