研究目的
Investigating the acceleration of quasiparticles inside solids by intense lightwaves and the subsequent emission of high-harmonic or high-order sideband radiation, with a focus on implementing a quasiparticle collider and demonstrating lightwave-induced switching of the valley pseudospin in monolayer transition metal dichalcogenides.
研究成果
The study demonstrates the ballistic acceleration and collision of coherent electrons and holes in a solid, analogous to conventional collision experiments, and introduces lightwave control of the valley pseudospin in monolayer transition metal dichalcogenides. This opens the opportunity to process quantum information on optical cycle scales.
研究不足
The study is limited by the current experimental geometry's ability to transfer valley-polarized electron-hole pairs, with a predicted but not yet achieved fidelity of 96% for slightly improved conditions.
1：Experimental Design and Method Selection:
The study uses intense lightwaves to accelerate quasiparticles in solids, employing a combination of near-infrared excitation pulses and intense multi-THz fields to study electron-hole collisions and valley pseudospin switching.
2：Sample Selection and Data Sources:
Bulk tungsten diselenide and monolayer transition metal dichalcogenides are used as samples.
3：List of Experimental Equipment and Materials:
Ultrashort near-infrared pulses, multi-THz pulses, and monolayer samples of transition metal dichalcogenides.
4：Experimental Procedures and Operational Workflow:
The experiments involve generating coherent electron and hole wave packets with a near-infrared pulse and accelerating them with a multi-THz field to observe collisions and valley pseudospin switching.
5：Data Analysis Methods:
Quantum mechanical models and semiconductor Bloch equations are used to analyze the results.
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