Ultrafast room-temperature valley manipulation in silicon and diamond.

ABSTRACT: Some semiconductors have more than one degenerate minimum of the conduction band in their band structure. These minima-known as valleys-can be used for storing and processing information, if it is possible to generate a difference in their electron populations. However, to compete with conventional electronics, it is necessary to develop universal and fast methods for controlling and reading the valley quantum number of the electrons. Even though selective optical manipulation of electron populations in inequivalent valleys has been demonstrated in two-dimensional crystals with broken time-reversal symmetry, such control is highly desired in many technologically important semiconductor materials, including silicon and diamond. We demonstrate an ultrafast technique for the generation and re

SUBMITTER: Gindl A 

PROVIDER: S-EPMC12176610 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature