English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Transient four-wave mixing studies of bulk GaAs under conditions of broadbandwidth excitation of primarily interband transitions have enabledfour-particle correlations tied to degenerate (exciton-exciton) andnondegenerate (exciton-carrier) interactions to be studied. Realtwo-dimensional Fourier-transform spectroscopy (2DFTS) spectra reveal a complexresponse at the heavy-hole exciton emission energy that varies with theabsorption energy, ranging from dispersive on the diagonal, through absorptivefor low-energy interband transitions to dispersive with the opposite sign forinterband transitions high above band gap. Simulations using a multilevel modelaugmented by many-body effects provide excellent agreement with the 2DFTSexperiments and indicate that excitation-induced dephasing (EID) andexcitation-induced shift (EIS) affect degenerate and nondegenerate interactionsequivalently, with stronger exciton-carrier coupling relative toexciton-exciton coupling by approximately an order of magnitude. Thesesimulations also indicate that EID effects are three times stronger than EIS incontributing to the coherent response of the semiconductor.

Signatures of four-particle correlations associated with exciton-carrier interactions in coherent spectroscopy on bulk GaAs