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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report a large g-factor tunability of a single hole spin in an InGaAsquantum dot via an electric field. The magnetic field lies in the in-planedirection x, the direction required for a coherent hole spin. The electricalfield lies along the growth direction z and is changed over a large range, 100kV/cm. Both electron and hole g-factors are determined by high resolution laserspectroscopy with resonance fluorescence detection. This, along with the lowelectrical-noise environment, gives very high quality experimental results. Thehole g-factor g_xh depends linearly on the electric field Fz, dg_xh/dFz = (8.3+/- 1.2)* 10^-4 cm/kV, whereas the electron g-factor g_xe is independent ofelectric field, dg_xe/dFz = (0.1 +/- 0.3)* 10^-4 cm/kV (results averaged over anumber of quantum dots). The dependence of g_xh on Fz is well reproduced by a4x4 k.p model demonstrating that the electric field sensitivity arises from acombination of soft hole confining potential, an In concentration gradient anda strong dependence of material parameters on In concentration. The electricfield sensitivity of the hole spin can be exploited for electrically-drivenhole spin rotations via the g-tensor modulation technique and based on theseresults, a hole spin coupling as large as ~ 1 GHz is expected to be envisaged.

Electrically-tunable hole g-factor of an optically-active quantum dot for fast spin rotations