Ontology highlight
ABSTRACT:
SUBMITTER: Majeed A
PROVIDER: S-EPMC6414654 | biostudies-literature | 2019
REPOSITORIES: biostudies-literature
Majeed Avan A Ivanov Pavlo P Stevens Benjamin B Clarke Edmund E Butler Iain I Childs David D Kojima Osamu O Hogg Richard R
Light, science & applications 20190313
A broadly tunable THz source is realized via difference frequency generation, in which an enhancement to χ<sup>(3)</sup> that is obtained via resonant excitation of III-V semiconductor quantum well excitons is utilized. The symmetry of the quantum wells (QWs) is broken by utilizing the built-in electric-field across a p-i-n junction to produce effective χ<sup>(2)</sup> processes, which are derived from the high χ<sup>(3)</sup>. This χ<sup>(2)</sup> media exhibits an onset of nonlinear processes ...[more]