Abstract
Ultrafast transmission changes around the fundamental trion resonance are studied after exciting a p-shell exciton in a negatively charged II-VI quantum dot. The biexcitonic induced absorption reveals quantum beats between hot-trion states at 133GHz. While interband dephasing is dominated by relaxation of the P-shell hole within 390fs, trionic coherence remains stored in the spin system for 85ps due to Pauli blocking of the triplet electron. The complex spectrotemporal evolution of transmission is explained analytically by solving the Maxwell-Liouville equations. Pump and probe polarizations provide full control over amplitude and phase of the quantum beats.
Highlights
Our experimental setup consists of a three-color femtosecond fiber source coupled to a polarizationsensitive transmission microscope operating at 1.6 K [19]
A quadratic increase of intensity with excitation power [21] assigns them to recombination of the charged biexciton ground state (|CBGS⟩) into trion triplet states |X⟩ and |Y⟩ [22] which are spectrally split by (550±5) μeV
High-resolution transmission electron microscopy (HRTEM)based composition mapping revealed that the ZnSe-capped CdSe quantum dot (QD) are essentially undulations in a compositionally inhomogeneous quasi-2D CdZnSe layer with Cd-rich cores
Summary
Principles of Nonlinear Optical Spectroscopy (Oxford University Press, 1995).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
