Emergence of Constructor-based Irreversibility in Quantum Systems: Theory and Experiment
(2020)
Coarse and fine-tuning of lasing transverse electromagnetic modes in coupled all-inorganic perovskite quantum dots
Nano Research Springer Science and Business Media LLC (2020)
Abstract:
<jats:title>Abstract</jats:title> <jats:p>Inorganic perovskite lasers are of particular interest, with much recent work focusing on Fabry-Pérot cavity-forming nanowires. We demonstrate the direct observation of lasing from transverse electromagnetic (TEM) modes with a long coherence time ∼ 9.5 ps in coupled CsPbBr<jats:sub>3</jats:sub> quantum dots, which dispense with an external cavity resonator and show how the wavelength of the modes can be controlled via two independent tuning-mechanisms. Controlling the pump power allowed us to fine-tune the TEM mode structure to the emission wavelength, thus providing a degree of control over the properties of the lasing signal. The temperature-tuning provided an additional degree of control over the wavelength of the lasing peak, importantly, maintained a constant full width at half maximum (FWHM) over the entire tuning range without mode-hopping.</jats:p>Transforming pure and mixed states using an NMR quantum homogeniser
(2020)
Quantum Refrigeration with Indefinite Causal Order
Physical Review Letters American Physical Society (APS) 125:7 (2020) 070603