Optical excitations of a self assembled artificial ion

By use of magneto-photoluminescence spectroscopy we demonstrate bias controlled single-electron charging of a single quantum dot. Neutral, single, and double charged excitons are identified in the optical spectra. At high magnetic fields one Zeeman component of the single charged exciton is found to be quenched, which is attributed to the competing effects of tunneling and spin-flip processes. Our experimental data are in good agreement with theoretical model calculations for situations where the spatial extent of the hole wave functions is smaller as compared to the electron wave functions.Comment: to be published in Physical Review B (rapid communication

Parents Home Learning Strategies During the COVID-19 Pandemic Using Colaizzi Method

Numerous Filipino families grapple with challenges due to home learning amid the pandemic. This study delved into parents' experiences and strategies regarding their children's secondary education at home. Utilizing Colaizzi’s descriptive design, data was gathered through interviews. Eight parents from Tambulig, Zamboanga del Sur, with children in secondary home learning and no household COVID-related health issues, participated. Results revealed that while prioritizing their children's education, parents faced daunting challenges, leading them to opt for home learning. Balancing educational needs, work, and household duties posed significant hurdles. Concerns arose regarding distractions in modular and online setups, such as noise and peer influence. Despite these obstacles, parents remained committed to supporting and fostering a conducive learning environment at home, adhering to government safety measures