Effects of Quantum well Size Alteration on Excitonic Population Oscillation Slow Light Devices Properties

Slow light using excitonic population oscillation

We develop a theoretical model for slow light using excitonic population oscillation in a semiconductor quantum well. In a two-level system, if the resonant pump and the signal have a difference frequency within the range of inverse of the carrier lifetime, coherent population beating at this frequency will be generated. We analyze the excitonic population oscillation using an atomiclike model ...

Room temperature slow light in a quantum-well waveguide via coherent population oscillation.

We report room temperature demonstration of slow light propagation via coherent population oscillation (CPO) in a GaAs quantum well waveguide. Measurements of the group delay of an amplitude modulated signal resonant with the heavy-hole exciton transition reveal delays as long as 830 ps. The measured bandwidth, which approaches 100 MHz, is related to the lifetime of the photoexcited electron-ho...

Electronic and excitonic processes in light-emitting devices based on organic materials and colloidal quantum dots

We investigate the mechanism of operation of hybrid organic/colloidal quantum dot light emitting devices QD-LEDs . Novel quantum dot QD deposition methods allow us to change the location of an emissive QD monolayer within a QD-LED multilayer structure. We find that the quantum efficiency of devices improves by 50% upon imbedding QD monolayers into the hole transporting layer 10 nm away from the...

Control of light polarization by voltage in excitonic metasurface devices

S.V. Lobanov, 2 N.A. Gippius, S.G. Tikhodeev, 4 and L.V. Butov School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA, United Kingdom Skolkovo Institute of Science and Technology, Moscow 143026, Russia A. M. Prokhorov General Physics Institute, Russian Academy of Sciences, Vavilova Street 38, Moscow 119991, Russia M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow ...

Propagation properties of light in AlGaN/GaN quantum-well waveguides