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Showing 1 to 8 of 8 for “"Trion"”.
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Environmental coupling in a quantum dot as a resource for quantum optics and spin control
… emission spectra of the negatively charged trion transition. In the low power regime of resonance fluorescence, the excited state is not populated and most of the emission is coherent. In addition to elastic Rayleigh scattering, we observe coherent Raman sidebands, linked to an effective …
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Application of quantum Monte Carlo methods to homogeneous electron and electron-hole systems
… functions and momentum densities are reported. Trion formation is observed over a range of carrier densities and electron-hole mass ratios in agreement with experiment. Isolated trions are also studied, where the diffusion Monte Carlo method is exact. Methodological innovations developed while …
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The application of GHz bandwidth electrical pulses to a single semiconductor quantum dot.
… exciton results in the creation of a negative trion in a specific voltage regime. Photolithography and electron-beam evaporation were used to manufacture several micron-scale opto-electronic devices. Several changes were made with the intention of reducing the resistance and capacitance of the …
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Interfaces between two-dimensional transition metal dichalcogenide semiconductors and oxide dielectrics for transistors
… ZrO₂. PL spectra of MoS₂ on SiO₂ and HfO₂ show trion-dominant peaks from electron doping, while MoS₂ on ZrO₂ shows an exciton-dominant peak due to the absence of electron doping from oxide. The key discovery of this doctoral research is that the interface between ZrO₂ and MoS₂ is ultra-clean and …
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Seeing the invisible : single molecule microscopy in the shortwave infrared
… grey-state emission - commonly attributed to trion recombination - with a PL lifetime nearly equal to the bright state (attributed to neutral exciton recombination). For the 21 NCs studied, we observe signicant heterogeneity in single-NC radiative lifetimes (47 to 179 ns), while simultaneously …
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Light-matter interactions of two-dimensional materials and the coupled nanostructures
… strongly affect their PL emissions, exciton and trion properties. Moreover, combining Raman spectroscopy and X-ray photoelectron spectroscopy, the effects of substrates and defects for MoS₂ have been revealed. Next, interlayer vibrational properties of 2D materials are studied utilizing …
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Strong-field Phenomena in Low-dimensional Materials at Terahertz Frequencies
… in QDs on gold by suppressing the trion-mediated Auger recombination. By effectively engineering the charge transfer between luminophore systems, we have developed a record-sensitive THz detector and polarimeter via THz-to-visible upconversion. We have investigated crossover between …
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Photon Sources for Linear Optical Quantum Computing
… from the resonant excitation of the negative trion transition. Repeating the measurement using light generated from a similar system (this time with a trapped hole rather than a trapped electron) that is embedded in a micropillar cavity, we find that the cavity enhancement of the transition …