On Tuesday, August 5th the UR SPIE student chapter will be continuing its Summer Colloquium series with a double header! Please bring your lunch and come listen to our next presentation! Snacks and beverages will be provided.
Speaker 1: Laura Kinnischtzke
What: Interfacing Matter and Light: An Overview of Quantum Dot Spectroscopy
Abstract: Three dimensional confinement of electrons is realized in self-assembled quantum dots, and they are strong candidates for charge qubits due to the relative ease with which a single electron’s spin can be manipulated, as well as their strong optical response in the near IR. Although each dot has a discrete spectral emission profile, the optical properties (e.g. resonance position and linewidth) vary from dot to dot. This drawback is overcome with a series of both resonant and non-resonant spectroscopic measurements using a cryogenic confocal microscope. Applying static electric and magnetic fields allows the energy landscape of the dot to be fully explored. Future experiments include optical detection of electron spin resonance in a quantum dot, which can provide clues to how a quantum dot couples to the effective magnetic field created by the nuclei of host atoms.
Speaker 2: Kenny Goodfellow
What: Integrated nanophotonics based on nanowire plasmons and atomically-thin material
Abstract:The continually increasing demands for higher speed and lower operating power devices have
resulted in the continued impetus to shrink photonic and electronic components. Atomically-thin materials, such as monolayer molybdenum disulfide (MoS2), have gained attention in this realm. Monolayer MoS2 exhibits a direct band gap, displays large photoluminescence, and has shown promise in transistors, photodetectors, and LEDs. I will demonstrate a primitive nanophotonic integrated circuit element composed of a single silver nanowire and single-layer MoS2 flake. I show that nanowire plasmons can excite MoS2 photoluminescence and that MoS2 excitons can decay into nanowire plasmons. I also show that the nanowire may serve the dual purpose of both exciting MoS2 photoluminescence via plasmons and recollecting the decaying exciton as nanowire plasmons.
What: Interfacing Matter and Light: An Overview of Quantum Dot Spectroscopy
Abstract: Three dimensional confinement of electrons is realized in self-assembled quantum dots, and they are strong candidates for charge qubits due to the relative ease with which a single electron’s spin can be manipulated, as well as their strong optical response in the near IR. Although each dot has a discrete spectral emission profile, the optical properties (e.g. resonance position and linewidth) vary from dot to dot. This drawback is overcome with a series of both resonant and non-resonant spectroscopic measurements using a cryogenic confocal microscope. Applying static electric and magnetic fields allows the energy landscape of the dot to be fully explored. Future experiments include optical detection of electron spin resonance in a quantum dot, which can provide clues to how a quantum dot couples to the effective magnetic field created by the nuclei of host atoms.
Speaker 2: Kenny GoodfellowWhat: Integrated nanophotonics based on nanowire plasmons and atomically-thin material
Abstract:The continually increasing demands for higher speed and lower operating power devices have
resulted in the continued impetus to shrink photonic and electronic components. Atomically-thin materials, such as monolayer molybdenum disulfide (MoS2), have gained attention in this realm. Monolayer MoS2 exhibits a direct band gap, displays large photoluminescence, and has shown promise in transistors, photodetectors, and LEDs. I will demonstrate a primitive nanophotonic integrated circuit element composed of a single silver nanowire and single-layer MoS2 flake. I show that nanowire plasmons can excite MoS2 photoluminescence and that MoS2 excitons can decay into nanowire plasmons. I also show that the nanowire may serve the dual purpose of both exciting MoS2 photoluminescence via plasmons and recollecting the decaying exciton as nanowire plasmons.
When: 8/5/2014 11:30 am – 12:30 pm
Where: Sloan Auditorium (Goergen 101)
