We present recent progress on the development of nano-opto-electromechanical systems (NOEMS) for solid-state quantum photonics and discuss the application of optical switching networks for ...de-multiplexing single photons generated by semiconductor quantum dots.
Large quantum dots with small oscillator strength Stobbe, S.; Schlereth, T. W.; Höfling, S. ...
Physical review. B, Condensed matter and materials physics,
12/2010, Letnik:
82, Številka:
23
Journal Article
Direct Observation of Hypersonic Guided Modes Florez, O.; Arregui, G.; Albrechtsen, M. ...
2022 Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR),
2022-July-31
Conference Proceeding
We measure two GHz guided modes in a line defect waveguide fabricated in silicon on insulator (SOI), using Brillouin light scattering spectroscopy.
This volume of "Research in Social Movements, Conflicts, and Change" investigates gendered aspects of social activism and peacebuilding, an area of research that continues to be undertheorized. ...Gender cuts across all forms of conflict and all aspects of society politically, economically, and socially. As a basic organizing principle in society, gender roles, relations, and inequalities impact social processes. From a gender perspective, the transformation of society requires investigating the overlapping and intertwined root causes of conflict from the interpersonal to the community and structural level, and the critical role that women play in conflict resolution, peacebuilding, and social movements. With a focus on the agency of grassroots citizens, refugee, indigenous, and ethnic minority women, this volume seeks to bring light to gendered aspects of practice that will assist scholars and practitioners in research and policy development. From reconciliation commissions in Sierra Leone, environmental activists in the Czech Republic, women's organizations in Burmese refugee camps, women's work in conflict resolution rituals in Laos, Minutewomen's e-activism in the United States, to women's social networks in Uzbekistan, this book explores complex contexts and critical issues central to women's grassroots activism, peacebuilding, and social movements.
We measure a full mechanic gap in the GHz regime for a 2D phononic crystal over the entire Brillouin zone using the noninvasive Brillouin light scattering technique.
We have measured the variation of the spontaneous emission rate with polarization for self-assembled single quantum dots in two-dimensional photonic crystal membranes, and obtained a maximum ...anisotropy factor of 6 between the decay rates of the two nondegenerate bright states.
Controlling the vibrations in solids is crucial to tailor their mechanical properties and their interaction with light. Thermal vibrations represent a source of noise and dephasing for many physical ...processes at the quantum level. One strategy to avoid these vibrations is to structure a solid such that it possesses a phononic stop band, i.e., a frequency range over which there are no available mechanical modes. Here, we demonstrate the complete absence of mechanical vibrations at room temperature over a broad spectral window, with a 5.3 GHz wide band gap centered at 8.4 GHz in a patterned silicon nanostructure membrane measured using Brillouin light scattering spectroscopy. By constructing a line-defect waveguide, we directly measure GHz localized modes at room temperature. Our experimental results of thermally excited guided mechanical modes at GHz frequencies provides an eficient platform for photon-phonon integration with applications in optomechanics and signal processing transduction.
The objective of this study is to improve heating value and methane content of gas produced from biomass gasification. This project investigates a latent-heat ballasted, indirectly-heated gasifier. ...The latent-heat ballast consists of metal alloy with melting point close to the desired gasification temperature. The ballast allows a single reactor to sustain pyrolysis without oxygen addition by storing energy during periods of combustion and releasing stored energy during periods of pyrolysis. Tests were performed to evaluate the heat transfer and gasification characteristics of the ballasted reactor.
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