2D Semiconductor Nonlinear Plasmonic Modulators

A plasmonic modulator is a device that controls the amplitude or phase of propagating plasmons. In a pure plasmonic modulator, the presence or absence of a pump plasmonic wave controls the amplitude of a probe plasmonic wave through a channel. This control has to be mediated by an interaction between disparate plasmonic waves, typically requiring the integration of a nonlinear material. In this work, we demonstrate the first 2D semiconductor nonlinear plasmonic modulator based on a WSe2 monolayer integrated on top of a lithographically defined metallic waveguide. We utilize the strong coupling between the surface plasmon polaritons, SPPs, and excitons in the WSe2 to give a 73 percent change in transmission through the device. We demonstrate control of the propagating SPPs using both optical and SPP pumps, realizing the first demonstration of a 2D semiconductor nonlinear plasmonic modulator, with a modulation depth of 4.1 percent, and an ultralow switching energy estimated to be 40 aJ

CSSN Research Report 2021:2: The Mises Institute Network and Climate Policy. 9 Findings

Think tanks have played a decisive role in the organised obstruction of climate action, denying, minimising, or derailing ambitious climate change mitigation. This research briefing reviews the case of the Ludwig von Mises Institutes and the Property and Freedom Society, a network of ultra-libertarian groups active around the world, which we refer to as the Mises Institute Network in the mobilisation and the dissemination of climate policy opposition discourse. We review the origins, the history, the global distribution and the climate-related output of 31 Mises Institutes between 2000 and 2021. Our analysis reveals climate obstruction messaging based on a critique of climate science, principled objections to state intervention and planning and the social forces supporting climate change mitigation, as well as advocacy of free-market environmentalism as a suitable alternative to established climate politics. While Mises social theory includes a determined critique of environmentalism, it paid limited attention to climate change before 2016. From 2016, there has been a concerted effort to disseminate climate opposition discourse featuring a clear spike in published articles during 2019. Contextually, 2019 saw the U.S. Green New Deal proposal and the European Union Green Deal decision suggesting a tipping point for advocating free-market environmentalism in response to climate change to contend the increased state intervention discourse emerging in domestic and international climate policy planning. Additionally, ties exist between scholars of Mises Institutes to a broad range of business groups ranging from gold, trade and investment firms in Germany, tobacco companies in the U.S., business school, consulting and service firms in Spain, and metal employer association and financial groups in Sweden. Furthermore, the network is engaging in an international effort to recruit new members into the ultra-libertarian movement, with an active university presence and active online campaign to spread Mises’ philosophy and recruit more members, particularly students and young people, to the movement. Despite the lack of transparency and limited evidence of fossil industry funding, the Mises Network of think tanks has a clear voice in the denial and delaying think tank train, gaining speed at this pivotal moment in time. Our results indicate a dedicated effort to spread climate change opposition messages across the network. The core ideology of the Austrian economics tradition related to Ludwig von Mises provides the climate change opposition with a straightforward repertoire of arguments. Put simply, the coordinated activities of Mises Institutes across countries illustrates an attempt to circulate widely opposition to climate policy based on the radicalism of Mises social theory that focuses on resistance to government intervention and a form of market fundamentalism as a primer to maintain business as usual at the behest of the planet

CSSN Research Report 2021:2: The Mises Network and Climate Policy

Think tanks have played a decisive role in the organised obstruction of climate action, denying,minimising, or derailing ambitious climate change mitigation. This research briefing reviews the caseof the Ludwig von Mises Institutes and the Property and Freedom Society, a network ofultra-libertarian groups active around the world, which we refer to as the Mises Institute Network inthe mobilisation and the dissemination of climate policy opposition discourse. We review the origins,the history, the global distribution and the climate-related output of 31 Mises Institutes between 2000and 2021