Spontaneous emission of electric and magnetic dipoles in the vicinity of thin and thick metal

Strong modification of spontaneous emission of Eu3+ ions placed in close vicinity to thin and thick gold and silver films was clearly demonstrated in a microscope setup separately for electric and magnetic dipole transitions. We have shown that the magnetic transition was very sensitive to the thickness of the gold substrate and behaved distinctly different from the electric transition. The observations were described theoretically based on the dyadic Green's function approach for layered media and explained through modified image models for the near and far-field emissions. We established that there exists a "near-field event horizon", which demarcates the distance from the metal at which the dipole emission is taken up exclusively in the near field.Comment: 11 pages, 7 figure

Modification of the Fundamental Properties of Light Through Interaction with Nanostructured Materials

The field of photonics has been growing rapidly over the last few decades as it has endeavored to harness the potential of nanostructured materials to utilize the energy and momentum of electromagnetic radiation on the nanoscale. Using metal nanostructures provides the ability to take advantage of the sub-field of plasmonics which holds the promise of opening the world to vast increases in computational power by circumventing the limitations of conventional current that plague today’s processors. With a thorough understanding of this subject we also get one step closer to increasing the efficiency of solar technology, developing a finer scale of sensing technology, and a new area of minute scale mechanical manipulation of materials. There is still much work to be done before we attain these lofty goals. As such, here we present another step in the never ending journey of exploration

Hyperbolic Resonances of Metasurface Cavities

We propose a new class of optical resonator structures featuring one or two metasurface reflectors or metacavities and predict that such resonators support novel hyperbolic resonances. As an example of such resonances we introduce hyperbolic Tamm plasmons (HTPs) and hyperbolic Fabry-Perot resonances (HFPs). The hyperbolic optical modes feature low-loss incident power re-distribution over TM and TE polarization output channels, clover-leaf anisotropic dispersion, and other unique properties which are tunable and are useful for multiple applications.Comment: 20 pages, 10 figure

Regulating the Internet of Things: Protecting the Smart Home

The Internet of Things (IoT)—the internetworking of “smart” devices for the purpose of collecting and exchanging data—is developing rapidly. Estimates of the number of IoT devices currently in circulation range from 6.4 to 17.6 billion. By 2020, those numbers could reach upward of 30 billion. While the technology encourages innovation and promotes data-driven policymaking, it also compromises consumer privacy, security, and safety. Consumers are generally unaware that IoT devices transmit scores of personally-identifiable information with only rudimentary security protections in place. For some devices, inadequate security measures unnecessarily risk consumer safety by leaving the devices vulnerable to remote manipulation by third parties. ISSUE Whether IoT-connected devices found in a “smart” home should be regulated to ensure appropriate protections for consumers and their data. BRIEF ANSWER The IoT should be regulated but not yet. The industry is still in its infancy and the current political climate is too unstable. Over the next decade, the industry should be closely studied and regulation should be revisited once all of the main risks are assessed. Directed to the Washington State Office of Privacy and Data Security.https://digitalcommons.law.uw.edu/techclinic/1011/thumbnail.jp

Spontaneous Emission of Electric and Magnetic Dipoles in the Vicinity of Thin and Thick Metal

Strong modification of spontaneous emission of Eu3+ ions placed in close vicinity to thin and thick gold and silver films was clearly demonstrated in a microscope setup separately for electric and magnetic dipole transitions. We have shown that the magnetic transition was very sensitive to the thickness of the gold substrate and behaved distinctly different from the electric transition. The observations were described theoretically based on the dyadic Green’s function approach for layered media and explained through modified image models for the near and far-field emissions. We established that there exists a “near-field event horizon”, which demarcates the distance from the metal at which the dipole emission is taken up exclusively in the near field