Kavli Affiliate: Kobus Kuipers | First 5 Authors: Ewold Verhagen, René de Waele, L., Kuipers, Albert Polman | Summary: We identify a route towards achieving a negative index of refraction at optical frequencies based on coupling between plasmonic waveguides that support backwards waves. We show how modal symmetry can be exploited in metal-dielectric waveguide pairs […]
Kavli Affiliate: Laurens Kuipers | First 5 Authors: Matteo Burresi, Tobias Kampfrath, Dries van Oosten, Jord C. Prangsma, Bong-Shik Song | Summary: The ability to actively tune the properties of a nanocavity is crucial for future applications in photonics and quantum information. Two important man-made classes of materials have emerged to mold the flow of […]
Kavli Affiliate: Jos W. Zwanikken | First 5 Authors: Chantal Valeriani, Philip J. Camp, Jos W. Zwanikken, René van Roij, Marjolein Dijkstra | Summary: The problem of successfully simulating ionic fluids at low temperature and low density states is well known in the simulation literature: using conventional methods, the system is not able to equilibrate […]
Kavli Affiliate: Chiara Daraio | First 5 Authors: Alessandro Spadoni, Chiara Daraio, , , | Summary: Acoustic lenses are employed in a variety of applications, from biomedical imaging and surgery, to defense systems, but their performance is limited by their linear operational envelope and complexity. Here we show a dramatic focusing effect and the generation […]
Kavli Affiliate: Andrei Faraon | First 5 Authors: Andrei Faraon, Arka Majumdar, Jelena Vuckovic, , | Summary: The generation of non-classical states of light via photon blockade with time-modulated input is analyzed. We show that improved single photon statistics can be obtained by adequately choosing the parameters of the driving laser pulses. An alternative method, […]
Kavli Affiliate: Jos Zwanikken | First 5 Authors: Jos Zwanikken, René van Roij, , , | Summary: Within a modified Poisson-Boltzmann theory we study the effect of Bjerrum pairs on the typical length scale $1/bar{kappa}$ over which electric fields are screened in electrolyte solutions, taking into account a simple association-dissociation equilibrium between free ions and […]
Kavli Affiliate: Andrei Faraon | First 5 Authors: Andrei Faraon, Jelena Vuckovic, , , | Summary: We demonstrate a method to locally control the temperature of photonic crystal devices via micron-scale electrical heaters. The method is used to control the resonant frequency of InAs quantum dots strongly coupled to GaAs photonic crystal resonators. This technique […]
Kavli Affiliate: David Weitz | First 5 Authors: David Issadore, Katherine J. Humphry, Keith A. Brown, Lori Sandberg, David Weitz | Summary: We present a technique to locally and rapidly heat water drops in microfluidic devices with microwave dielectric heating. Water absorbs microwave power more efficiently than polymers, glass, and oils due to its permanent […]
Kavli Affiliate: Jos Zwanikken | First 5 Authors: Jos Zwanikken, Joost de Graaf, Markus Bier, René van Roij, | Summary: We calculate ion distributions near a planar oil-water interface within non-linear Poisson-Boltzmann theory, taking into account the Born self-energy of the ions in the two media. For unequal self-energies of cations and anions, a spontaneous […]
Kavli Affiliate: Darrell Schlom | First 5 Authors: Amit Kumar, R. Rai, Nikolas Podraza, Sava Denev, Mariola Ramirez | Summary: Using spectroscopic ellipsometry, the refractive index and absorption versus wavelength of the ferroelectric antiferromagnet Bismuth Ferrite, BiFeO_3 is reported. The material has a direct band-gap at 442 nm wavelength (2.81 eV). Using optical second harmonic […]