Alexandra Boltasseva, Assistant Professor

Collaborations

Photonics & Spectroscopy Lab, School of Electrical and Computer Engineering, Purdue University

Research group of Professor Vladimir Shalaev focuses on new classes of nanostructured metal-dielectric composites and their applications in nanophotonics, opto-electronics and spectroscopy. Such composites act like optical nanoantennas accumulating light in small, nanometer-scale areas, which results in high local light fields and thus in dramatic enhancement of optical responses. Excellent fabrication and characterization facilities (Birck Nanotechnology Center) allow manufacturing and testing of advanced nano-structures (such as periodic arrays of nanoparticles, nano-structured metal films and nano-wire meshes) for use as effective devices for applications in nanophotonics.

Our collaboration is within a Multidisciplinary University Research Initiative (MURI) Project "Tunable and Re-configurable Optical Negative-Index Materials with Low Losses".

DANCHIP, DTU

The use of new and unique processing facilities at DANCHIP, including new Electron-beam lithography system, opens up a possibility of fabricating different nano-scale structures for SPP-related research ranging from nano-wires embedded in polymer to complicated photonic crystals made as a corrugation of a metal surface.

Institute of Sensors, Signals and Electrotechnics, University of Southern Denmark

Research group of Professor Sergey Bozhevolnyi at the Institute of Sensors, Signals and Electrotechnics, University of Southern Denmark (SDU), has the broadest expertise in Denmark in near-field optical microscopy and research field that can be termed as nano-optics. The most significant scientific results are obtained in SPP-related research including investigations of multiple (resonance) light scattering by nanostructures, localization phenomena in SPP scattering, second-harmonic far- and near-field imaging, SPP band gap structures and near-field characterization of photonic crystal waveguides as well as theoretical modeling of SPPs' propagation along nanostructured surfaces.

Science Institute, University of Iceland

Dr. Kristjan Leosson has a broad experience in cleanroom processing and advanced nano-fabrication. He has worked as a project manager and process development engineer at companies Micro Managed Photons A/S and Lumiscence A/S in Denmark and is presently employed as a senior research scientist at the University of Iceland, focusing on fabrication of micro- and nanoscopic structures and devices.

DTU Nanotech

Research group of Associate Professor Anders Kristensen does research on polymer based micro- and nanostructures for lab-on-a-chip applications. Their activities cover both polymer nanofabrication techniques - electron beam lithography and nanoimprinting, and specific device applications - solid state and microfluidic dye lasers, II-VI nanocrystal based light sources, sub-wavelength optical elements, nano-fluidics, and bio-separation devices.

University of Texas:

Title: Quarter Waveplate metasurfaces with transparent conductive oxide
Collaborating Professor: Dr. Andrea Alu
Purdue Researcher: Jongbum Kim
Short Description: Fabrication of ultrathin quarter-waveplate metasurface by exploiting the field localization due to light interaction with surface plasmons.

Data Storage Institute, Singapore:

Title: Laser fabrication of TCO nanoparticle arrays by laser ablation on patterned TCO thin films
Collaborating Professor: Dr. Arseniy Kuznetsov
Purdue Researcher: Jongbum Kim
Short Description: Formation of TCO nanoparticle by laser fabrication to make localized surface plasmon resonance (LSPR) structures in NIR.

Northeastern University:

Title: Multi-layer nanodisk array of TCO to engineer the plasma frequency
Collaborating Professor: Dr. Hossein Mosallaei
Purdue Researcher: Jongbum Kim
Short Description: Fabrication of multi-layered nanodisk array to engineer the plasma frequency depending on the ratio of TCO and dielectric materials.

University of Pennsylvania:

Title: Self-assembly of nanostructures of alternative plasmonic materials
Collaborating Professor: Chris Murray
Purdue Researcher: Guru Naik
Short Description: Many materials other than gold and silver exhibit plasmonic properties in the visible and near-infrared. Transparent conducting oxides (TCOs) and metal nitrides are such materials which exhibit good plasmonic properties in this spectral range. Large synthesis of nanostructures of these materials is important for plasmonic applications in medicine, chemical sensing and local heating. Self-assembly is a cheap method of producing large arrays of nanostructures with precise control on the dimensions of the array. Hence, self-assembly of plasmonic nanostructures would be explored in this project.

University of Pennsylvania:

Title: Epsilon-near-zero applications of transparent conducting oxides
Collaborating Professor: Nader Engheta
Purdue Researcher: Guru Naik
Short Description: Transparent conducting oxides (TCOs) are materials that exhibit plasmonic properties in the near-infrared and dielectric properties in the visible. At some frequency in the near-infrared, TCOs change from being dielectric to metallic. This frequency is called plasma wavelength. Near the plasma frequency, the permittivity of TCOs is small and hence, behave as epsilon-near-zero (ENZ) materials. ENZ materials are know to exhibit unique properties such as producing sharp optical beams and isolating on-chip nanophotonic components from cross-talks. This project aims at exploring applications based on ENZ properties of TCOs to produce nanophotonic devices.

University of Michigan:

Title: Alternative plasmonic materials: Transmission-electron-microscopy studies on the plasmonic properties
Collaborating Professor: Ted Norris
Purdue Researchers: Guru Naik, Urcan Guler
Short Description: TEM can be used to map electric field distribution in plasmonic nanostructures. In this project, TEM studies will be performed on nanostructures of TCOs and metal nitride films.

Technical University of Denmark:

Title: THz plasmonic applications of TCOs
Collaborating Professors: Andrei Lavrinenko, Peter Uhd Jepsen, Radu Malureanu
Purdue Researcher: Guru Naik
Short Description: THz characterization of films of TCOs in order to understand the effects of doping, grain size and crystal defects on the optical properties.

Norfolk State University:

Title: Investigation of the nonlinear properties of alternative plasmonic materials
Collaborating Professors: Dr. Carl Bonner, and Dr. Mikhail Noginov
Purdue Researcher: Nate Kinsey
Short Description:An investigation into the third order nonlinear processes of titanium nitride, an important alternative plasmonic material.

University of Southern Denmark:

Title: Long Range Plasmonic Waveguides using Alternative plasmonic materials
Collaborating Professor: Dr. Sergey Bozhevolnyi
Purdue Researchers: Nate Kinsey and Guru Naik
Short Description: The fabrication, testing, and optimization of TiN based plasmonic waveguides which provide superior modal confinement as well as propagation length.