1. Boston University MRI – Development of a Holographic Nanoscale Optics Facility Development of a Holographic Nanoscale Optical Facility  Sub-20nm optical resolution with both amplitude and phase to holographically map 3D electric field distribution in the near-field  Wide wavelength range; Operates in reflection and transmission, includes elastic scattering, Raman and flourescence  Research on nano-plasmonics and nano- biosystems for sensing and detection 1 Bennett B. Goldberg, Trustees of Boston University, DMR 1429437

2. Boston University MRI – Development of a Holographic Nanoscale Optics Facility NSOM Studies of Aluminum Nanoantennas Progress: Develop & study Al nanoantennas via MRI funded NSOM system (under development). Advantages of Aluminum plasmonics Promising for UV & Vis nanoantennas – higher plasma freq. vs. Au, Ag, Cu CMOS process friendly material. Reduced cost. Bennett B. Goldberg, Trustees of Boston University, DMR 1429437 Simulated Near-Fields (Intensity & E-z component) |E| 2 |Ez| NSOM Probes This Nanoantenna test samples fabricated at BU

3. Boston University MRI – Development of a Holographic Nanoscale Optics Facility NSOM Modeling Tools, Contrast Improvement & Polarization Selectivity Object Near-FieldsSimulated NSOM Measurements Crossed polarizerNo polarizer Background overwhelms tip signal NSOM signal depends on complex interaction (coupling) between NSOM tip & sample. Also influenced by illumination focal fields. Developed tools combining semi-analytical methods with numerical (FDTD) tools to model NSOM signal. Enables accurate prediction & design of experiments, interpretation of data. Proposed methods using polarization to improve NSOM contrast & extract specific near-field components. Validated w/ modeling (experiment in progress). (Below). Bennett B. Goldberg, Trustees of Boston University, DMR 1429437