GaN Nanowires: ee298-2

Seminar: Departmental | November 6 | 11 a.m.-12:30 p.m. | 521 Cory Hall

Speaker/Performer: Jeff Urban, LBL

Sponsor: Electrical Engineering and Computer Sciences (EECS)

The generation and control of directional white light is critical for many technological, spectroscopic, and imaging applications. On the millimeter or greater scale, it may be attained and manipulated via standard optical techniques, however, there currently exists no general method to generate and direct white light at nanoscale dimensions. Here we demonstrate broadband, directed, white-light generation by multi-photon excitation of sub-wavelength diameter Gallium Nitride (GaN) wires by simple continuous-wave (CW), sub- bandgap 532nm illumination. This talk will focus on the unique optical properties of these sub-wavelength nanowires, and how this unusual behavior contributes to the physical origin of this efficient white light generation. I will close by demonstrating the use of this nanoscale white light source for spectroscopic studies and discussing future prospects.

Event Contact: 510-643-5801