20th Annual Student Research Conference
Science
Measurement and Analysis of the Power Distribution in Diffraction Gratings as a Function of Incident Angle and Wavelength
Violet M. Poole* and Raghav Chhetri,
Dr. Michael Goggin, Faculty Mentor
Under certain conditions, a significant fraction of the light diffracted from a diffraction grating is absorbed by the grating. Existing experimental results and theory indicate there are two main reasons for power loss in diffraction gratings: (1) emergence or disappearance of a spectral order and (2) the coupling of the incident light wave with electrons at the surface of the grating in a resonance type phenomenon. We studied the overall efficiency (the ratio of the total diffracted power in all orders over the total incident power) for diffraction gratings at various incident angles and wavelengths. Comparisons to theory are also made.
Keywords: diffraction gratings, optics, efficiency, Surface Plasmons, Wood's Anomolies, physics
Topic(s):Physics
Presentation Type: Oral Paper
Session: 13-2
Location: VH 1416
Time: 8:30 am