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Objectives

Objectives. Compare calculated Q with experimental Q for PMMA coated toroidal devices. In these experiments, I varied the: Wavelength (850nm, 980nm) Film thickness (0-100nm) I kept the input power very low, toroid geometry consistent . H-S. Choi, 10/2009. Objective 1: 850nm measurements.

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Objectives

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  1. Objectives • Compare calculated Q with experimental Q for PMMA coated toroidal devices. In these experiments, I varied the: • Wavelength (850nm, 980nm) • Film thickness (0-100nm) • I kept the input power very low, toroid geometry consistent H-S. Choi, 10/2009

  2. Objective 1: 850nm measurements Increasing film thickness 0 nm 20nm 50nm Decreasing Q factor H-S. Choi, 10/2009

  3. Objective 2: 980nm measurements Increasing film thickness 0 nm 20nm 50nm 100nm Decreasing Q factor H-S. Choi, 10/2009

  4. Objective 3: Comparison of theory and experiment Q theory The experimental Q always seems to be nearly same amount below the theory Q – maybe surface roughness? Q theory H-S. Choi, 10/2009

  5. Next Month • Finish testing PMMA (100nm at 850nm) • Maybe try retesting to reach theory Q? • Look at PS as well, using same experimental parameters (film thickness, wavelength, toroid size, input power) H-S. Choi, 10/2009

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