APRIL 1999 REPORT FOR

W. CHARLES SYMONS, III

During April the more near-IR NSOM data was collected. The first real specimen imaged was 300nm diameter beads at a source wavelength of 1760nm as seen in the Figure 1 below. Furthermore, using the EOSI tunable source, a spectrum was taken of these beads and compared to the spectrum obtained in a traditional spectrometer. This data served to confirm the operation of the NSOM instrument.

In addition to completing experiments with the near-IR NSOM, the X-band NSOM instrument was constructed and preliminary data was collected. The preliminary data looked very promising and a complete experiment is almost complete. The basic results and setup of this experiment will be discussed in further detail in next month's report.

Figure 1: NSOM Image of 300nm Polystyrene Beads.

Figure 2: Near-IR Spectra of Polystyrene Beads.