Abstract
Phase stepping interferometry is used to measure the size of near-cylindrical nanowires. Nanowires with nominal radii of 25 nm and 50 nm were used to test this by comparing specific measured optical phase profile values with theoretical values calculated using a wave-optic model of the Phase stepping interferometry (PSI) system. Agreement within 10% was found, which enabled nanowire radii to be predicted within 4% of the nominal value. This demonstration highlights the potential capability for phase stepping interferometry to characterize single nanoparticles of known geometry in the optical far-field.
| Original language | English |
|---|---|
| Article number | 161107 |
| Journal | Applied Physics Letters |
| Volume | 103 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 14 Oct 2013 |