Loading...
Search for:
zarif--a
0.005 seconds
Near field differential interference contrast microscopy
, Article Scientific Reports ; Volume 10, Issue 1 , 15 June , 2020 ; Yazdanfar, P ; Zarif, A ; Rashidian, B ; Sharif University of Technology
Nature Research
2020
Abstract
Near field scanning optical microscopy exploiting differential interference contrast enhancement is demonstrated. Beam splitting in the near field region is implemented using a dual color probe based on plasmonic color sorter idea. This provides the ability to illuminate two neighboring points on the sample simultaneously. It is shown that by modulating the two wavelengths employed in exciting such a probe, phase difference information can be retrieved through measuring the near field photoinduced force at the difference of the two modulation frequencies. This difference in frequency is engineered to correspond to the first resonant frequency of the cantilever, resulting in improved SNR, and...