dc.contributor.author |
Kharintsev S. |
|
dc.contributor.author |
Fishman A. |
|
dc.contributor.author |
Saikin S. |
|
dc.contributor.author |
Kazarian S. |
|
dc.date.accessioned |
2018-09-19T22:40:29Z |
|
dc.date.available |
2018-09-19T22:40:29Z |
|
dc.date.issued |
2016 |
|
dc.identifier.issn |
2040-3364 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/145352 |
|
dc.description.abstract |
© 2016 The Royal Society of Chemistry.Azobenzene-functionalized polymer films are functional materials, where the (planar vs. homeotropic) orientation of azo-dyes can be used for storing data. In order to characterize the nanoscale 3D orientation of the pigments in sub-10 nm thick polymer films we use two complementary techniques: polarization-controlled tip-enhanced Raman scattering (TERS) microscopy and contact scanning capacity microscopy. We demonstrate that the homeotropic and planar orientations of the azo-dyes are produced by applying a local dc electrical field and a resonant longitudinal optical near-field, respectively. For a non-destructive probe of the azo-dye orientation we apply a non-resonant optical near-field and compare the intensities of the Raman-active vibrational modes. We show that near-field Raman dichroism, a characteristic similar to the absorption dichroism used in far-field optics, can be a quantitative indicator of the 3D molecular orientation of the azo-dye at the nanoscale. This study directly benefits the further development of photochromic near-field optical memory that can lead to ultrahigh density information storage. |
|
dc.relation.ispartofseries |
Nanoscale |
|
dc.title |
Near-field Raman dichroism of azo-polymers exposed to nanoscale dc electrical and optical poling |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
47 |
|
dc.relation.ispartofseries-volume |
8 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
19867 |
|
dc.source.id |
SCOPUS20403364-2016-8-47-SID85000766265 |
|