Thermal Contrast in Nanoscale Infrared Spectroscopy (AFM-IR): Low Frequency Limit

Autor:	Morozovska, Anna N., Eliseev, Eugene A., Borodinov, N., Ovchinnikova, O., Morozovsky, Nicholas V., Kalinin, Sergei V.
Rok vydání:	2017
Předmět:	Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	The contrast formation mechanism in Nanoscale Infrared Spectroscopy (Nano-IR or AFM-IR) is analyzed for the boundary between two layers with different light absorption, thermal and elastic parameters. Analytical results derived in the decoupling approximation for low frequency limit show that the response amplitude is linearly proportional to the intensity of the illuminating light and thermal expansion coefficient. The spatial resolution between two dissimilar materials is linearly proportional to the sum of inverse light adsorption coefficients and to the effective thermal transfer length. The difference of displacements height across the T-shape boundary ("thermo-elastic step") is proportional to the difference of the adsorption coefficients and inversely proportional to the heat transfer coefficient. The step height becomes thickness-independent for thick films and proportional to h^2 in a very thin film Comment: 24 pages (including supplementary materials), 3 figues, 1 table
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1705.09341 Zobrazit plný text záznamu View this record from Arxiv