Characterization of thin polymer films using terahertz time-domain interferometry | Zendy

Satheesh Krishnamurthy | Zendy; Matthew T. Reiten | Zendy; S. A. Harmon | Zendy; Alan Cheville | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Open Access

Characterization of thin polymer films using terahertz time-domain interferometry

Author(s) -

Satheesh Krishnamurthy,

Matthew T. Reiten,

S. A. Harmon,

Alan Cheville

Publication year - 2001

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.1389823

Subject(s) - interferometry , optics , materials science , michelson interferometer , terahertz radiation , interference (communication) , refractive index , thin film , time domain , astronomical interferometer , terahertz spectroscopy and technology , characterization (materials science) , laser , optoelectronics , physics , telecommunications , channel (broadcasting) , nanotechnology , computer science , computer vision

An interferometer for broadband single-cycle THz pulses is developed based on the Michelson configuration. Total internal reflection of THz pulses in high-resistivity silicon prisms provides a nearly 180° phase shift of one arm relative to the other to achieve destructive interference. We show that due to automatic compensation for laser fluctuations by the interferometer, it is possible to measure the index and absorption of thin-film samples with more accuracy than is achievable with standard THz time-domain spectroscopy. We demonstrate characterization of the complex index of refraction of 2 μm thick Mylar (polyester) films. By measuring the signal amplitude directly in the time domain, the interferometer can be used for rapid measurements of film thickness with a resolution of better than 1 μm.

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research