Polymerisation-related changes in THz transmission in SU8 and polystyrene

Author

Naftaly, M. ; Dimitrakopoulos, D. ; Miles, R.E. ; Brown, S. ; Perrier, S.

Author_Institution

Univ. of Leeds, Leeds

fYear

2006

fDate

18-22 Sept. 2006

Firstpage

56

Lastpage

56

Abstract

THz TDS was used to study the effects of polymerisation on THz transmission in SU8 and polystyrene. SU8 samples, spun onto a THz-transparent polyethelene substrate, were cross-linked to varying degrees using different UV exposure times. Variations in THz absorption and refractive index were observed as a function of the exposure times. Polystyrene samples were prepared as monodispersed powders with varying molecular weights. Variations of the THz refractive index with molecular weight were observed and analysed using the Claussius-Mosotti equation for the dielectric constant.

Keywords

absorption coefficients; permittivity; polymerisation; polymers; powders; refractive index; submillimetre wave spectra; ultraviolet radiation effects; Claussius-Mosotti equation; SU8 samples; TDS; THz absorption; THz transmission; UV exposure times; curing; dielectric constant; epoxy resin; monodispersed powder preparation; negative photoresist; polymerisation-related changes; polystyrene; refractive index; time domain spectroscopy; transparent polyethelene substrate; Curing; Electromagnetic wave absorption; Equations; Frequency; Optical refraction; Optical scattering; Polymer films; Powders; Refractive index; Spectroscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on

Conference_Location

Shanghai

Print_ISBN

1-4244-0400-2

Electronic_ISBN

1-4244-0400-2

Type

conf

DOI

10.1109/ICIMW.2006.368265

Filename

4221999