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New method to fabricate ZnS optical waveguides using thermoelectric devices

Salleh, Saafie, Dalimin, M.N., Chik, Abdullah and Rutt, H. (2003) New method to fabricate ZnS optical waveguides using thermoelectric devices At 20th Regional Conference on Solid State Science & Technology. 12 - 14 Dec 2003.

Record type: Conference or Workshop Item (Paper)


This work describes a new method to fabricate ZnS thin films using the thermal evaporation technique with a low substrate temperature. This work also was undertaken to establish that cold substrate evaporation using thermo electric coolers could be utilised to produce ZnS waveguides. A thermoelectric device which could be used to both heat and cool the substrates was designed and employed to deposit ZnS thin films on polished glass and silicon wafers. The heating and cooling were important factors to ensure that the ZnS films deposited on cold substrates show low loss waveguide characteristics. Optimizing this polycrystalline waveguide fabrication was a considerable challenge compared to the established, conventional waveguide fabrication. Propagation mode and power loss measurement were done by a commercial prism coupling method which is fitted with He-Ne laser and diode lasers. The transverse electric mode (TE) and loss decrease when the wavelength is increased. These observations agree well with a Rayleigh scattering model of the loss mechanism. The lowest loss of polycrystalline ZnS waveguide is 2.23 dB/cm measured a wavelength of 1540 nm.

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Published date: 2003
Venue - Dates: 20th Regional Conference on Solid State Science & Technology, 2003-12-12 - 2003-12-14


Local EPrints ID: 41555
PURE UUID: 5c3031b4-250d-4571-9e24-cc007a7f0ec3

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Date deposited: 02 Oct 2006
Last modified: 17 Jul 2017 15:29

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Author: Saafie Salleh
Author: M.N. Dalimin
Author: Abdullah Chik
Author: H. Rutt

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