Development of new techniques for submillimetre wave spectroscopy of solids

Mok, Che Loi


Mok, Che Loi (1981) Development of new techniques for submillimetre wave spectroscopy of solids.

Our Full Text Deposits

Full text access: Open

10107334.pdf - 4.19 MB


A selection of free-standing fine-wire grids with different wire spacings have been wound for use as spectroscopic components at millimetre and submillimetre wavelengths. The performance of the grids has been investigated extensively and found to be in good overall agreement, both qualitatively and quantitatively, with calculations made using a least-squares method developed by Beunen. Where discrepancies occur they are attributed to the effect of uneven spacing of the wires. A microcomputing system based on the Z80 8-bit microprocessor has been built to provide data acquisition and Fourier transformation for a Fourier spectrometer. Measurements have been made of the far infrared optical constants of KC1 and KBr crystals by dispersive Fourier transform spectroscopy at temperatures in the range 7-500K using instruments equipped with both mylar and wire grid beam dividers. The results have been used to calculate the dielectric functions and the an harmonic self energy functions of the q = 0 transverse optic modes in these crystals. The frequencies of the transversive optic (TO) and longitudinal optic (LO) modes determined from the dielectric functions are in good agreement with the accepted values, and in the case of KBr, the frequency-dependence of the an harmonic self-energy functions determined at room temperature is in good agreement with calculations made by Bruce.

Information about this Version

This is a Accepted version
This version's date is: 1981
This item is not peer reviewed

Link to this Version

Item TypeThesis (Doctoral)
TitleDevelopment of new techniques for submillimetre wave spectroscopy of solids
AuthorsMok, Che Loi
Uncontrolled KeywordsCondensed Matter Physics; Pure Sciences; Development; New; Solids; Spectroscopy; Submillimetre; Submillimetre Wave Spectroscopy; Submillimetre Wave Spectroscopy; Techniques; Wave



Deposited by () on 31-Jan-2017 in Royal Holloway Research Online.Last modified on 31-Jan-2017


Digitised in partnership with ProQuest, 2015-2016. Institution: University of London, Royal Holloway and Bedford New College (United Kingdom).