A Mach-Zehnder interferometer for the measurement of the complex permittivity of lossy dielectrics at submillimetre wavelengths

Study of the structure and refractive parameters of diethylamine and triethylamine

“…In comparison with the electrical methods which measure the physical constants at low frequencies, this technique is useful and valuable in the high optical frequencies [16,17]. Using the present technique we intend to measure the physical constants of different non-magnetic solutions.…”

Molecular properties of hexane

“…Since the permittivity and refractive index are frequency dependent, if the experimentally determined values of n as a function of frequency in the visible range of spectrum are extrapolated to in®nite wavelength, the square of the refractive index so obtained will be equal to the contribution to the static permittivity arising solely from electronic polarization [15]. The permittivities of di erent materials were determined using di erent methods [16,17]. In the present work, we apply Maxwell's relationship ("ˆn 2 ) to calculate the optical permittivities as a function of wavelength and temperature.…”

Complex Index of Refraction Measurements at Near-Millimeter Wavelengths

“…The phase shift is readily obtainable as a variable optical path length [ 13] or as a variable sample thickness in the case of liquids [14]. The signalto-noise ratio is generally very good.…”