32
2 Terahertz Time-Domain Spectroscopy
the value of δ will alter the polarisation sensitivity of the detecton system. If θ = 0,
having δ = 0 will result in detection of the E 011 component of the THz pulse only,
whilst rotating the HWP by 22.5
◦ will therefore allow detection of the orthogonal
E 211 component only. Detection of both components allows the resolution of the full
THz polarisation state, by considering the two detected waveforms as the projections
of the THz pulse onto the lab x- and y-planes.
2.3 THz-TDS Experimental Setup
This section will describe the constituent parts and operation of the THz time-domain
spectrometer used throughout the majority of experimental work presented in this
thesis. This spectrometer was designed and constructed by myself as a part of this
doctoral research project.
A schematic diagram of the spectrometer is presented in Fig. 2.4. The output of a
Ti:Sapphire oscillator (Spectra-Physics Mai Tai) is split into two beams by a 90%transmission beamsplitter, with the high-power portion used as the THz generation
Fig. 2.4 Schematic diagram of the THz time-domain spectrometer built to perform the majority of
the experimental work presented in this thesis
2 Terahertz Time-Domain Spectroscopy
the value of δ will alter the polarisation sensitivity of the detecton system. If θ = 0,
having δ = 0 will result in detection of the E 011 component of the THz pulse only,
whilst rotating the HWP by 22.5
◦ will therefore allow detection of the orthogonal
E 211 component only. Detection of both components allows the resolution of the full
THz polarisation state, by considering the two detected waveforms as the projections
of the THz pulse onto the lab x- and y-planes.
2.3 THz-TDS Experimental Setup
This section will describe the constituent parts and operation of the THz time-domain
spectrometer used throughout the majority of experimental work presented in this
thesis. This spectrometer was designed and constructed by myself as a part of this
doctoral research project.
A schematic diagram of the spectrometer is presented in Fig. 2.4. The output of a
Ti:Sapphire oscillator (Spectra-Physics Mai Tai) is split into two beams by a 90%transmission beamsplitter, with the high-power portion used as the THz generation
Fig. 2.4 Schematic diagram of the THz time-domain spectrometer built to perform the majority of
the experimental work presented in this thesis