38
2 Terahertz Time-Domain Spectroscopy
The orientation angle can then be obtained from the difference between the phase of
the right- and left-hand circular components of the wave, using
ψ(ω) =
φ + (ω) − φ − (ω)
2
.
(2.21)
2.5 Summary
This chapter has introduced and described the core experimental technique used
throughout this thesis, terahertz time-domain spectroscopy. Sections 2.1 and 2.2
detailed the methods of generating and detecting broadband THz radiation that have
been used in the work presented in this thesis. Section 2.3 described how these two
aspects are brought together to create a spectrometer, and the process of performing a THz-TDS experiment was described. Section 2.4 then explained the process of
extracting information from the time-domain data, both about the material properties
of samples under study, and the polarisation state of the detected THz pulses.
The rest of this thesis will build on the experimental techniques and concepts
introduced in this chapter, developing new THz-TDS methods and components, and
applying them to the study of anisotropic materials.
References
1. Auston DH, Smith PR (1983) Appl Phys Lett 43:631
2. Auston DH, Cheung KP, Valdmanis JA, Kleinman DA (1984) Phys Rev Lett 53:1555
3. Burford NM, El-Shenawee MO (2017) Opt Eng 56:010901
4. Rodriguez G, Taylor AJ (1996) Opt Lett 21:1046
5. Kim DS, Citrin DS (2006) Appl Phys Lett 88:161117
6. Dreyhaupt A, Winnerl S, Dekorsy T, Helm M (2005) Appl Phys Lett 86:1
7. Dreyhaupt A, Winnerl S, Helm M, Dekorsy T (2006) Opt Lett 31:1546
8. Beck M et al (2010) Opt Express 18:9251
9. Freeman JR, Beere HE, Ritchie DA (2013) Terahertz spectroscopy and imaging. Springer,
Berlin
10. Yajima T, Takeuchi N (1970) Jpn J Appl Phys 9:1361
11. Yang KH (1971) Appl Phys Lett 19:320
12. Hu BB, Zhang X-C, Auston DH, Smith PR (1990) Appl Phys Lett 56:506
13. Sutherland RL (2003) Handbook of nonlinear optics, 2nd edn. Dekker, New York
14. Nahata A, Weling AS, Heinz TF (1996) Appl Phys Lett 69:2321
15. Löffler T, Hahn T, Thomson M, Jacob F, Roskos H (2005) Opt Express 13:5353
16. Saleh BEA, Teich MC (1991) Polarization and crystal optics. In: Fundamentals of photonics,
pp 193–237. Wiley, New York
17. van der Valk NCJ, van der Marel WAM, Planken PCM (2005) Opt Lett 30:2802
18. Planken PCM, Nienhuys H-K, Bakker HJ, Wenckebach T (2001) J Opt Soc Amer B 18:313
2 Terahertz Time-Domain Spectroscopy
The orientation angle can then be obtained from the difference between the phase of
the right- and left-hand circular components of the wave, using
ψ(ω) =
φ + (ω) − φ − (ω)
2
.
(2.21)
2.5 Summary
This chapter has introduced and described the core experimental technique used
throughout this thesis, terahertz time-domain spectroscopy. Sections 2.1 and 2.2
detailed the methods of generating and detecting broadband THz radiation that have
been used in the work presented in this thesis. Section 2.3 described how these two
aspects are brought together to create a spectrometer, and the process of performing a THz-TDS experiment was described. Section 2.4 then explained the process of
extracting information from the time-domain data, both about the material properties
of samples under study, and the polarisation state of the detected THz pulses.
The rest of this thesis will build on the experimental techniques and concepts
introduced in this chapter, developing new THz-TDS methods and components, and
applying them to the study of anisotropic materials.
References
1. Auston DH, Smith PR (1983) Appl Phys Lett 43:631
2. Auston DH, Cheung KP, Valdmanis JA, Kleinman DA (1984) Phys Rev Lett 53:1555
3. Burford NM, El-Shenawee MO (2017) Opt Eng 56:010901
4. Rodriguez G, Taylor AJ (1996) Opt Lett 21:1046
5. Kim DS, Citrin DS (2006) Appl Phys Lett 88:161117
6. Dreyhaupt A, Winnerl S, Dekorsy T, Helm M (2005) Appl Phys Lett 86:1
7. Dreyhaupt A, Winnerl S, Helm M, Dekorsy T (2006) Opt Lett 31:1546
8. Beck M et al (2010) Opt Express 18:9251
9. Freeman JR, Beere HE, Ritchie DA (2013) Terahertz spectroscopy and imaging. Springer,
Berlin
10. Yajima T, Takeuchi N (1970) Jpn J Appl Phys 9:1361
11. Yang KH (1971) Appl Phys Lett 19:320
12. Hu BB, Zhang X-C, Auston DH, Smith PR (1990) Appl Phys Lett 56:506
13. Sutherland RL (2003) Handbook of nonlinear optics, 2nd edn. Dekker, New York
14. Nahata A, Weling AS, Heinz TF (1996) Appl Phys Lett 69:2321
15. Löffler T, Hahn T, Thomson M, Jacob F, Roskos H (2005) Opt Express 13:5353
16. Saleh BEA, Teich MC (1991) Polarization and crystal optics. In: Fundamentals of photonics,
pp 193–237. Wiley, New York
17. van der Valk NCJ, van der Marel WAM, Planken PCM (2005) Opt Lett 30:2802
18. Planken PCM, Nienhuys H-K, Bakker HJ, Wenckebach T (2001) J Opt Soc Amer B 18:313