Outputs (4)

Pulsed terahertz signal reconstruction (2007)
Journal Article
Fletcher, J., Swift, G., Dai, D., Chamberlain, J., & Upadhya, P. (2007). Pulsed terahertz signal reconstruction. Journal of Applied Physics, 102(11), https://doi.org/10.1063/1.2818361

A procedure is outlined which can be used to determine the response of an experimental sample to a single, simple broadband frequency pulse in terahertz frequency time domain spectroscopy (TDS). The advantage that accrues from this approach is that o... Read More about Pulsed terahertz signal reconstruction.

Spiroconjugation-enhanced intramolecular charge-transfer state formation in a polyspirobifluorene homopolymer (2007)
Journal Article
King, S., Hintschich, S., Dai, D., Rothe, C., & Monkman, A. (2007). Spiroconjugation-enhanced intramolecular charge-transfer state formation in a polyspirobifluorene homopolymer. Journal of Physical Chemistry C, 111(50), 18759-18764. https://doi.org/10.1021/jp0755138

In this work we demonstrate the complex excited-state behavior of polyspirobifluorene in the solid state, which, due to the interaction of the spiroconjugated side group, readily forms a charge-transfer (CT) excited state of lower energy than the sin... Read More about Spiroconjugation-enhanced intramolecular charge-transfer state formation in a polyspirobifluorene homopolymer.

Exciton annihilation in a polyfluorene: Low threshold for singlet-singlet annihilation and the absence of singlet-triplet annihilation (2007)
Journal Article
King, S., Dai, D., Rothe, C., & Monkman, A. (2007). Exciton annihilation in a polyfluorene: Low threshold for singlet-singlet annihilation and the absence of singlet-triplet annihilation. Physical review B, 76(8), https://doi.org/10.1103/physrevb.76.085204

Ultrafast photoinduced absorption measurements have been used to directly investigate singlet-singlet annihilation in polyfluorene. The pump fluence threshold for annihilation to dominate the decay was measured to be ∼1 μJ cm−2 corresponding to an ex... Read More about Exciton annihilation in a polyfluorene: Low threshold for singlet-singlet annihilation and the absence of singlet-triplet annihilation.

Propagation of terahertz radiation through random structures: an alternative theoretical approach and experimental validation (2007)
Journal Article
Fletcher, J., Swift, G., Dai, D. C., Levitt, J., & Chamberlain, J. (2007). Propagation of terahertz radiation through random structures: an alternative theoretical approach and experimental validation. Journal of Applied Physics, 101(1), Article 013102. https://doi.org/10.1063/1.2403860

A model describing the propagation of terahertz frequency radiation through inhomogeneous materials is proposed. In such materials (e.g., powders or clothing), the size of the scattering centers, their separation, and the wavelength of the radiation... Read More about Propagation of terahertz radiation through random structures: an alternative theoretical approach and experimental validation.