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Temperature dependence of the upper-branch polariton population in an organic semiconductor microcavity (2011)
Journal Article
Coles, D. M., Michetti, P., Clark, C., Adawi, A. M., & Lidzey, D. G. (2011). Temperature dependence of the upper-branch polariton population in an organic semiconductor microcavity. Physical review B: Condensed matter and materials physics, 84(20), 205214-1 - 205214-8. doi:10.1103/PhysRevB.84.205214

We explore the distribution of polaritons along the upper polariton branch of a strongly coupled organic-semiconductor microcavity as a function of temperature following nonresonant optical excitation. Measurements of polariton emission from a high-f... Read More about Temperature dependence of the upper-branch polariton population in an organic semiconductor microcavity.

Spectroscopy and single-molecule emission of a fluorene-terthiophene oligomer (2011)
Journal Article
Khalil, G. E., Adawi, A. M., Robinson, B., Cadby, A. J., Tsoi, W. C., Kim, J., …Lidzey, D. G. (2011). Spectroscopy and single-molecule emission of a fluorene-terthiophene oligomer. Journal of Physical Chemistry B, 115(42), (12028-12035). doi:10.1021/jp206368g. ISSN 1520-6106

We study the thiophene-based oligomer poly[2,7-(9,9-bis(2′-ethylhexyl)fluorene)-alt-2,5-terthiophene] (PF3T) in solution and when dispersed at low concentration into a polynorbornene matrix. We find that at high concentration in solution the 0&... Read More about Spectroscopy and single-molecule emission of a fluorene-terthiophene oligomer.

Vibrationally assisted polariton-relaxation processes in strongly coupled organic-semiconductor microcavities (2011)
Journal Article
Coles, D. M., Michetti, P., Clark, C., Tsoi, W. C., Adawi, A. M., Kim, J. S., & Lidzey, D. G. (2011). Vibrationally assisted polariton-relaxation processes in strongly coupled organic-semiconductor microcavities. Advanced Functional Materials, 21(19), 3691-3696. doi:10.1002/adfm.201100756

If a semiconductor with an electronic transition that approximates a two-level system is placed within an optical cavity, strong coupling can occur between the confined photons and the semiconductor excitons. This coupling can result in the formation... Read More about Vibrationally assisted polariton-relaxation processes in strongly coupled organic-semiconductor microcavities.

Ultrafast polariton relaxation dynamics in an organic semiconductor microcavity (2011)
Journal Article
Virgili, T., Coles, D., Adawi, A. M., Clark, C., Michetti, P., Rajendran, S. K., …Lidzey, D. G. (2011). Ultrafast polariton relaxation dynamics in an organic semiconductor microcavity. Physical review B: Condensed matter and materials physics, 83(24), 245309. doi:10.1103/PhysRevB.83.245309

We study an organic semiconductor microcavity operating in the strong-coupling regime using fs pump-probe spectroscopy. By probing the induced absorption associated with the one-exciton to two-exciton transition, we are able to characterize the time-... Read More about Ultrafast polariton relaxation dynamics in an organic semiconductor microcavity.

Continuously tuneable optical filters from self-assembled block copolymer blends (2011)
Journal Article
Parnell, A. J., Pryke, A., Mykhaylyk, O. O., Howse, J. R., Adawi, A. M., Terrill, N. J., & Fairclough, J. P. A. (2011). Continuously tuneable optical filters from self-assembled block copolymer blends. Soft matter, 7(8), 3721. doi:10.1039/c0sm01320j

We demonstrate that two symmetric high molecular weight diblock copolymers, of differing molecular weights, can be blended together and subsequently shear aligned to form one photonic structure without macrophase separation. The lameller period depen... Read More about Continuously tuneable optical filters from self-assembled block copolymer blends.