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Localized surface plasmon effects in ZnO sandwiched gold nanoparticles under fs pumping (2015)
Conference Proceeding
Bongu, S. R., Bisht, P. B., Namboodri, R. C., Ali, S. A., Kelly, T. J., Costello, J. T., …Kasiviswanathan, S. (2015). Localized surface plasmon effects in ZnO sandwiched gold nanoparticles under fs pumping. In 2015 IEEE Photonics Conference (IPC), 212-213. doi:10.1109/IPCon.2015.7323479

Nonlinear optical properties of gold nanoparticles (AuNPs) embedded ZnO thin films have been studied at 400 nm. While the AuNPs thin film shows the effect of saturable absorption, AuNPs embedded ZnO film exhibits the RSA behaviour.

Enhanced two photon absorption cross section and optical nonlinearity of a quasi-octupolar molecule (2015)
Journal Article
Namboodiri, C., Bongu, S., Bisht, P., Mukkamala, R., Chandra, B., Aidhen, I., …Costello, J. (2016). Enhanced two photon absorption cross section and optical nonlinearity of a quasi-octupolar molecule. Journal of Photochemistry and Photobiology A: Chemistry, 314, 60-65. doi:10.1016/j.jphotochem.2015.08.016

Two photon absorption (2PA) cross sections of two quasi-octupolar molecules (E,E,E)-2,4,6-tris [2-(4-N,N-diphenylaminophenyl)vinyl]pyridine (DPATSP) and (2,4,6-tris((E)-4-(diphenylamino)styryl)-1-methylpyridine-1-ium iodide, DPATSP-Me) have been esti... Read More about Enhanced two photon absorption cross section and optical nonlinearity of a quasi-octupolar molecule.

Advanced undergraduate RC circuits: An experimentalist's perspective (2015)
Journal Article
Kelly, T. J. (2015). Advanced undergraduate RC circuits: An experimentalist's perspective. European Journal of Physics, 36(5), 055041. doi:10.1088/0143-0807/36/5/055041

In this paper, an advanced undergraduate RC circuit is studied in two different ways. The circuit is a typical series RC circuit with a time-varying voltage source. The temporal profile of the voltage is an isolated, Gaussian shaped pulse. The voltag... Read More about Advanced undergraduate RC circuits: An experimentalist's perspective.

Sensitivity of nonlinear photoionization to resonance substructure in collective excitation (2015)
Journal Article
Mazza, T., Karamatskou, A., Ilchen, M., Bakhtiarzadeh, S., Rafipoor, A. J., O’Keeffe, P., …Santra, R. (2015). Sensitivity of nonlinear photoionization to resonance substructure in collective excitation. Nature communications, 6(1), 6799-1-6799-6. https://doi.org/10.1038/ncomms7799

Collective behaviour is a characteristic feature in many-body systems, important for developments in fields such as magnetism, superconductivity, photonics and electronics. Recently, there has been increasing interest in the optically nonlinear respo... Read More about Sensitivity of nonlinear photoionization to resonance substructure in collective excitation.

Detection limits of organic compounds achievable with intense, short-pulse lasers (2015)
Journal Article
Miles, J., De Camillis, S., Alexander, G., Hamilton, K., Kelly, T. J., Costello, J. T., …Greenwood, J. B. (2015). Detection limits of organic compounds achievable with intense, short-pulse lasers. The Analyst, 140(12), 4270-4276. doi:10.1039/c5an00529a

Many organic molecules have strong absorption bands which can be accessed by ultraviolet short pulse lasers to produce efficient ionization. This resonant multiphoton ionization scheme has already been exploited as an ionization source in time-of-fli... Read More about Detection limits of organic compounds achievable with intense, short-pulse lasers.