Zobrazeno 1 - 10
of 121
pro vyhledávání: '"Kundys D"'
Autor:
Kundys, D., Cascales, A., Makhort, A. S., Majjad, H., Chevrier, F., Doudin, B., Fedrizzi, A., Kundys, B.
Publikováno v:
Phys. Rev. Applied 13, 064034 (2020)
Achieving optical operation of logic elements, especially those that involve 2D layers, can open the long sought era of optical computing. However, the efficient optical modulation of the electronic properties of 2D materials including memory effect
Externí odkaz:
http://arxiv.org/abs/2003.08432
Publikováno v:
Phys. Rev. Materials 2, 012401 (2018)
Ferroelectric photovoltaic materials are an alternative to semiconductor-based photovoltaics and offer the advantage of above bandgap photovoltage generation. However, there are few known compounds, and photovoltaic efficiencies remain low. Here, we
Externí odkaz:
http://arxiv.org/abs/1801.04870
Autor:
Kundys, D., Van Duppen, B., Marshall, O. P., Rodriguez, F., Torre, I., Tomadin, A., Polini, M., Grigorenko, A. N.
Graphene is known to possess strong optical nonlinearity. Its nonlinear response can be further enhanced by graphene plasmons. Here, we report a novel nonlinear electro-absorption effect observed in nanostructured graphene due to excitation of graphe
Externí odkaz:
http://arxiv.org/abs/1705.09739
Autor:
Kundys, D., Sutherland, D., Davies, M., Oehler, F., Griffiths, J., Dawson, P., Kappers, M. J., Humphreys, C. J., Schulz, S., Tang, F., Oliver, R. A.
Publikováno v:
Science and Technology of Advanced Materials, 17, (2016)
In this paper we report on a comparative study of the low temperature emission and polarisation properties of InGaN/GaN quantum wells (QWs) grown on nonpolar a-plane and m-plane free-standing bulk GaN substrates where the In content varied from 0.14
Externí odkaz:
http://arxiv.org/abs/1612.06353
Publikováno v:
Appl. Phys. Lett. 107, 182901 (2015)
Planar electrodes patterned on a ferroelectric substrate are shown to provide lateral control of the conductive state of a two-terminal graphene stripe. A multi-level and on-demand memory control of the graphene resistance state is demonstrated under
Externí odkaz:
http://arxiv.org/abs/1511.04616
Autor:
Chapman, J., Su, Y., Howard, C. A., Kundys, D., Grigorenko, A., Guinea, F., Geim, A. K., Grigorieva, I. V., Nair, R. R.
Publikováno v:
Scientific Reports 6, 23254 (2016)
Graphene, a zero-gap semimetal, can be transformed into a metallic, semiconducting or insulating state by either physical or chemical modification. Superconductivity is conspicuously missing among these states despite considerable experimental effort
Externí odkaz:
http://arxiv.org/abs/1508.06931
Autor:
Garcia-Deniz, A. Z., Murzyn, P., Fox, A. M., Kundys, D. O., Wells, J-P. R., Whittaker, D. M., Skolnick, M. S., Krauss, T. F., Roberts, J. S.
Publikováno v:
Physical Review B 74, 165327 (2006)
We report an ultrafast optical tuning of the reflectivity of AlGaAs/InAlGaAs multiple quantum well photonic crystal waveguides using a reflection geometry, pump-probe technique.
Externí odkaz:
http://arxiv.org/abs/1402.2677
Autor:
Kundys, D. O., Murzyn, P., Wells, J. P. R., Tartakovskii, A. I., Skolnick, M. S., Dang, Le Si, Lutsenko, E. V., Tarasuk, N. P., Lyublinskaya, O. G., Toropov, A. A., Ivanov, S. V.
Publikováno v:
Journal of Applied Physics 100, 123510 (2006)
We have used the variable stripe technique and pump-probe spectroscopy to investigate both gain and the dynamics of amplified spontaneous emission from CdSe quantum dot structures. We have found modal gain coefficients of 75 and 32 1/cm for asymmetri
Externí odkaz:
http://arxiv.org/abs/1401.4325
Autor:
Kundys, D. O., Wells, J. -P. R., Andreev, A. D., Hashemizadeh, S. A., Wang, T., Parbrook, P. J., Fox, A. M., Mowbray, D. J., Skolnick, M. S.
Publikováno v:
Physical Review B 73, 165309 ?2006?
We report on two pulse, degenerate four wave mixing (DFWM) measurements on shallow InGaN/GaN multi-quantum wells (MQWs) grown on sapphire substrates. These reveal pulse length limited signal decays. We have found a 10:1 resonant enhancement of the DF
Externí odkaz:
http://arxiv.org/abs/1401.3156
Publikováno v:
Nature Materials, 9, 803 (2010)
Multifunctional oxides are promising materials because of their fundamental physical properties as well as their potential in applications1. Among these materials, multiferroics exhibiting ferroelectricity and magnetism are good candidates for spin e
Externí odkaz:
http://arxiv.org/abs/1011.3398