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High Purcell factor generation of indistinguishable on-chip single photons (2018)
Journal Article
Liu, F., Brash, A. J., O’Hara, J., Martins, L. M., Phillips, C. L., Coles, R. J., …Fox, A. M. (2018). High Purcell factor generation of indistinguishable on-chip single photons. Nature nanotechnology, 13(9), 835-840. doi:10.1038/s41565-018-0188-x

On-chip single-photon sources are key components for integrated photonic quantum technologies. Semiconductor quantum dots can exhibit near-ideal single-photon emission, but this can be significantly degraded in on-chip geometries owing to nearby etch... Read More

Electrical control of nonlinear quantum optics in a nano-photonic waveguide (2018)
Journal Article
Hallett, D., Foster, A. P., Hurst, D. L., Royall, B., Kok, P., Clarke, E., …Wilson, L. R. (2018). Electrical control of nonlinear quantum optics in a nano-photonic waveguide. Optica, 5(5), 644-650. doi:10.1364/optica.5.000644

© 2018 Optical Society of America. Quantum photonics is a rapidly developing platform for future quantum network applications. Waveguide-based architectures, in which embedded quantum emitters act as both nonlinear elements to mediate photon–photon i... Read More

Single-photon electroluminescence for on-chip quantum networks (2016)
Journal Article
Bentham, C., Hallett, D., Prtljaga, N., Royall, B., Vaitiekus, D., Coles, R. J., …Wilson, L. R. (2016). Single-photon electroluminescence for on-chip quantum networks. Applied physics letters, 109(16), (161101). doi:10.1063/1.4965295. ISSN 0003-6951

An electrically driven single-photon source has been monolithically integrated with nano-photonic circuitry. Electroluminescent emission from a single InAs/GaAs quantum dot (QD) is channelled through a suspended nanobeam waveguide. The emission line... Read More

On-chip electrically controlled routing of photons from a single quantum dot (2015)
Journal Article
Itskevich, I. E., Bentham, C., Clarke, E., Coles, R. J., Fox, A. M., O'Hara, J., …Wilson, L. R. (2015). On-chip electrically controlled routing of photons from a single quantum dot. Applied physics letters, 106(22), doi:10.1063/1.4922041. ISSN 0003-6951

Electrical control of on-chip routing of photons emitted by a single InAs/GaAs self-assembled quantum dot (SAQD) is demonstrated in a photonic crystal cavity-waveguide system. The SAQD is located inside an H1 cavity, which is coupled to two photonic... Read More

Modeling and analysis of intraband absorption in quantum-dot-in-well mid-infrared photodetectors (2012)
Journal Article
Hong, B. H., Rybchenko, S. I., Itskevich, I. E., Haywood, S. K., Haywood, S., Itskevich, I., …Vines, P. (2012). Modeling and analysis of intraband absorption in quantum-dot-in-well mid-infrared photodetectors. Journal of applied physics, 111(3), (033713). doi:10.1063/1.3684603. ISSN 0021-8979

Intraband absorption in quantum-dot-in-a-well (DWELL) mid-infrared photodetectors is investigated using photocurrent spectroscopy and computationally cost-effective modeling linked to experimental data. The DWELL systems are challenging for modeling... Read More

Modeling of intraband absorption for quantum dot-in-well structures with low computational cost (2010)
Journal Article
Rybchenko, S. I., Hong, B. H., Itskevich, I. E., Haywood, S. K., Tan, C. H., Vines, P., & Hugues, M. (2010). Modeling of intraband absorption for quantum dot-in-well structures with low computational cost. Journal of Physics: Conference Series, 242(1), doi:10.1088/1742-6596/242/1/012013. ISSN 1742-6588

Much effort has been committed to development of quantum-dot-based infrared photodetectors owing to their potential for normal-incidence absorption and low dark current.Quantum-dot-in-well structures offer additional advantages, such as better wavele... Read More

Strained arrays of colloidal nanoparticles: Conductance and magnetoresistance enhancement (2009)
Journal Article
Haywood, S. K., Itskevich, I. E., Paunov, V. N., Rybchenko, S. I., & Dyab, A. K. F. (2009). Strained arrays of colloidal nanoparticles: Conductance and magnetoresistance enhancement. Nanotechnology, 20(42), doi:10.1088/0957-4484/20/42/425607. ISSN 0957-4484

Colloidal nanoparticles are very popular as building blocks of functional arrays for electronic and optical applications. However, there is a problem in achieving electrical conductivity in such nanoarrays due to their molecular shells. These shells,... Read More

L-band-related interband transition in InSb/GaSb self-assembled quantum dots (2008)
Book
Rybchenko, S. I., Gupta, R., Itskevich, I. E., & Haywood, S. K. (2008). L-band-related interband transition in InSb/GaSb self-assembled quantum dots. Springer Proceedings in Physics; Narrow Gap Semiconductors 2007, 81-83. Springer Verlag. doi:10.1007/978-1-4020-8425-6_20

Effect of lattice-mismatch-induced strain on Γ-, X- and L-conduction-band edges in III-V self-assembled quantum dots has been calculated. The misfit strain is shown to strongly affect the band edges, leading to a possibility of Γ-L and &G... Read More

Conduction-band crossover induced by misfit strain in InSb/GaSb self-assembled quantum dots (2007)
Journal Article
Tournié, E., Baranov, A. N., Deguffroy, N., Tasco, V., Itskevich, I. E., Gupta, R., …Haywood, S. K. (2007). Conduction-band crossover induced by misfit strain in InSb/GaSb self-assembled quantum dots. Physical review B: Condensed matter and materials physics, 76(19), 0 - 0. doi:10.1103/physrevb.76.193309

We address the occurrence of conduction-band crossover in III-V self-assembled quantum dots solely due to misfit strain. Band structure analysis in terms of standard deformation-potential theory shows that Γ-X crossover can occur in the dot, while bo... Read More

Importance of aspect ratio over shape in determining the quantization potential of self-assembled zinc-blende III-V quantum dots (2007)
Journal Article
Gupta, R., Yeap, G., Rybchenko, S. I., Itskevich, I. E., & Haywood, S. K. (2007). Importance of aspect ratio over shape in determining the quantization potential of self-assembled zinc-blende III-V quantum dots. Journal of applied physics, 102(1), 013706. doi:10.1063/1.2752127

We have studied the effect of shape on the strain-modified electron/hole confinement potential in zinc-blende quantum dots (QDs), using standard deformation potential theory and an anisotropic continuum-elasticity approximation. Calculations were per... Read More

Tuning of electronic coupling between self-assembled quantum dots (2005)
Journal Article
Rybchenko, S., Itskevich, I., Skolnick, M. S., Cahill, J., Tartakovskii, A. I., Hill, G., & Hopkinson, M. (2005). Tuning of electronic coupling between self-assembled quantum dots. Applied physics letters, 87(3), 033104. doi:10.1063/1.1995953

Semiconductor self-assembled quantum dots (SAQDs) normally have zero-dimensional properties, but become coupled and acquire higher-dimensional character if the distance between the dots is small. Using photoluminescence spectroscopy under high hydros... Read More

High pressure as a tool to tune electronic coupling in self-assembled quantum dot nanostructures (2004)
Journal Article
Itskevich, E., Hopkinson, M., Hill, G., Skolnick, M., Tartakovskii, A., Cahill, J., …Itskevich, I. (2004). High pressure as a tool to tune electronic coupling in self-assembled quantum dot nanostructures. physica status solidi (b), 241(14), 3257-3262. doi:10.1002/pssb.200405235

High pressure provides an efficient way of controlling the electronic properties of semiconductor nanostructures. We use pressure to tune electronic coupling in stacks of self-assembled quantum dots (SAQDs). The coupling occurs as soon as the distanc... Read More

Stark shift in electroluminescence of individual InAs quantum dots (2000)
Journal Article
Parnell, S., Henini, M., Eaves, L., Main, P., Levin, A., Stoddart, S., …Itskevich, I. (in press). Stark shift in electroluminescence of individual InAs quantum dots. Applied physics letters, 76(26), 3932-3934. doi:10.1063/1.126825

We have fabricated light-emitting-diode heterostructure devices, in which a layer of InAs self-assembled quantum dots is embedded, with an active area of submicron size. In the electroluminescence spectra of these devices, we observed isolated narrow... Read More

Electroluminescence from individual InAs self-assembled quantum dots (2000)
Journal Article
Itskevich, I., Stoddart, S., Rybchenko, S., Tartakovskii, I., Eaves, L., Parnell, S., …Henini, M. (2000). Electroluminescence from individual InAs self-assembled quantum dots. Physica status solidi. A, Applied research, 178(1), 307-311. doi:10.1002/1521-396X(200003)178:13.0.CO;2-Y

Emission lines from individual InAs self-assembled quantum dots (SAQD) have been observed in electroluminescence spectra from small-area p-i-n light-emitting-diode heterostructure devices containing an embedded layer of SAQD. In the energy range whic... Read More