Theoretical and Computational Research on Nanophotonics and Quantum Optics
Selected Research Interests: nanophotonics, quantum optics, light-matter interactions, photonic crystals, cavity-QED, computational electromagnetics, optomechanics, disorder-induced scattering, metamaterials, quantum plasmonics.
Thanks for visiting our website. We carry out theoretical and computational investigations of the light-matter processes in photonic nanostructures, and explore the consequences of these for next-generation nano and quantum technologies. Our research blends a fascinating mix of condensed matter physics, optics, quantum mechanics, nano physics, and computational physics. We collaborate with leading laboratories throughout the world, with a focus on applicable theoretical physics that is interesting from a fundamental physics perspective and has potential applications, especially in quantum technologies. We particularly enjoy collaborating with experimental groups. Our work is funded by various funding bodies, including NSERC, CIFAR, MRI Ontario, CFI, and Queen's University.
My students, collaborators and I are interested in optics and condensed matter physics on the nanoscale. Nanoscale materials contain spatial features that are on the nm (nanometer) length scale, which is about 1-50,000th the width of a human hair or the length of only 10H atoms! This incredibly small size gives rise to a range of exciting new optical regimes where it is now possible to confine and manipulate individual photons and excitons (or electron-hole pairs) simultaneously. Research projects encompass a broad spectrum of fundamentals and applications, and include the study of classical optics, quantum optics and nonlinear optics in a variety of photonic nanostructures such as photonic crystals, single quantum dots, dot complexes and nanowires. We tend to tackle both important and challenging problems, including some of the realities that are usually ignored, such as the effects of fabrication imperfections (structural disorder), material loss, and decoherence on light scattering.
Latest Group News
#June 22: Nishan's paper published in Physical Review Letters! Soliton Pulse Propagation in the Presence of Disorder-Induced Multiple Scattering in Photonic Crystal Waveguides (e-print: arXiv:1608.08281 )
#June: Two of our accelerated MSc students get in the top ten of the 2017 Canadian University Prize Exam! Congratulations to Chris Gustin and Gavin Crowder (and Gavin is in still in 3rd year!!). The announcement is here
#Apr 20, 2017: New quantum optics paper published in ACS Photonics: Mohsen Kamandar Dezfouli, Stephen Hughes, Quantum Optics Model of Surface Enhanced Raman Spectroscopy for Arbitrarily Shaped Plasmonic Resonators
#Apr 17, 2017: New paper with Amr Helmy's group published in Physical Review A - Simon Axelrod, Mohsen Kamandar Dezfouli, Herman M. K. Wong, Amr S. Helmy, Stephen Hughes, Hyperbolic metamaterial nanoresonators make poor single-photon sources (arXiv)
#Mar 31, 2017: Nishan Mann successfully defends his PhD on disorder-induced scatteering and nonlinear optics in photonic crystal waveguides. Congratulations Nishan!
#Feb 8, 2017: New paper with Girish Agarwal published in Physics Review Letters - S. Hughes and G.S. Agarwal, Anisotropy-Induced Quantum Interference and Population Trapping Between Orthogonal Quantum Dot Exciton States in Semiconductor Cavity Systems or arXiv link
#Jan 27, 2017: New paper on hybrid quantum plasmonic structures published in Physical Review A - Mohsen Kamandar Dezfouli, Reuven Gordon, and Stephen Hughes, Modal theory of modified spontaneous emission of a quantum emitter in a hybrid plasmonic photonic-crystal cavity system or arXiv link
#Jan 24, 2017: Will Cartar successfully defends accelerated masters thesis on modelling quantum dot ensembles coupled to photonic crystal cavity lasers. Congratulations Will!
#*Dec, 2016: New paper with Peter Micher's group published in New Journal of Physics - Probing the transition from dressed states to the AC Stark effect in cavity-driven quantum dot-micropillar systems, New J. Phys 18, 123031 (2016).
#November, 2016: Steve is elected a Fellow of the Optical Society of America. link
#October, 2016: Nishan Mann wins one of the annual TA awards - congratulates Nishan! link
#April, 2016: Simon Axelrod wins Canadian University Physics Exam (placing first in Canada!) link
Paper with U. Bristol group on spin photon entanglers in photon crystal waveguides published in Physical Review Letters and selected for the Editors Choice.
#Aug, 2015: Gerry Angelatos successfully defends his Masters 1 year early (!), as the first student to pass through our elite accelerated masters program. Congratulations Gerry and good luck at Princeton for the PhD! Check his his cool thesis work on quantum dots in nanowire photonic crystals here. photo
#April, 2015: Steve gives a public lecture as part of one of the Queen's Prizes for Excellence in Research. link
#March, 2015: Viewpoint article with Howard Carmichael in the APS Physics forum
explain how phonons and crystal vibrations can invert a single quantum dot exciton!
* Post-doctoral fellows: Please inquire.
Latest Research Works and Arxiv Papers
See publications page or click here:
Selected Scientific Publications
* J143. Hargart, Fabian; Roy Choudhury, Kaushik; John, Tilmann; Portalupi, Simone; Schneider, Christian; Hoefling, Sven; Kamp, Martin; Hughes, Stephen; Michler, Peter, Probing the transition from dressed states to the AC Stark effect in cavity-driven quantum dot-micropillar systems, New J. Phys 18, 123031 (2016).
* J141. Manuel Kraft, Sven Moritz Hein, Judith Lehnert, Eckehard Scholl, Stephen Hughes, Andreas Knorr, Time-delayed quantum coherent Pyragas feedback control of photon squeezing in a degenerate parametric oscillator, Phys Rev A, 94, 023806 (2016), e-print: arXiv:1603.07137
* J138. Gerasimos Angelatos, Stephen Hughes, Polariton waveguides from a quantum dot chain in a nanowire photonic crystal: an architecture for waveguide QED, Optica 3, 370 (2016)
* J136. Fabian Hargart, Markus Muller, Kaushik Roy-Choudhury, Simone Luca Portalupi, Christian Schneider, Sven Hofling, Martin Kamp, Stephen Hughes, Peter Michler, Cavity-enhanced simultaneous dressing of quantum dot exciton and biexciton states, Phys. Rev. B 93, 115308 (2016), e-print: arXiv:1509.03861
* J133. K. Roy-Choudhury and S. Hughes, Quantum theory of light emission from quantum dots coupled to structured photonic reservoirs and acoustic phonons, Phys. Rev. B 92, 205406 (2015). e-print: arXiv:1504.03356
* J131. Andrew B. Young, Arthur Thijssen, Daryl M. Beggs, Petros Androvitsaneas, L. Kuipers, John G. Rarity, Stephen Hughes, Ruth Oulton, Polarization engineering in photonic crystal waveguides for spin-photon entanglers, Physical Review Letters 115, 153901 (2015), and selected as an Editor's Choice. See also arXiv:1406.0714
* J129. Nishan Mann, Alisa Javadi, P.D. Garcia, Peter Lodahl, Stephen Hughes, Theory and experiments of disorder-induced resonance shifts and mode edge broadening in deliberately disordered photonic crystal waveguides, e-print: arXiv:1505.02836 (2015), Phys. Rev. A 92, 023849 (2015).
* J124. K. Roy-Choudhury and S. Hughes, Spontaneous emission from a quantum dot in a structured photonic reservoir: phonon-mediated breakdown of Fermi's golden rule, e-print: arXiv:1406.3649, Optica 2, 434 (2015).
* J122. S. Hughes and H.J. Carmichael, Viewpoint: Crystal Vibrations Invert Quantum Dot Exciton, Physics 8, 29 (2015).
* J120. Rong-Chun Ge, Philip Trost Kristensen, Jeff. F. Young, Stephen Hughes, Quasinormal mode approach to modelling light-emission and propagation in nanoplasmonics, e-print: arXiv:1312.2939 [quant-ph], New J. Phys 16, 113048 (2014).
* J115. Philip Trost Kristensen and Stephen Hughes, Modes and Mode Volumes of Leaky Optical Cavities and Plasmonic Nanoresonators, ACS Photonics 1, 2-10 (2014), Perspective paper in the very first edition of ACS Photonics and also selected for the Cover Page, see also e-print: arXiv:1312.5769
* J113. S. Hughes and H. J. Carmichael, Phonon-mediated population inversion in a semiconductor quantum-dot cavity system, N. J. Phys. 15, 053039 (2013).
* J112. Rong-Chun Ge, C. Van Vlack, P. Yao, Jeff. F. Young, S. Hughes, Accessing quantum nanoplasmonics in a hybrid quantum-dot metal nanosystem: Mollow triplet of a quantum dot near a metal nanoparticle, Phys. Rev. B 87, 205425 (2013).
* J107. S. Weiler., A. Ulhaq, S. M. Ulrich, D. Richter, M. Jetteri, P. Michler, C. Roy, and S. Hughes, Phonon-assisted incoherent excitation of a quantum dot and its emission properties, Phys. Rev. B Rapid Communications 86, 241304 (2012).
* J106. C. Van Vlack and S. Hughes, Finite-difference time-domain technique as an efficient tool for obtaining the regularized Green function: applications to the local field problem in quantum optics for inhomogeneous lossy materials, Optics Letters 37, 2880 (2012).
* J105. Philip Kristensen, Cole Van Vlack, Stephen Hughes, Generalized mode volume for leaky optical cavities, Optics Letters 37, 1649 (2012).
* J100. C. Roy and S. Hughes, Influence of electron-acoustic phonon scattering on intensity power broadening in a coherently driven quantum-dot cavity system, Phys. Rev. X 1, 021009 (2011)
* J99. S. Hughes and H. J. Carmichael, Stationary inversion of a two level system coupled to an off-resonant cavity with strong dissipation, Phys. Rev. Lett. 107, 193601 (2011).
* J97. C. Roy and S. Hughes, Phonon-dressed Mollow triplet in the regime of cavity-QED: Excitation-induced dephasing and nonperturbative cavity feeding effects, Phys. Rev. Lett. 106, 247403 (2011).
* J88. P. Yao, V.S.C. Manga Rao, and S. Hughes, On-chip single photon sources using planar photonic crystals and single quantum dots, Laser and Photonics Reviews 4, 499 (2010).
* J83. P. Yao, C. Van Vlack, A. Reza, M. Patterson, M.M. Dignam, and S. Hughes, Ultrahigh Purcell factors and Lamb shifts in slow light metamaterial waveguides, Phys. Rev. B 80, 195106 (2009).
* J82. M. Patterson, S. Hughes, S. Schulz, D. M. Beggs, T. P. White, L. O.Faolain, and T. F. Krauss, Disorder-induced incoherent scattering losses in photonic crystal waveguides: Bloch mode reshaping, multiple scattering, and breakdown of the Beer-Lambert law, Phys. Rev. B 80, 195305 (2009).
* J77. M. Patterson, S. Hughes, S. Combie, N.-V. Quynh Tran, A. De Rossi, R. Gabet and Y. Jaouen, Disorder-induced coherent scattering in slow-light photonic crystal waveguides, Phys. Rev. Lett. 102, 253903 (2009)
* J70. A. Reza, M.M. Dignam, and S. Hughes, Can light be stopped in realistic metamaterials?, Nature (Communication Arising), 23, 10 (2008).
* J66. V.S.C. Manga Rao and S. Hughes, Single quantum dot spontaneous emission in a finite-size photonic crystal waveguide: Proposal for an efficient ''on chip'' single photon gun, Phys. Rev. Lett. 99, 193901 (2007).
* J65. S. Hughes, Coupled cavity QED using planar photonic crystals, Phys. Rev. Lett. 98, 083606 (2007).
* J64. C. Van Vlack and S. Hughes, Carrier-envelope-offset phase control of ultrafast optical rectification in resonantly excited semiconductors, Phys. Rev. Lett. 98, 167404 (2007).
* J56. S. Hughes, Modified spontaneous emission and qubit entanglement from dipole-coupled quantum dots in a photonic crystal nanocavity, Phys. Rev. Lett. 94, 227402 (2005).
* J54. S. Hughes, L. Ramunno, Jeff. F. Young, J. E. Sipe, Extrinsic optical scattering loss in photonic crystal waveguides: Role of fabrication disorder and photon group velocity, Phys. Rev. Lett. 94, 033903 (2005).
* J37. S. Hughes and D. S. Citrin, High-Field Franz-Keldysh Effect and Exciton Ionization in Semiconductor Quantum Wires, Phys. Rev. Lett. 84, 4228 (2000).
* J26. S. Hughes, Breakdown of the Area Theorem: Carrier-Wave Rabi Flopping of Femtosecond Optical Pulses, Phys. Rev. Lett. 81, 3363 (1998).
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© S. Hughes Group, Department of Physics, Engineering Physics & Astronomy