Publications (23)
Pitchfork Bifurcation and Zharov Splitting in Nonlinear Mid-infrared Photothermal Spectroscopy in a liquid crystal using a Quantum Cascade Laser
Alket Mertiri, Hatice Altug, M. K. Hong +4
We report on the mid-infrared nonlinear photothermal spectrum of the neat liquid crystal 4-Octyl-4'-Cyanobiphenyl (8CB) using a tunable Quantum Cascade Laser (QCL). The nonequilibr…
Unconventional high-harmonic generation in resonant membrane metasurfaces
Pavel Tonkaev, Felix Richter, Ivan Toftul +5
High-harmonic generation (HHG) in solids has rapidly emerged as a promising platform for creating compact attosecond sources and probing ultrafast electron dynamics. Resonant metas…
Low-Threshold Surface-Passivated Photonic Crystal Nanocavity Laser
Dirk Englund, Hatice Altug, Jelena Vuckovic
The efficiency and operating range of a photonic crystal laser is improved by passivating the InGaAs quantum well (QW) gain medium and GaAs membrane using an (NH4)S treatment. The…
Two-dimensional coupled photonic crystal resonator arrays
Hatice Altug, Jelena Vuckovic
We present the design and fabrication of photonic crystal structures exhibiting electromagnetic bands that are flattened in all crystal directions, i.e., whose frequency variation…
Digital nanophotonic biosensing empowered by silicon Mie voids
Daniil Riabov, Abtin Saateh, Wenhong Yang +3
Optical biosensors are indispensable in medical and environmental diagnostics, yet existing approaches are fundamentally limited in their sensitivity due to ensemble-averaged measu…
Infrared photonics for healthcare: A roadmap for proactive and predictive health management
Borislav Hinkov, Johannes Kunsch, Werner Mäntele +82
The field of infrared (IR) photonics is currently undergoing remarkable progress, moving rapidly towards practical sensing applications demanded by medical therapy and diagnostics…
Spectral tuning of high-harmonic generation with resonance-gradient metasurfaces
Piyush Jangid, Felix Ulrich Richter, Ming Lun Tseng +4
High-index dielectric subwavelength structures and metasurfaces are capable of enhancing light-matter interaction by orders of magnitude via geometry-dependent optical resonances.…
A nonreciprocal optical resonator with broken time-invariance for arbitrarily high time-bandwidth performance
Ivan Cardea, Davide Grassani, Simon J. Fabbri +6
Most present-day resonant systems, throughout physics and engineering, are characterized by a strict time-reversal symmetry between the rates of energy coupled in and out of the sy…
Experimental demonstration of the slow group velocity of light in two-dimensional coupled photonic crystal microcavity arrays
Hatice Altug, Jelena Vuckovic
We recently proposed two-dimensional coupled photonic crystal microcavity arrays as a route to achieve a slow-group velocity of light (flat band) in all crystal directions. In this…
Mid-IR Light Modulators Enabled by Dynamically Tunable Ultra High-Q Silicon Membrane Metasurfaces
Felix Ulrich Brikh, Aleksei Ezerskii, Olesia Pashina +6
Metasurfaces have emerged as a powerful platform to control free-space light at the subwavelength scale, enabling applications in sensing, lasing, nonlinear optics, and quantum pho…
Terahertz Room-Temperature Photonic Crystal Nanocavity Laser
Dirk Englund, Hatice Altug, Ilya Fushman +1
We describe an efficient surface-passivated photonic crystal nanocavity laser, demonstrating room-temperature operation with 3-ps total pulse duration (detector response limited) a…
Chirality encoding in resonant metasurfaces governed by lattice symmetries
Ivan Sinev, Felix Ulrich Richter, Ivan Toftul +6
Chiral metasurfaces provide invaluable tools capable of controlling structured light required for biosensing, photochemistry, holography, and quantum photonics. Here we suggest and…
Mid-Infrared Plasmonic Biosensing with Graphene
Daniel Rodrigo, Odeta Limaj, Davide Janner +4
Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. However, infrared light interacts poorly with n…
Plasmon-enhanced circular dichroism spectroscopy of chiral drug solutions
Matteo Venturi, Raju Adhikary, Ambaresh Sahoo +9
We investigate the potential of surface plasmon polaritons at noble metal interfaces for surface-enhanced chiroptical sensing of dilute chiral drug solutions. The high quality fact…
Ultrafast broadband tuning of resonant optical nanostructures using phase change materials
Miquel Rudé, Vahagn Mkhitaryan, Arif E. Cetin +6
The functionalities of a wide range of optical and opto-electronic devices are based on resonance effects and active tuning of the amplitude and wavelength response is often essent…
Time-resolved lasing action from single and coupled photonic crystal nanocavity array lasers emitting in the telecom-band
Dirk Englund, Hatice Altug, Jelena Vuckovic
We measure the lasing dynamics of single and coupled photonic crystal nanocavity array lasers fabricated in the indium gallium arsenide phosphide material system. Under short optic…
Optical Control of Chirality by Ultrafast Symmetry Breaking in Membrane Metasurfaces
Nikita Glebov, Alena Mamonova, Olesia Pashina +7
Chirality underpins a wide range of light-matter interactions, yet methods for its dynamic control in photonic systems remain limited. Here, we demonstrate ultrafast all-optical co…
Metasurface-Enhanced Mid-Infrared Imaging Spectroscopy with Broadband Quantum Cascade Lasers
Ivan Sinev, Alessio Cargioli, Diego Piciocchi +3
Mid-infrared (mid-IR) spectroscopy offers unparalleled opportunities in sensing through chemically specific detection of molecular absorption fingerprints. Yet, its practical appli…
Polarization control and sensing with two-dimensional coupled photonic crystal microcavity arrays
Hatice Altug, Jelena Vuckovic
We have experimentally studied polarization properties of the two-dimensional coupled photonic crystal microcavity arrays, and observed a strong polarization dependence of the tran…
Molecular Chiral Response Enhanced by Crosstalking Quasi-Bound States in the Continuum
Diana Shakirova, Adrià Canós Valero, Daniil Riabov +3
Identifying the handedness of chiral molecules is of fundamental importance in chemistry, biology, pharmacy, and medicine. Nanophotonic structures allow us to control light at the…
Plasmon coupling in extended structures: Graphene superlattice nanoribbon arrays
Daniel Rodrigo, Tony Low, Damon B. Farmer +2
Interactions between localized plasmons in proximal nanostructures is a well-studied phenomenon. Here we explore plasmon plasmon interactions in connected extended systems. Such sy…
Nonlinear chiral response governed by meta-atom rotation
Dhruv Hariharan, Pavel Tonkaev, Felix Ulrich Brikh +5
Chiral photonics provides powerful routes for controlling the light handedness, yet nonlinear chiral responses are typically associated with intricate three-dimensional systems. He…
Enhanced vibrational optical activity by near-zero index chiral effective media
Ashis Paul, Matteo Venturi, Raju Adhikary +8
The enhancement of the inherently weak optical activity of solvated molecules by superchiral fields, crucial for detecting their chirality, is a research frontier of photonics and…