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Letter |
Strong mid-infrared photoresponse in small-twist-angle bilayer graphene
Owing to the superlattice-induced bandgap and superlattice-enhanced density of states, small-twist-angled (<2°) bilayer graphene exhibits a strong gate-tunable photoresponse in the mid-infrared regime of 5 to 12 μm, reaching an extrinsic peak responsivity of 26 mA W−1 at 12 μm.
- Bingchen Deng
- , Chao Ma
- & Fengnian Xia
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News & Views |
Two-dimensional optical edge detection
Using a photonic crystal slab combined with a conventional optical imaging system, a two-dimensional optical image differentiator is experimentally demonstrated for edge detection.
- Wei Yan
- & Min Qiu
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Article |
Exciton resonance tuning of an atomically thin lens
By harnessing the excitonic resonances of a monolayer of WS2 in the visible spectral range, large-area, actively tunable and atomically thin optical lenses can be realized.
- Jorik van de Groep
- , Jung-Hwan Song
- & Mark L. Brongersma
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Article |
Demonstration of sub-3 ps temporal resolution with a superconducting nanowire single-photon detector
Knowledge about detection latency provides a guideline to reduce the timing jitter of niobium nitride superconducting nanowire single-photon detectors. A timing jitter of 2.6 ps at visible wavelength and 4.3 ps at 1,550 nm is achieved.
- Boris Korzh
- , Qing-Yuan Zhao
- & Karl K. Berggren
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Article |
4H-silicon-carbide-on-insulator for integrated quantum and nonlinear photonics
Monolithic photonics devices based on SiC are fabricated by a wafer bonding and thinning technique. The strong enhancement of single-photon emission from a colour centre and optical frequency conversion with an efficiency of 360% W−1 are demonstrated.
- Daniil M. Lukin
- , Constantin Dory
- & Jelena Vučković
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Article |
An integrated broadband spectrometer on thin-film lithium niobate
By exploiting the electro-optic properties of thin-film lithium niobate, an integrated single-waveguide Fourier transform spectrometer with a footprint of <10 mm2 and an operational bandwidth of 500 nm in the near- and short-wavelength infrared is demonstrated.
- David Pohl
- , Marc Reig Escalé
- & Rachel Grange
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Letter |
THz-to-optical conversion in wireless communications using an ultra-broadband plasmonic modulator
A high-speed wireless THz communication link is seamlessly integrated into a fibre-optic network. The demonstration relies on an ultra-broadband modulator exploiting two-dimensionally localized gap plasmons for direct conversion of the THz signals to the optical domain.
- S. Ummethala
- , T. Harter
- & C. Koos
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Letter |
Spectrotemporal shaping of itinerant photons via distributed nanomechanics
Optomechanical coupling enables an on-chip frequency comb and optical time-lens for 70-fold optical pulse compression.
- Linran Fan
- , Chang-Ling Zou
- & Hong X. Tang
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Article |
Visible quantum dot light-emitting diodes with simultaneous high brightness and efficiency
Red, green and blue CdSe/ZnSe quantum dot light-emitting diodes combine efficient operation with high brightness.
- Huaibin Shen
- , Qiang Gao
- & Zhenyu Zhang
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Letter |
Electron–hole liquid in a van der Waals heterostructure photocell at room temperature
Photoexcited charge carriers are typically approximated as a gas, but now it is shown that electrons and holes can behave as a liquid in MoTe2 photocells.
- Trevor B. Arp
- , Dennis Pleskot
- & Nathaniel M. Gabor
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Letter |
Microwave plasmonic mixer in a transparent fibre–wireless link
A direct wireless-to-optical receiver in a transparent optical link is achieved, thanks to a subwavelength two-dimensionally localized gap-plasmon mixer encoding wireless information directly onto optical signals.
- Y. Salamin
- , B. Baeuerle
- & J. Leuthold
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Letter |
Nanophotonic optical gyroscope with reciprocal sensitivity enhancement
An integrated silicon photonic optical gyroscope achieves two orders of magnitude size reduction and a factor of thirty better phase-shift sensitivity using reciprocal sensitivity enhancement.
- Parham P. Khial
- , Alexander D. White
- & Ali Hajimiri
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Article |
Terahertz dynamics of electron–vibron coupling in single molecules with tunable electrostatic potential
Terahertz (THz) spectroscopy based on a single-molecule transistor detects a THz-induced centre-of-mass oscillation of a fullerene molecule. Its sensitivity is so high that the spectrum changes on adding (removing) an electron to (from) the molecule.
- Shaoqing Du
- , Kenji Yoshida
- & Kazuhiko Hirakawa
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Article |
Control of semiconductor emitter frequency by increasing polariton momenta
While modifications of emission and absorption rates are commonplace in photonics, similar manipulations of emitter transition frequencies are challenging. Here, 2D polaritons in graphene are predicted to enable non-vertical electronic transitions in a quantum well, controlling the transition frequencies by inducing an effective non-locality.
- Yaniv Kurman
- , Nicholas Rivera
- & Ido Kaminer
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Article |
Silicon Mie resonators for highly directional light emission from monolayer MoS2
Based on a modified Mie scattering theory, several pathways to achieve control over the directionality, polarization state and spectral emission that rely on a coherent coupling of an emitting dipole in monolayer MoS2 to optical resonances of a silicon nanowire are reported.
- Ahmet Fatih Cihan
- , Alberto G. Curto
- & Mark L. Brongersma
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Letter |
Far-field nanoscopy on a semiconductor quantum dot via a rapid-adiabatic-passage-based switch
A spatial resolution of 30 nm (=λ/31) exceeding the diffraction limit is achieved by super-resolution fluorescence microscopy. The nanoscopic imaging scheme can be applied to coherent quantum-mechanical systems such as quantum dots, as well as colour centres.
- Timo Kaldewey
- , Andreas V. Kuhlmann
- & Richard J. Warburton
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Article |
Wavefront shaping with disorder-engineered metasurfaces
Using designer-disordered metasurfaces, optical input–output characteristics, which are typically difficult to obtain, can be known a priori. The approach is used for wavefront shaping, high-numerical-aperture focusing and fluorescence imaging.
- Mooseok Jang
- , Yu Horie
- & Changhuei Yang
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Article |
Tandem luminescent solar concentrators based on engineered quantum dots
Multijunctions have long been used to enhance photovoltaic solar cell efficiency. Here, a large-area tandem luminescent solar concentrator is demonstrated using two types of quantum dot with low reabsorption.
- Kaifeng Wu
- , Hongbo Li
- & Victor I. Klimov
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Article |
Room-temperature ultrafast nonlinear spectroscopy of a single molecule
Frequency-resolved transient excited-state absorption of a single molecule is measured at room temperature. The dynamic Stokes shift and vibrational cooling are directly measured with 25 fs temporal resolution and a spectral detection bandwidth of hundreds of meV.
- Matz Liebel
- , Costanza Toninelli
- & Niek F. van Hulst
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Review Article |
Non-reciprocal photonics based on time modulation
The progress on non-reciprocal photonic devices enabled by temporal modulation is reviewed.
- Dimitrios L. Sounas
- & Andrea Alù
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Letter |
Ultrafast synthesis and switching of light polarization in nonlinear anisotropic metamaterials
Picosecond all-optical switching of the polarization of visible light is achieved by using the anisotropy and nonlinearity of a hyperbolic metamaterial.
- Luke H. Nicholls
- , Francisco J. Rodríguez-Fortuño
- & Anatoly V. Zayats
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Letter |
Highly efficient on-chip direct electronic–plasmonic transducers
Electronic–plasmonic transducers made from metal–insulator–metal junctions are demonstrated. The plasmon sources are coupled efficiently to plasmonic waveguides and could be used in integrated nanophotonic applications.
- Wei Du
- , Tao Wang
- & Christian A. Nijhuis
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Books & Arts |
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Letter |
Evanescent single-molecule biosensing with quantum-limited precision
An evanescent single-molecule biosensor that operates at the fundamental precision limit, allowing a four-order-of-magnitude reduction in optical intensity while maintaining state-of-the-art sensitivity, is demonstrated.
- N. P. Mauranyapin
- , L. S. Madsen
- & W. P. Bowen
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Letter |
Nanofibre optic force transducers with sub-piconewton resolution via near-field plasmon–dielectric interactions
A nanofibre optic force transducer with 0.2 pN sensitivity is demonstrated. The set-up is used to monitor bacterial motion, observe heart cell beating and detect infrasound power in solution.
- Qian Huang
- , Joon Lee
- & Donald J. Sirbuly
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Letter |
Imaging exciton–polariton transport in MoSe2 waveguides
Imaging reveals properties of exciton–polaritons in MoSe2 waveguides.
- F. Hu
- , Y. Luan
- & Z. Fei
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Letter |
Hybrid indium phosphide-on-silicon nanolaser diode
By exploiting one-dimensional photonic crystal nanocavities, an ultra-compact indium phosphide-on-silicon laser diode with low current threshold, high wall-plug efficiency and high integrability is demonstrated.
- Guillaume Crosnier
- , Dorian Sanchez
- & Fabrice Raineri
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Letter |
Integrated Cherenkov radiation emitter eliminating the electron velocity threshold
Researchers use hyperbolic metamaterials to make an integrated Cherenkov light source and relax the electron energy requirements. Radiation covering the visible range and near-infrared is achieved with electron energies of only 0.25–1.4 keV.
- Fang Liu
- , Long Xiao
- & Yidong Huang
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Article |
Single-photon imager based on a superconducting nanowire delay line
A superconducting nanowire acting as a single-photon detector and as a microwave delay line is used to demonstrate an imaging device at the single-photon level with sub-20-µm spatial resolution and 50-ps temporal resolution.
- Qing-Yuan Zhao
- , Di Zhu
- & Karl K. Berggren
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Letter |
Measurement of non-monotonic Casimir forces between silicon nanostructures
Previous demonstrations of the elusive Casimir force between interfaces exhibit monotonic dependence on surface displacement. Now a non-monotonic dependence of the force has been shown experimentally by exploting nanostructured surfaces.
- L. Tang
- , M. Wang
- & H. B. Chan
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Letter |
Demonstration of a self-pulsing photonic crystal Fano laser
Fano interference and nonlinearity are exploited to achieve self-pulsing of a laser at gigahertz frequencies.
- Yi Yu
- , Weiqi Xue
- & Jesper Mork
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Letter |
Spectral hole burning and its application in microwave photonics
Rabi oscillations with a decay time of 26.7 μs are observed in a system comprising the electron spins in a diamond nitrogen–vacancy centre and a superconducting microwave cavity. Such oscillations are achieved by engineering the spectral hole burning of the spin ensemble.
- Stefan Putz
- , Andreas Angerer
- & Johannes Majer
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Article |
High-magnification super-resolution FINCH microscopy using birefringent crystal lens interferometers
The use of birefringent crystals improves super-resolution Fresnel incoherent correlation holography (FINCH) microscopy.
- Nisan Siegel
- , Vladimir Lupashin
- & Gary Brooker
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Letter |
Real-space coherent manipulation of electrons in a single tunnel junction by single-cycle terahertz electric fields
Carrier-envelope-phase-controlled single-cycle terahertz pulses can induce coherent electron tunnelling either from a Pt/Ir nanotip to a graphite sample or vice versa. The pulses enable ultrafast nonlinear manipulation of electrons at the atomic scale.
- Katsumasa Yoshioka
- , Ikufumi Katayama
- & Jun Takeda
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Article |
Selective carrier injection into patterned arrays of pyramidal quantum dots for entangled photon light-emitting diodes
Polarization-entangled photons are generated from light-emitting diodes based on site-controlled pyramidal quantum dots. Selective current injection into the vicinity of a quantum dot becomes possible owing to a self-assembled vertical quantum wire.
- T. H. Chung
- , G. Juska
- & E. Pelucchi
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Letter |
Sub-cycle optical phase control of nanotunnelling in the single-electron regime
Carrier-envelope-phase control of the electronic current over a laterally confined tunnelling gap a few nanometres wide yields current densities above 50 MA cm–2 driven by picojoule-level optical pulses at room temperature.
- Tobias Rybka
- , Markus Ludwig
- & Alfred Leitenstorfer
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Article |
Optical observation of single atomic ions interacting with plasmonic nanorods in aqueous solution
Single zinc and mecury ions are optically detected in solution by detuning of metal nanorod resonators coupled to the whispering gallery mode of a dielectric cavity.
- Martin D. Baaske
- & Frank Vollmer
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Article |
Measuring subwavelength spatial coherence with plasmonic interferometry
Surface plasmon interferometry is used to measure the spatial coherence at subwavelength scales.
- Drew Morrill
- , Dongfang Li
- & Domenico Pacifici
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Books & Arts |
New titles at a glance
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Article |
Optical transduction and routing of microwave phonons in cavity-optomechanical circuits
Researchers demonstrate microwave phonon waveguide circuits and tunable delay and filter for microwave-photonics signals carried by 1,500 nm wavelength light.
- Kejie Fang
- , Matthew H. Matheny
- & Oskar Painter
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Article |
Efficient and low-noise single-photon-level frequency conversion interfaces using silicon nanophotonics
Ultralow-noise frequency conversion within the 980-nm band and between the 980-nm and 1,550-nm bands occurs through Bragg scattering in Si3N4 microring resonators. The maximum conversion efficiencies are 25% and 60%, respectively.
- Qing Li
- , Marcelo Davanço
- & Kartik Srinivasan
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Article |
Cavity-enhanced light emission from electrically driven carbon nanotubes
Carbon nanotubes in a nanocavity offer a route to narrow-linewidth on-chip light emitters.
- Felix Pyatkov
- , Valentin Fütterling
- & Wolfram H. P. Pernice
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Letter |
Real-space mapping of tailored sheet and edge plasmons in graphene nanoresonators
Researchers demonstrate graphene plasmon edge modes at infrared wavelengths. Such modes may offer additional electromagnetic field confinement compared with conventional sheet modes.
- A. Y. Nikitin
- , P. Alonso-González
- & R. Hillenbrand
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Article |
Near-optimal single-photon sources in the solid state
A single photon with near-unity indistinguishability is generated from quantum dots in electrically controlled cavity structures. The cavity allows for efficient photon collection while application of an electrical bias cancels charge noise effects.
- N. Somaschi
- , V. Giesz
- & P. Senellart
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Letter |
Self-homodyne measurement of a dynamic Mollow triplet in the solid state
Intrinsic Fano interference in a strongly coupled quantum dot/photonic crystal cavity system is controlled to remove most of the coherently scattered light. This result leads to the first experimental observation of the dynamic Mollow triplet.
- Kevin A. Fischer
- , Kai Müller
- & Jelena Vučković
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Article |
Modified optical absorption of molecules on metallic nanoparticles at sub-monolayer coverage
Direct measurements of silver spheres with sub-monolayer concentrations of dye-molecules reveal shifts and broadening of molecular resonances.
- Brendan L. Darby
- , Baptiste Auguié
- & Eric C. Le Ru
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Article |
On-chip zero-index metamaterials
Most metamaterial experiments occur in bulk transmission geometries. Here researchers demonstrate integrated in-plane zero-index metamaterials.
- Yang Li
- , Shota Kita
- & Eric Mazur
Deep learning for the design of photonic structures
Plasmonic microphone
Nanoscale heat