Riccardo Sapienza

Author(s): Michael J. A. Smith and Parry Y. Chen

We theoretically show that the frequency and momentum of a photon are not necessarily proportional to one another at low frequencies in photonic crystals comprising materials with positive- and negative-valued material properties. We rigorously determine closed-form conditions for the light cone to ...

[Phys. Rev. Lett. 121, 103902] Published Thu Sep 06, 2018

Superradiant emission from colour centres in diamond

Superradiant emission from colour centres in diamond, Published online: 03 September 2018; doi:10.1038/s41567-018-0269-7

Superradiance is reported from an ensemble of nitrogen–vacancy centres coupled to a microwave resonator in the fast cavity limit.

American Journal of Physics, Volume 86, Issue 9, Page 663-669, September 2018.

American Journal of Physics, Volume 86, Issue 9, Page 701-708, September 2018.

Author(s): K. Goswami, C. Giarmatzi, M. Kewming, F. Costa, C. Branciard, J. Romero, and A. G. White

A photonic quantum switch between a pair of operations is constructed such that the causal order of operations cannot be distinguished, even in principle.

[Phys. Rev. Lett. 121, 090503] Published Fri Aug 31, 2018

Author(s): Jihong Ma, Di Zhou, Kai Sun, Xiaoming Mao, and Stefano Gonella

Although topological mechanical metamaterials have been extensively studied from a theoretical perspective, their experimental characterization has been lagging. To address this shortcoming, we present a systematic, laser-assisted experimental characterization of topological kagome lattices, aimed a...

[Phys. Rev. Lett. 121, 094301] Published Tue Aug 28, 2018

Author(s): S. Ali Hassani Gangaraj and Francesco Monticone

Electromagnetic waves propagating in conventional wave-guiding structures are reflected by discontinuities and decay in lossy regions. In this Letter, we drastically modify this typical guided-wave behavior by combining concepts from non-Hermitian physics and topological photonics. To this aim, we t...

[Phys. Rev. Lett. 121, 093901] Published Tue Aug 28, 2018

Lorenzo Pattelli, Amos Egel, Uli Lemmer, Diederik S. Wiersma
Discrete random media have been investigated extensively over the past century due to their ability to scatter light. Even so, the link between the three-dimensional (3D) spatial distribution of the scattering elements and the resulting opacity is still lively debated to date due to different ... [Optica 5, 1037-1045 (2018)]

Nanoplasmonic optical antennas for life sciences and medicine

Nanoplasmonic optical antennas for life sciences and medicine, Published online: 19 July 2018; doi:10.1038/s41578-018-0033-8

Nanoplasmonics have emerged as a promising technology for applications in life sciences and medicine. In this Review, we discuss the application of nanoplasmonic optical antennas for in vivo intracellular exploration, photonic gene delivery and regulation, and in vitro molecular diagnostics.

M. F. Picardi, K. Y. Bliokh, F. J. Rodríguez-Fortuño, F. Alpeggiani, F. Nori
Spin and orbital angular momenta (AM) of light are well studied for free-space electromagnetic fields, even nonparaxial. One of the important applications of these concepts is the information transfer using AM modes, often via optical fibers and other guiding systems. However, the self-consistent ... [Optica 5, 1016-1026 (2018)]

Author(s): L. Jin and Z. Song

We propose an incident direction independent wave propagation generated by properly assembling different unidirectional destructive interferences (UDIs), which is a consequence of the appropriate match between synthetic magnetic fluxes and the incident wave vector. Single-direction lasing at spectra...

[Phys. Rev. Lett. 121, 073901] Published Wed Aug 15, 2018

Photography optics in the time dimension

Photography optics in the time dimension, Published online: 13 August 2018; doi:10.1038/s41566-018-0234-0

By folding large spaces in time using an off-resonant Fabry–Pérot cavity in camera sensors, new capabilities such as ultrafast multi-zoom imaging and ultrafast multispectral imaging, of use for time-resolved imaging and depth-sensing optics, are found.

Author(s): D. E. Chang, J. S. Douglas, A. González-Tudela, C.-L. Hung, and H. J. Kimble

Quantum optics has advanced tremendously over the past two decades by combining ultracold atoms with diverse optical systems. However, fundamental and technical issues place constraints that limit further advances. This Colloquium examines new paradigms for strong quantum interactions of matter and light by way of atoms and photons in nanoscopic dielectric lattices, including novel quantum phases of atoms, photons, and phonons.

[Rev. Mod. Phys. 90, 031002] Published Wed Aug 01, 2018

Navid Borhani, Eirini Kakkava, Christophe Moser, Demetri Psaltis
Deep neural networks (DNNs) are used to classify and reconstruct the input images from the intensity of the speckle patterns that result after the inputs are propagated through multimode fiber (MMF). We were able to demonstrate this result for fibers up to 1 km long by training the DNNs with ... [Optica 5, 960-966 (2018)]

Author(s): Mikołaj K. Schmidt, L. G. Helt, Christopher G. Poulton, and M. J. Steel

A mechanical analogue to the Purcell effect is proposed, for which elastic radiation from a localized emitter is modified by generic resonant microantennas.

[Phys. Rev. Lett. 121, 064301] Published Wed Aug 08, 2018

Behnam Abaie, Mostafa Peysokhan, Jian Zhao, Jose E. Antonio-Lopez, Rodrigo Amezcua-Correa, Axel Schülzgen, Arash Mafi
High-quality coherent wavefronts are extremely useful in optical communications and lasers. Disorder is usually considered as a source of noise and deviation from ideal designs for generating high-quality beams in photonic devices. Here, we demonstrate that strong disorder can be exploited to ... [Optica 5, 984-987 (2018)]

Author(s): Philipp del Hougne, Mohammadreza F. Imani, Mathias Fink, David R. Smith, and Geoffroy Lerosey

Complicated multipath trajectories of waves in disordered cavities cause object localization to be very challenging with traditional ray-tracing approaches. Yet it is known that information about the object position is encoded in the Green’s function. After a calibration step, traditional time-rever...

[Phys. Rev. Lett. 121, 063901] Published Mon Aug 06, 2018

Author(s): G. Li, A. S. Sheremet, R. Ge, T. C. H. Liew, and A. V. Kavokin

We propose using the effective spin-orbit coupling of light in Bragg-modulated cylindrical waveguides for the efficient separation of spin-up and spin-down photons emitted by a single photon emitter. Because of the spin and directional dependence of photonic stop bands in the waveguides, spin-up (-d...

[Phys. Rev. Lett. 121, 053901] Published Thu Aug 02, 2018

Tyler W. Hughes, Momchil Minkov, Yu Shi, Shanhui Fan
Recently, integrated optics has gained interest as a hardware platform for implementing machine learning algorithms. Of particular interest are artificial neural networks, since matrix-vector multiplications, which are used heavily in artificial neural networks, can be done efficiently in photonic ... [Optica 5, 864-871 (2018)]

Author(s): J. Enrique Vázquez-Lozano and Alejandro Martínez

A new general expression for the optical chirality density in lossless and lossy dispersive media is applicable to many material systems including among others dielectrics, plasmonic nanostructures, and left-handed metamaterials.

[Phys. Rev. Lett. 121, 043901] Published Tue Jul 24, 2018

Author(s): Daniel Huber, Marcus Reindl, Saimon Filipe Covre da Silva, Christian Schimpf, Javier Martín-Sánchez, Huiying Huang, Giovanni Piredda, Johannes Edlinger, Armando Rastelli, and Rinaldo Trotta

Quantum dots that emit entangled photon pairs on demand could be used in quantum communication networks.

[Phys. Rev. Lett. 121, 033902] Published Wed Jul 18, 2018

Author(s): H. J. Snijders, J. A. Frey, J. Norman, H. Flayac, V. Savona, A. C. Gossard, J. E. Bowers, M. P. van Exter, D. Bouwmeester, and W. Löffler

Two separate groups have demonstrated a photon blockade effect that could be used to make practical single-photon emitters.

[Phys. Rev. Lett. 121, 043601] Published Mon Jul 23, 2018

Author(s): Chuandeng Hu, Zhenyu Li, Rui Tong, Xiaoxiao Wu, Zengzilu Xia, Li Wang, Shanshan Li, Yingzhou Huang, Shuxia Wang, Bo Hou, C. T. Chan, and Weijia Wen

Topological characteristics of energy bands, such as Dirac and Weyl nodes, have attracted substantial interest in condensed matter systems as well as in classical wave systems. Among these energy bands, the type-II Dirac point is a nodal degeneracy with tilted conical dispersion, leading to a peculi...

[Phys. Rev. Lett. 121, 024301] Published Tue Jul 10, 2018

Author(s): Gabriel Schnoering, Lisa V. Poulikakos, Yoseline Rosales-Cabara, Antoine Canaguier-Durand, David J. Norris, and Cyriaque Genet

We optically trap freestanding single metallic chiral nanoparticles using a standing-wave optical tweezer. We also incorporate within the trap a polarimetric setup that allows us to perform in situ chiral recognition of single enantiomers. This is done by measuring the S3 component of the Stokes vec...

[Phys. Rev. Lett. 121, 023902] Published Tue Jul 10, 2018