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Perovskite materials have become very promising candidates for a new generation of potentially printable and efficient optoelectronic devices. Photovoltaic devices based on hybrid perovskites now achieve more than 20% photoconversion efficiency, and applications in solid-state lighting, photodetection and lasing are soaring. Their optoelectronic and photophysical properties are under intense scrutiny.
This web-collection brings together a selection of multi-disciplinary research and comments published in the Nature journals that explores the basic properties of halide-based perovskite materials and their potential for application in optoelectronics, from solar cells to lasers. It serves to illustrate the road to easily processable and efficient devices by presenting both historical milestones and the crucial landmark studies published in the last 12 months in the Nature journals.
A collection of obituaries published in Nature Photonics of exceptional scientists in photonics including Nobel Prize winners and others whose studies greatly inspired and impacted the optics community.
Popularization of super-resolution imaging techniques has allowed cell biologists to probe cell structure and function in previously unattainable detail. These methodologies continue to evolve, with new improvements that allow tailoring the available techniques to a particular need and application. This collection showcases primary research articles, reviews and protocols and highlights these recent developments by exemplifying the new, interesting applications of super-resolution microscopy as well as related tool development.
The exploration of photonic systems embracing the concepts of PT symmetry, topology and non-reciprocity has become highly active in recent years. Studies on these topics are not only providing rich scientific insight in terms of new physics but also potentially have important long-term technological implications, including the development of on-chip optical systems that support states of light that are immune to back scatter, are robust against perturbation and feature guaranteed unidirectional transmission.
Image: Jessica Brassard, Michigan Technological University
The development of atomically thin layers of van der Waals bonded solids with interesting optoelectronic properties has opened up new possibilities for exploring 2D physics and designing miniature photonic devices such as optical modulators, light emitters and saturable absorbers.
The ability to induce coupling between the spin angular momenta and orbital angular momenta of photons is creating new opportunities for preparing unique states of light and performing new forms of optical manipulation. This focus describes the theory and mechanisms behind the coupling and a discussion of the potential applications.
2015 marks the 150th anniversary of the formulation of Maxwell's equations which lie at the heart of our understanding of electromagnetism and the behaviour of light waves. This focus brings together a collection of articles charting the development, impact and modern day use of Maxwell's equations.
While power generation using silicon solar panels has steadily been increasing over the years, alternative materials that could compete with this technology in terms of efficiency and module costs are intensely being investigated. Yet, to allow for a fair assessment of new photovoltaic technologies, characterization of light-conversion performance should be conducted according to commonly agreed basic rules. This joint web focus collects a series of opinion pieces, recently published in Nature Materials,Nature NanotechnologyandNature Photonics, that discuss the importance of reporting accurate device performance.
The creation of photonic materials, circuitry, devices and probes that act on the nanoscale is yielding new opportunities for controlling light in the sub-wavelength regime. The result could be higher density information storage and processing, and improved sensing and imaging capabilities.
Attosecond photonics, currently one of the most promising branches of modern photonics, is progressing at an extremely rapid pace. Although still in its infancy, it has already captured the imagination of the scientific community with its promise of enhancing our understanding of ultrafast phenomena of direct relevance to life, technology and potentially medicine.
The 2014 Nobel Prize in Chemistry was awarded for the development of superresolution fluorescence microscopy, which enables the imaging of fine biological structures previously thought to be unresolvable using light. This collection of news pieces and articles by the Nobel laureates and their collaborators celebrates this achievement.
Thanks to recent developments, lasers based on fibre media with gain are simple, reliable and cost effective. Topics covered in this focus include high-power sources, ultrafast fibre lasers, industry's perspective on the developments in the field over the past decade, applications such as biomedical imaging, and nanotube- and graphene–based saturable absorbers for fibre lasers