Comment

Filter By:

Article Type
  • A heat-powered emitter can sometimes exceed the Planck thermal-emission limit. We clarify when such super-Planckian emission is possible, arguing that far-field super-Planckian emission requires a distribution of energy that is not consistent with a unique temperature, and therefore the process should not be called ‘thermal emission’.

    • Yuzhe Xiao
    • Matthew Sheldon
    • Mikhail A. Kats
    Comment
  • The field of flat lens research brings innovative nanophotonic design concepts to the world of macro-optics. However, when evaluating the performance of these lenses a lack of consistency prevents proper comparison of competing technologies. This problem can be solved by using methods developed in industry for conventional lenses.

    • Jacob Engelberg
    • Uriel Levy
    Comment
  • Low stability of perovskite light-emitting diodes (PeLEDs) is the biggest obstacle to the commercialization of PeLED displays. Here, we cover the current status and challenges in analysing and improving the stability of PeLEDs and suggest some advice that will benefit the community to boost the operational lifetime of PeLEDs.

    • Seung-Je Woo
    • Joo Sung Kim
    • Tae-Woo Lee
    Comment
  • Jonathan P. Dowling, who died in June, was a pioneer in quantum optics and one of the founders of the US government’s research programme in quantum information.

    • James Franson
    • Mark M. Wilde
    Comment
  • Unidirectional and topological surface plasmon polaritons are currently attracting substantial interest and intense debate. Realistic material models and energy conservation considerations are essential to correctly understand extreme wave effects in non-reciprocal plasmonics, and to assess their potential for novel devices.

    • Francesco Monticone
    Comment
  • Philip Warren Anderson is one of the founding fathers of modern condensed-matter physics. With his death on 29 March 2020, we have lost one of the most influential physicists of the twentieth century.

    • Diederik S. Wiersma
    • Bart A. van Tiggelen
    • Ad Lagendijk
    Comment
  • The arrival of light-emitting diodes based on new materials is posing challenges for the characterization and comparison of devices in a trusted and consistent manner. Here we provide some advice and guidelines that we hope will benefit the community.

    • Miguel Anaya
    • Barry P. Rand
    • Samuel D. Stranks
    Comment
  • Evgeny Dianov (1936–2019) was a pioneer of fibre-optics research in the former Soviet Union and director of a highly successful research centre in Moscow dedicated to the field.

    • Anatoly Grudinin
    • Peter Kazansky
    • David Payne
    Comment
  • Father of the semiconductor laser, Nobel Prize laureate and director of the Ioffe Institute in St Petersburg, Zhores Alferov was a much-loved scientist and educator whose research changed the modern world.

    • Sergey Ivanov
    Comment
  • Yaron Silberberg of the Weizmann Institute in Israel passed away in April. Here, some of his former students and friends remind us of who Yaron was: a creative researcher and a mentor without ego with major achievements in nonlinear optics, microscopy and quantum physics.

    • Dan Oron
    • Nirit Dudovich
    • Mordechai (Moti) Segev
    Comment
  • The Shockley–Queisser model is a landmark in photovoltaic device analysis by defining an ideal situation as reference for actual solar cells. However, the model and its implications are easily misunderstood. Thus, we present a guide to help understand and to avoid misinterpreting it.

    • Jean-Francois Guillemoles
    • Thomas Kirchartz
    • Uwe Rau
    Comment
  • As a pioneer in the research on ultra-high-quality dielectric microresonators and their applications in nonlinear optics, frequency metrology and laser science, Mikhail Gorodetsky is badly missed.

    • Igor Bilenko
    • Vladimir Ilchenko
    • Tobias J. Kippenberg
    Comment
  • As the most abundant biopolymer on Earth since it can be found in every plant cell wall, cellulose has emerged as an ideal candidate for the development of renewable and biodegradable photonic materials, substituting conventional pigments.

    • Bruno Frka-Petesic
    • Silvia Vignolini
    Comment
  • The 2005 Nobel laureate, Roy Jay Glauber, sadly passed away on 26 December 2018 at the age of 93. He was highly regarded for his work on the quantum theory of coherence, as well as for his contributions to nuclear physics, scattering theory and statistical mechanics.

    • Fritz Haake
    • Maciej Lewenstein
    Comment
  • Victor Georgievich Veselago (1929–2018), a Russian scientist from the Lebedev Physical Institute in Moscow, provided great inspiration and impetus to the field of metamaterials with his theoretical analysis of materials with a negative index of refraction.

    • Nikolay I. Zheludev
    Comment
  • Osamu Shimomura’s 90-year life came to an end on 19 October 2018. Throughout his long and exceedingly fruitful career, the Japanese marine biologist and chemist passionately explored the phenomenon of bioluminescence in living organisms, earning a Nobel Prize in the process.

    • Yasushi Hiraoka
    Comment
  • The performance of photodetectors fabricated from emerging semiconductors such as perovskites, quantum dots, two-dimensional materials or organics, for example, can be prone to misinterpretation. This Comment exposes the problems and proposes some guidelines for accurate characterization.

    • Yanjun Fang
    • Ardalan Armin
    • Jinsong Huang
    Comment
  • Optical fibre technology transformed telecommunications, leading to the global broadband Internet, and beyond. Charles Kuen Kao is the father of optical fibre communications whose vision changed the world.

    • Chinlon Lin
    Comment
  • Emil Wolf died in June 2018 at the age of 95. The father of optical coherence theory was at the University of Rochester for nearly 60 years. A memorial in August at the university attracted more than 150 attendees from around the world.

    • P. Scott Carney
    • Joseph Eberly
    Comment
  • Innovations in ‘sustainable’ photonics technologies such as free-space optical links and solar-powered equipment provide developing countries with new cost-effective opportunities for deploying future-proof telecommunication networks.

    • Martin P. J. Lavery
    • Mojtaba Mansour Abadi
    • Andrew Forbes
    Comment