Matches in SemOpenAlex for { <https://semopenalex.org/work/W2803275049> ?p ?o ?g. }
- W2803275049 endingPage "063001" @default.
- W2803275049 startingPage "063001" @default.
- W2803275049 abstract "Transformation optics asks, using Maxwell's equations, what kind of electromagnetic medium recreates some smooth deformation of space? The guiding principle is Einstein's principle of covariance: that any physical theory must take the same form in any coordinate system. This requirement fixes very precisely the required electromagnetic medium. The impact of this insight cannot be overestimated. Many practitioners were used to thinking that only a few analytic solutions to Maxwell's equations existed, such as the monochromatic plane wave in a homogeneous, isotropic medium. At a stroke, transformation optics increases that landscape from 'few' to 'infinity', and to each of the infinitude of analytic solutions dreamt up by the researcher, there corresponds an electromagnetic medium capable of reproducing that solution precisely. The most striking example is the electromagnetic cloak, thought to be an unreachable dream of science fiction writers, but realised in the laboratory a few months after the papers proposing the possibility were published. But the practical challenges are considerable, requiring meta-media that are at once electrically and magnetically inhomogeneous and anisotropic. How far have we come since the first demonstrations over a decade ago? And what does the future hold? If the wizardry of perfect macroscopic optical invisibility still eludes us in practice, then what compromises still enable us to create interesting, useful, devices? While three-dimensional (3D) cloaking remains a significant technical challenge, much progress has been made in two dimensions. Carpet cloaking, wherein an object is hidden under a surface that appears optically flat, relaxes the constraints of extreme electromagnetic parameters. Surface wave cloaking guides sub-wavelength surface waves, making uneven surfaces appear flat. Two dimensions is also the setting in which conformal and complex coordinate transformations are realisable, and the possibilities in this restricted domain do not appear to have been exhausted yet. Beyond cloaking, the enhanced electromagnetic landscape provided by transformation optics has shown how fully analytic solutions can be found to a number of physical scenarios such as plasmonic systems used in electron energy loss spectroscopy and cathodoluminescence. Are there further fields to be enriched? A new twist to transformation optics was the extension to the spacetime domain. By applying transformations to spacetime, rather than just space, it was shown that events rather than objects could be hidden from view; transformation optics had provided a means of effectively redacting events from history. The hype quickly settled into serious nonlinear optical experiments that demonstrated the soundness of the idea, and it is now possible to consider the practical implications, particularly in optical signal processing, of having an 'interrupt-without-interrupt' facility that the so-called temporal cloak provides. Inevitable issues of dispersion in actual systems have only begun to be addressed. Now that time is included in the programme of transformation optics, it is natural to ask what role ideas from general relativity can play in shaping the future of transformation optics. Indeed, one of the earliest papers on transformation optics was provocatively titled 'General Relativity in Electrical Engineering'. The answer that curvature does not enter directly into transformation optics merely encourages us to speculate on the role of transformation optics in defining laboratory analogues. Quite why Maxwell's theory defines a 'perfect' transformation theory, while other areas of physics such as acoustics are not apparently quite so amenable, is a deep question whose precise, mathematical answer will help inform us of the extent to which similar ideas can be extended to other fields. The contributors to this Roadmap, who are all renowned practitioners or inventors of transformation optics, will give their perspectives into the field's status and future development." @default.
- W2803275049 created "2018-06-01" @default.
- W2803275049 creator A5001631494 @default.
- W2803275049 creator A5004105482 @default.
- W2803275049 creator A5005438233 @default.
- W2803275049 creator A5005842047 @default.
- W2803275049 creator A5006021387 @default.
- W2803275049 creator A5011614810 @default.
- W2803275049 creator A5013779195 @default.
- W2803275049 creator A5014146942 @default.
- W2803275049 creator A5015648832 @default.
- W2803275049 creator A5015666031 @default.
- W2803275049 creator A5019800182 @default.
- W2803275049 creator A5021173499 @default.
- W2803275049 creator A5028107504 @default.
- W2803275049 creator A5029270983 @default.
- W2803275049 creator A5030764233 @default.
- W2803275049 creator A5042446955 @default.
- W2803275049 creator A5049169851 @default.
- W2803275049 creator A5052409233 @default.
- W2803275049 creator A5059144069 @default.
- W2803275049 creator A5066039742 @default.
- W2803275049 creator A5067495072 @default.
- W2803275049 creator A5070115615 @default.
- W2803275049 creator A5072680811 @default.
- W2803275049 creator A5076219122 @default.
- W2803275049 creator A5078625839 @default.
- W2803275049 creator A5081018181 @default.
- W2803275049 creator A5085040467 @default.
- W2803275049 date "2018-05-22" @default.
- W2803275049 modified "2023-10-17" @default.
- W2803275049 title "Roadmap on transformation optics" @default.
- W2803275049 cites W1429299901 @default.
- W2803275049 cites W1531935167 @default.
- W2803275049 cites W1560642904 @default.
- W2803275049 cites W1957928970 @default.
- W2803275049 cites W1964548562 @default.
- W2803275049 cites W1964929587 @default.
- W2803275049 cites W1966038150 @default.
- W2803275049 cites W1967995830 @default.
- W2803275049 cites W1977356384 @default.
- W2803275049 cites W1978127336 @default.
- W2803275049 cites W1978446077 @default.
- W2803275049 cites W1979072661 @default.
- W2803275049 cites W1980452551 @default.
- W2803275049 cites W1981289394 @default.
- W2803275049 cites W1986611473 @default.
- W2803275049 cites W1992865536 @default.
- W2803275049 cites W1994751539 @default.
- W2803275049 cites W1995796806 @default.
- W2803275049 cites W1999303985 @default.
- W2803275049 cites W1999424076 @default.
- W2803275049 cites W2000611965 @default.
- W2803275049 cites W2004428727 @default.
- W2803275049 cites W2008279176 @default.
- W2803275049 cites W2012824697 @default.
- W2803275049 cites W2013818669 @default.
- W2803275049 cites W2014094736 @default.
- W2803275049 cites W2015612433 @default.
- W2803275049 cites W2017538045 @default.
- W2803275049 cites W2019710617 @default.
- W2803275049 cites W2020249427 @default.
- W2803275049 cites W2020659054 @default.
- W2803275049 cites W2020844321 @default.
- W2803275049 cites W2021992998 @default.
- W2803275049 cites W2025987764 @default.
- W2803275049 cites W2029339422 @default.
- W2803275049 cites W2030276180 @default.
- W2803275049 cites W2032970802 @default.
- W2803275049 cites W2033036862 @default.
- W2803275049 cites W2035261499 @default.
- W2803275049 cites W2036317156 @default.
- W2803275049 cites W2040688766 @default.
- W2803275049 cites W2041613904 @default.
- W2803275049 cites W2042800784 @default.
- W2803275049 cites W2044463831 @default.
- W2803275049 cites W2047741066 @default.
- W2803275049 cites W2047773208 @default.
- W2803275049 cites W2051519670 @default.
- W2803275049 cites W2052723426 @default.
- W2803275049 cites W2053175946 @default.
- W2803275049 cites W2053710746 @default.
- W2803275049 cites W2054428507 @default.
- W2803275049 cites W2056215495 @default.
- W2803275049 cites W2057162203 @default.
- W2803275049 cites W2057284511 @default.
- W2803275049 cites W2059564821 @default.
- W2803275049 cites W2065335721 @default.
- W2803275049 cites W2066380492 @default.
- W2803275049 cites W2066929752 @default.
- W2803275049 cites W2070803685 @default.
- W2803275049 cites W2070999301 @default.
- W2803275049 cites W2076601469 @default.
- W2803275049 cites W2077151136 @default.
- W2803275049 cites W2078996139 @default.
- W2803275049 cites W2079078343 @default.
- W2803275049 cites W2079158863 @default.
- W2803275049 cites W2084259909 @default.