GSTDTAP  > 地球科学
DOI10.1126/science.aar7709
Exceptional points in optics and photonics
Miri, Mohammad-Ali1,2,3; Alu, Andrea1,3,4,5
2019-01-04
发表期刊SCIENCE
ISSN0036-8075
EISSN1095-9203
出版年2019
卷号363期号:6422页码:42-+
文章类型Review
语种英语
国家USA
英文摘要

Exceptional points are branch point singularities in the parameter space of a system at which two or more eigenvalues, and their corresponding eigenvectors, coalesce and become degenerate. Such peculiar degeneracies are distinct features of non-Hermitian systems, which do not obey conservation laws because they exchange energy with the surrounding environment. Non-Hermiticity has been of great interest in recent years, particularly in connection with the quantum mechanical notion of parity-time symmetry, after the realization that Hamiltonians satisfying this special symmetry can exhibit entirely real spectra. These concepts have become of particular interest in photonics because optical gain and loss can be integrated and controlled with high resolution in nanoscale structures, realizing an ideal playground for non-Hermitian physics, parity-time symmetry, and exceptional points. As we control dissipation and amplification in a nanophotonic system, the emergence of exceptional point singularities dramatically alters their overall response, leading to a range of exotic optical functionalities associated with abrupt phase transitions in the eigenvalue spectrum. These concepts enable ultrasensitive measurements, superior manipulation of the modal content of multimode lasers, and adiabatic control of topological energy transfer for mode and polarization conversion. Non-Hermitian degeneracies have also been exploited in exotic laser systems, new nonlinear optics schemes, and exotic scattering features in open systems. Here we review the opportunities offered by exceptional point physics in photonics, discuss recent developments in theoretical and experimental research based on photonic exceptional points, and examine future opportunities in this area from basic science to applied technology.


领域地球科学 ; 气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000455315800052
WOS关键词PARITY-TIME SYMMETRY ; MODE CONVERSION ; LASER ; STATES ; REAL ; DISPERSION ; ENERGIES ; SPECTRA ; PHYSICS ; WIDTHS
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/200438
专题地球科学
资源环境科学
气候变化
作者单位1.Univ Texas Austin, Dept Elect & Comp Engn, Austin, TX 78712 USA;
2.CUNY Queens Coll, Dept Phys, Flushing, NY 11367 USA;
3.CUNY, Grad Ctr, Phys Program, New York, NY 10016 USA;
4.CUNY, Adv Sci Res Ctr, Photon Initiat, New York, NY 10031 USA;
5.CUNY City Coll, Dept Elect Engn, New York, NY 10031 USA
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Miri, Mohammad-Ali,Alu, Andrea. Exceptional points in optics and photonics[J]. SCIENCE,2019,363(6422):42-+.
APA Miri, Mohammad-Ali,&Alu, Andrea.(2019).Exceptional points in optics and photonics.SCIENCE,363(6422),42-+.
MLA Miri, Mohammad-Ali,et al."Exceptional points in optics and photonics".SCIENCE 363.6422(2019):42-+.
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