Surface Transformation With Homogenous Optic-Null Medium

Sun, Fei; He, Sailing

doi:10.2528/pier15042805

Cited by 17 publications

(11 citation statements)

References 23 publications

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“…OST is a new theoretical design method derived from transformation optics [18,19] as a surface-tosurface correspondence method. Two surfaces linked by optic-null medium (ONM) are equivalent surfaces in OST [18].…”

Section: Theoretical Methodsmentioning

confidence: 99%

A Camouflage Device Without Metamaterials

Sun¹,

Zhang²,

Evans³

et al. 2019

PIER

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We propose a camouflage device that can greatly reduce scattering in the microwave frequency using only uniform copper plates with no internal structuring (no metamaterials). The camouflage device is designed by optical surface transformation (OST), which is derived from transformation optics but much simpler than transformation optics. The key of our design is to choose suitable arrangement and lengths of these copper plates that satisfy Fabry-Perot condition. The proposed camouflage device can work when the detecting wave comes from a wide-angle range (not only works for some discrete angles). The proposed method will give a new and simple way to design and realize camouflage device.

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Section: Theoretical Methodsmentioning

confidence: 99%

A Camouflage Device Without Metamaterials

Sun¹,

Zhang²,

Evans³

et al. 2019

PIER

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“…The optic-null medium (ONM) is a homogenous block of highly anisotropic medium designed by the extremely stretching spatial transformation 18 19 20 21 22 23 24 25 26 27 . The ONM has been applied in many different applications, e.g.…”

Section: The Optic-null Medium (Onm)mentioning

confidence: 99%

“…an optical hyper-lens 18 23 24 , DC magnetic hose 25 , concentrators 26 . We also introduced the idea of further transformations inside an ONM to reduce the material requirement of devices designed by TO 20 27 , and extended the theory of TO to the optical surface transformation (OST) by the ONM 21 22 . The ONM has been experimentally demonstrated by metamaterials at microwave frequencies 18 19 23 .…”

Section: The Optic-null Medium (Onm)mentioning

confidence: 99%

Overlapping illusions by transformation optics without any negative refraction material

Sun

2016

Sci Rep

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A novel method to achieve an overlapping illusion without any negative refraction index material is introduced with the help of the optic-null medium (ONM) designed by an extremely stretching spatial transformation. Unlike the previous methods to achieve such an optical illusion by transformation optics (TO), our method can achieve a power combination and reshape the radiation pattern at the same time. Unlike the overlapping illusion with some negative refraction index material, our method is not sensitive to the loss of the materials. Other advantages over existing methods are discussed. Numerical simulations are given to verify the performance of the proposed devices.

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“…The basic idea of a novel method for designing optical devices, namely the optical surface transformation (OST), is proposed in a short report 15 , and a detailed theory has been given later 16 . In this paper we use the OST to design a novel zero-order optical resonator that has the following features.…”

mentioning

confidence: 99%

Creating a zero-order resonator using an optical surface transformation

Sun

2016

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A novel zero-order resonator has been designed by an optical surface transformation (OST) method. The resonator proposed here has many novel features. Firstly, the mode volume can be very small (e.g. in the subwavelength scale). Secondly, the resonator is open (no reflecting walls are utilized) and resonant effects can be found in a continuous spectrum (i.e. a continuum of eigenmodes). Thirdly, we only need one homogenous medium to realize the proposed resonator. The shape of the resonator can be a ring structure of arbitrary shape. In addition to the natural applications (e.g. optical storage) of an optical resonator, we also suggest some other applications of our novel optical open resonator (e.g. power combination, squeezing electromagnetic energy in the free space).

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Surface Transformation With Homogenous Optic-Null Medium

Cited by 17 publications

References 23 publications

A Camouflage Device Without Metamaterials

A Camouflage Device Without Metamaterials

Overlapping illusions by transformation optics without any negative refraction material

Creating a zero-order resonator using an optical surface transformation

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