Giant Goos-Hänchen shift using<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi mathvariant="script">PT</mml:mi></mml:math>symmetry

Ziauddin, .; Chuang, You-Lin; Lee, Ray-Kuang

doi:10.1103/physreva.92.013815

Cited by 38 publications

(19 citation statements)

References 42 publications

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“…Earlier, the PT -symmetry phenomenon has been noted in waveguides by considering gain and loss [21][22][23][24]. The study of PT -symmetry has led to many interesting designs of PT -synthetic materials such as unidirectional reflection-less wave propagation [25][26][27], a coherent perfect absorber [28,29], giant wave amplification [30], and giant Goos-Hänchen shift [31]. The experimental study of PT -symmetry has also led to revelations in plasmonics [32], synthetic lattices [33], and LRC circuits [34].…”

Section: Introductionmentioning

confidence: 99%

Tunable Fano resonances via optomechanical effect and gain–loss ratio in coupled microresonators

Ziauddin¹,

Jamil²,

Chaung³

et al. 2018

Laser Phys.

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We propose a system consisting of two coupled optical whispering-gallery-mode (WGM) microresonators to investigate the Fano resonances of the output probe field. The WGM microresonators are driven coherently by a strong pump field and a weak probe field via tapered fibers (Peng et al 2014 Nat. Phys. 10 394). By making one of the resonators optomechanical and properly adjusting the coupling strength between the microresonators, we tune the Fano line shapes by varying the optomechanical strength. It is found that Fano line shapes appear on introducing optomechanical effects into the system. Interestingly enough, the gain-loss ratio in the proposed system has a key role in tuning a single Fano line shape to double. For the PT -symmetric phase, we investigate a more prominent double Fano line shape. The adjustment from single Fano line shape to double via the gain-loss ratio is the major part of this work. Our results can be used for all-optical switching and high-sensitivity sensing.

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Section: Introductionmentioning

confidence: 99%

Tunable Fano resonances via optomechanical effect and gain–loss ratio in coupled microresonators

Ziauddin¹,

Jamil²,

Chaung³

et al. 2018

Laser Phys.

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“…On the contrary, in PT-symmetric crystals the GHS can be huge inside the reflection band [43,44]. The following bi-periodic structures are also of potential interest: photonic-magnonic crystals (PMCs) which provide PBGs in spectra of electromagnetic waves and magnonic band gaps in spin waves spectra [45][46][47], and photonic hypercrystals [48].…”

Section: Introductionmentioning

confidence: 99%

“…The GHS at the PBG edges can reach values up to several hundreds of wavelengths [41]. Similarly, when a light beam is incident on a PC containing a defect layer, the GHSs are greatly enhanced near the defect mode due to the electromagnetic waves localization [42].On the contrary, in PT-symmetric crystals the GHS can be huge inside the reflection band [43,44]. The following bi-periodic structures are also of potential interest: photonic-magnonic crystals (PMCs) which provide PBGs in spectra of electromagnetic waves and magnonic band gaps in spin waves spectra [45][46][47], and photonic hypercrystals [48].In this paper, we investigate GHS of light in one-dimensional bi-periodic PMCs.…”

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confidence: 99%

Goos-Hänchen effect in light transmission through biperiodic photonic-magnonic crystals

et al. 2017

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We present a theoretical investigation of Goos-Hänchen effect, i.e. the lateral shift of the light beam transmitted through one-dimensional bi-periodic multilayered photonic systems consisting of equidistant magnetic layers separated by finite size dielectric photonic crystals. We show that the increase of the number of periods in the photonicmagnonic structure leads to increase of the Goos-Hänchen shift in the vicinity of the frequencies of defect modes located inside the photonic band gaps. Presence of the linear magneto-electric coupling in the magnetic layers can result in a vanishing of the positive maxima of the cross-polarized contribution to the Goos-Hänchen shift.PACS number(s): 42.25. Gy, 42.25.Bs, 42.70.Qs I. INTRODUCTIONThe Goos-Hänchen effect consists in the lateral shift of a reflected light beam with respect to the prediction of geometric optics [1]. Nowadays, this effect is intensively studied [2][3][4][5][6][7] in different systems, including anisotropic crystals and magnetic materials [8][9][10][11][12][13][14][15][16], graphene [4,[17][18][19], superconductors [20,21], and photonic crystals (PCs) [19][20][21][22] despite the long history of investigations since the first observation of this phenomenon in 1947 [1]. Some aspects of Goos-Hänchen effect were studied in different structures (see for example recent review papers [23,24]). The Goos-Hänchen shift (GHS) of partially coherent light in epsilon-near-zero metamaterials was theoretically investigated in [25]. Giant GHS (up to 70 wavelenghts) and angular shift of several hundred microradians were observed in 2D metasurfaces composed of PMMA gratings on a gold surface [26]. Giant GHS has been predicted also for spin waves in magnetic films [27][28][29][30], and optical phonons [31]. This phenomenon has potential application in designing of integrated optics devices, such as optical switchers, bio-and chemical sensors and detectors [32][33][34][35][36].The GHS in multilayered systems can exhibit interesting peculiarities. For instance, giant GHSs are experimentally demonstrated from a prism-coupled PC structure through a bandgap-enhanced total internal reflection [37]. All-optical tunability of the GHS in PCs was demonstrated in [38]. The lateral shift of the reflected beam can be remarkably enhanced when the phase matching conditions are satisfied for the surface polaritons excitation at the interface of the structure in the graphene-induced photonic band gap (PBG) [39]. The GHS reversibility near the band-crossing structure of PCs containing lefthanded metamaterials was shown in [40]. The GHS at the PBG edges can reach values up to several hundreds of wavelengths [41]. Similarly, when a light beam is incident on a PC containing a defect layer, the GHSs are greatly enhanced near the defect mode due to the electromagnetic waves localization [42].On the contrary, in PT-symmetric crystals the GHS can be huge inside the reflection band [43,44]. The following bi-periodic structures are also of potential interest: photonic-magnonic crystals (PMCs) w...

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“…In this article, we adopt the three-layer system [28,[39][40][41] com posed o f tw o cavity w alls and an intracavity atom ic m edium w hich can be m odeled as the four-level double-A configuration. Based on w hether the w avelength o f the reflected light is identical to that o f the incident field or not, we divide the GH shift that could appear in such a system into two categories, the linear shift and the nonlinear shift.…”

Section: Introductionmentioning

confidence: 99%

Goos-Hänchen shift in a standing-wave-coupled electromagnetically-induced-transparency medium

et al. 2015

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The Goos-Hiinchen shift of the system composed by two cavity walls and an intracavity atomic sample is presented. The atomic sample is treated as a four-level double-A system, driven by the two counterpropagating coupling fields. The probe field experiences the discontinuous refractive index variation and is reflected. Moreover, under the phase-matching condition, the four-wave mixing effect based on electromagnetically induced transparency can cause effective reflection. The Goos-Hiinchen shifts appear in both situations and are carefully investigated in this article. We refer to the first one with the incident and reflected light having identical wavelength as the linear Goos-Hiinchen shift, and the second one with the reflection wavelength determined by the phase-matching condition as the nonlinear Goos-Hiinchen shift. The differences between the two kinds of shifts, such as the incident angle range, conditions for the shift peaks, and controllability, are discussed.

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Giant Goos-Hänchen shift usingPTsymmetry

Cited by 38 publications

References 42 publications

Tunable Fano resonances via optomechanical effect and gain–loss ratio in coupled microresonators

Tunable Fano resonances via optomechanical effect and gain–loss ratio in coupled microresonators

Goos-Hänchen effect in light transmission through biperiodic photonic-magnonic crystals

Goos-Hänchen shift in a standing-wave-coupled electromagnetically-induced-transparency medium

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