Perfect optical absorbers in a wide range of incidence by photonic heterostructures containing layered hyperbolic metamaterials

Lu, Guang; Wu, Feng; Zheng, Minjia; Chen, Chaoxin; Zhou, Xiachen; Diao, Chao; Liu, Fen; Du, Guiqiang; Xue, Chunhua; Jiang, Haitao; Chen, Hong

doi:10.1364/oe.27.005326

Cited by 51 publications

(20 citation statements)

References 40 publications

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“…The electromagnetic properties of HMMs are routinely predicted by EMA, which is generally applied when the vacuum wavelength of light is much larger than the unit cell or period of the hyperbolic metamaterial [29][30][31][32] . In ref.…”

Section: Introductionmentioning

confidence: 99%

Investigation of effective media applicability for ultrathin multilayer structures

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Investigation of effective media applicability for ultrathin multilayer structures

et al. 2019

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show abstract

“…spectral bands [13][14][15][16][17][18][19][21][22][23][24][25][26][27], and there are only a few studies on selective absorption enhancement of HMMs.…”

Section: Design Principlesmentioning

confidence: 99%

“…The absorption bandwidths of peak 1 and peak 2 are 34.6 nm and 28.0 nm, respectively. Comparing with many previous HMMs-based absorbers, which were mainly designed to achieve broadband absorption enhancement in different wavelength regions [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27], the absorption response of the HRA shows the property of narrowband absorption enhancement. In addition, the sideband Figure 3 shows optical properties of the HRA, and the structural parameters are the same as those in Figure 1a.…”

Section: Design Principlesmentioning

confidence: 99%

“…It has been shown that HMMs can be used to enhance light absorption due to their high-k modes and divergent photonic density of states [4,12]. To date, many efforts have been made to improve light absorption of HMMs with the absorption wavelengths covering the microwave [13], terahertz [14][15][16], infrared [17][18][19][20][21][22] and visible wavelength regions [23][24][25][26][27]. In real applications, selective absorption enhancement is highly desired in fields such as thermal radiation tailoring [28], sensitive detection [29] and sensing [30].…”

Section: Introductionmentioning

confidence: 99%

“…In real applications, selective absorption enhancement is highly desired in fields such as thermal radiation tailoring [28], sensitive detection [29] and sensing [30]. However, previous studies of HMMs mainly focused on light absorption enhancement in broad spectral bands [13][14][15][16][17][18][19][21][22][23][24][25][26][27], and there are only a few studies on selective absorption enhancement of HMMs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dual-Band Light Absorption Enhancement in Hyperbolic Rectangular Array

Sang

Wang

et al. 2019

Applied Sciences

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The effect of dual-band light absorption enhancement in a hyperbolic rectangular array (HRA) is presented. The enhanced light absorption of the HRA results from the propagating surface plasmon (PSP) resonance, and a dual-band absorption with low and flat sideband level can be realized. The impedance theory is used to evaluate the absorption properties of the HRA, and shows that the input impedances of the HRA varied abruptly around the absorption bands to meet the impedance matching. The absorption spectra of the HRA can be estimated using the effective medium theory (EMT), and its accuracy can be improved as the number of film stacks is increased. The dual-band absorptions of the HRA are very robust to the variations of the width and the number of film stack. Potential application in refractive index sensing can be achieved by utilizing the two absorption bands.

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Hyperbolic Bismuth–Dielectric Structure for Terahertz Photonics

Zaitsev

Demchenko

Makarova

et al. 2020

Physica Rapid Research Ltrs

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Hyperbolic medium is a special class of strongly anisotropic materials described by diagonal permittivity tensor with the principal components being of the opposite signs, which results in a hyperbolic shape of isofrequency contours. These media support propagating electromagnetic waves with extremely large wave vectors exhibiting unique optical properties and applications such as negative refraction, subwavelength imaging, radiative heat transfer manipulation, enhancing spontaneous emission rate (Purcell factor), biosensing, and nanoscale light confinement. Hyperbolic metamaterials have been experimentally realized for optical, infrared, and microwave frequency ranges. For the terahertz (THz) frequency range, graphene‐based and bismuth‐based media are only theoretically predicted to have a hyperbolic dispersion relation. Herein, the experimental evidence of such dispersion in bismuth–dielectric materials at THz frequencies is shown. THz waveforms transmitted through ultrathin bismuth film/dielectric substrate structures are measured and the negative time delay caused by transition between the elliptic and hyperbolic dispersion at bismuth thickness increase is revealed. In the hyperbolic regime, the switching between effective near‐zero and negative refractive index regime is demonstrated, which depends on the bismuth film thickness and dielectric substrate optical properties. The outcomes demonstrate the possibility for realizing easy planar hyperbolic media for THz photonics, sensing, imaging, and communication systems.

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Perfect optical absorbers in a wide range of incidence by photonic heterostructures containing layered hyperbolic metamaterials

Cited by 51 publications

References 40 publications

Investigation of effective media applicability for ultrathin multilayer structures

Investigation of effective media applicability for ultrathin multilayer structures

Dual-Band Light Absorption Enhancement in Hyperbolic Rectangular Array

Hyperbolic Bismuth–Dielectric Structure for Terahertz Photonics

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