Study of Omnidirectional Reflection Bandgap Extension in One-Dimensional Quasi-Periodic Metallic Photonic Crystal

NANO ◽  
2015 ◽  
Vol 10 (06) ◽  
pp. 1550088 ◽  
Author(s):  
Xuyang Xiao ◽  
Runping Chen
Keyword(s):  
Photonic Crystal ◽  
Near Infrared ◽  
Incidence Angle ◽  
Incident Angle ◽  
Stop Band ◽  
Wavelength Region ◽  
Short Wavelength Region ◽  
One Dimensional ◽  
Metal Thickness ◽  
Metallic Photonic Crystal

The reflection properties of light wave propagation in one-dimensional quasi-periodic metallic photonic crystal (PC) are comprehensively analyzed by transfer matrix method. In this work, we form a Fibonacci sequence quasi-periodic PC composed of metal and dielectric. The results demonstrate that the reflection stop band is strongly dependent on the periodic structure, metal thickness and incident angle. For this structure, the reflection stop band ranges from the visible light region to near-infrared region. Compared with the periodic metallic PC, the reflection stop bandwidth of our structure is wider. When the metal thickness increases, the reflection stop band is significantly enlarged. Furthermore, the reflection stop bandwidth slowly gets narrow and shifts to short wavelength region with the increase of incidence angle. Considering TE and TM wave at all incident angles, there is an omnidirectional reflection bandgap with width of 241nm for our investigated quasi-periodic metal PC.

DISORDERED ONE-DIMENSIONAL METALLIC-DIELECTRIC PHOTONIC CRYSTAL REFLECTOR

2009 ◽  
Vol 23 (05) ◽  
pp. 715-722
Author(s):  
LIMEI QI ◽  
ZIQIANG YANG ◽  
XI GAO
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Incident Angle ◽  
Stop Band ◽  
Frequency Dependent ◽  
One Dimensional ◽  
First Time ◽  
High Reflection

The reflected properties of one-dimensional frequency-dependent metallic-dielectric photonic crystals are investigated when disorders are introduced for the first time. It is demonstrated that disordered metallic-dielectric photonic crystal provides remarkably high reflection range compared with the corresponding period metallic-dielectric one when the degree of disorder is moderately chosen, and a wider stop band will be obtained with the increasing of periods. At last, the reflected properties influenced by incident angle for different polarizations are also calculated and discussed.

Indirect Measurements of Coherent Thermal Emission From a Truncated Photonic Crystal Structure

2007 ◽  
Author(s):  
B. J. Lee ◽  
Y. -B. Chen ◽  
Z. M. Zhang
Keyword(s):  
Photonic Crystal ◽  
Near Infrared ◽  
Thermal Emission ◽  
Incidence Angle ◽  
Stop Band ◽  
Spatial Coherence ◽  
Infrared Region ◽  
Silver Layer ◽  
Specular Reflectance ◽  
Infrared Spectrometer

Recently, coherent thermal emission characteristics have been demonstrated for both polarizations from a multilayer structure consisting of a one-dimensional (1D) photonic crystal (PC) coated on a silver layer, i.e., PC-on-Ag structure. The key to enabling coherent emission is to excite a surface wave at the PC-Ag interface in the stop band of the PC. A detailed experimental investigation is conducted to demonstrate coherent thermal emission in the near-infrared region from the fabricated PC-on-Ag structure. A Fourier-transform infrared spectrometer, together with a specular reflectance accessory and a polarizer, is used to measure the reflectance at incidence angles of 30° and 45°. In addition, an angle-resolved scatterometer is used to measure the reflectance at the wavelength of 891 nm. Measured reflectance shows very good temporal and spatial coherence. Furthermore, the magnitude of the evanescent waves at the PC-Ag interface is plotted in terms of the wavelength and the incidence angle. It is found that dip locations of the measured reflectance precisely match with the condition when the field intensity is largely enhanced.

scholarly journals Coupling of light and mechanics in a photonic crystal waveguide

2020 ◽  
Vol 117 (47) ◽  
pp. 29422-29430
Author(s):  
J.-B. Béguin ◽  
Z. Qin ◽  
X. Luan ◽  
H. J. Kimble
Keyword(s):  
Photonic Crystal ◽  
Near Infrared ◽  
Near Field ◽  
Stop Band ◽  
Band Edge ◽  
Quantum Limit ◽  
Spatial Period ◽  
Single Photons ◽  
Photonic Crystal Waveguide ◽  
Optomechanical Coupling

Observations of thermally driven transverse vibration of a photonic crystal waveguide (PCW) are reported. The PCW consists of two parallel nanobeams whose width is modulated symmetrically with a spatial period of 370 nm about a 240-nm vacuum gap between the beams. The resulting dielectric structure has a band gap (i.e., a photonic crystal stop band) with band edges in the near infrared that provide a regime for transduction of nanobeam motion to phase and amplitude modulation of an optical guided mode. This regime is in contrast to more conventional optomechanical coupling by way of moving end mirrors in resonant optical cavities. Models are developed and validated for this optomechanical mechanism in a PCW for probe frequencies far from and near to the dielectric band edge (i.e., stop band edge). The large optomechanical coupling strength predicted should make possible measurements with an imprecision below that at the standard quantum limit and well into the backaction-dominated regime. Since our PCW has been designed for near-field atom trapping, this research provides a foundation for evaluating possible deleterious effects of thermal motion on optical atomic traps near the surfaces of PCWs. Longer-term goals are to achieve strong atom-mediated links between individual phonons of vibration and single photons propagating in the guided modes (GMs) of the PCW, thereby enabling optomechanics at the quantum level with atoms, photons, and phonons. The experiments and models reported here provide a basis for assessing such goals.

ELECTROMAGNETIC WAVE PROPAGATION CHARACTERISTICS IN A ONE-DIMENSIONAL METALLIC PHOTONIC CRYSTAL

2008 ◽  
Vol 17 (03) ◽  
pp. 255-264 ◽  
Author(s):  
ARAFA H. ALY ◽  
SANG-WAN RYU ◽  
CHIEN-JANG WU
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Photonic Crystal ◽  
Transfer Matrix Method ◽  
Electromagnetic Wave Propagation ◽  
Plasma Frequency ◽  
Dielectric Materials ◽  
Propagation Characteristics ◽  
One Dimensional ◽  
Metallic Photonic Crystal

We theoretically studied electromagnetic wave propagation in a one-dimensional metal/dielectric photonic crystal (1D MDPC) consisting of alternating metallic and dielectric materials by using the transfer matrix method. We performed numerical analyses to investigate the propagation characteristics of a 1D MDPC. We discuss the details of the calculated results in terms of the electron density, the thickness of the metallic layer, different kinds of metals, and the plasma frequency.

Preparation and Optical Properties of One-Dimensional Ag/SiOx Photonic Crystal

2014 ◽  
Vol 576 ◽  
pp. 27-31
Author(s):  
Gai Mei Zhang ◽  
Can Wang ◽  
Yan Jun Guo ◽  
Wang Wei ◽  
Xiao Xiang Song
Keyword(s):  
Photonic Crystal ◽  
Band Gap ◽  
Electromagnetic Waves ◽  
Photonic Band Gap ◽  
Incident Angle ◽  
One Dimensional ◽  
The One ◽  
Photonic Band ◽  
Gap Width ◽  
Band Gap Width

The photonic crystal has the property that electromagnetic waves with interval of frequency in photonic band gap (PBG) can not be propagated, so it has important applying and researching value. The traditional one-dimensional photonic crystal is with narrow band gap width, and the reflection within the band is small, especially the band gap is sensitive to the incident angle and the polarization of light. A new photonic band gap (PBG) structure, metallodielectric photonic crystal by inserting metal film in the medium can overcomes the shortcomings mentioned above. The one-dimensional Ag/SiOx photonic crystal was prepared, and theoretical and experimental researches were developed. The results show that photonic band gap appears gradually and the band gap width increase with increasing of period of repeating thickness. With the thickness of Ag film increasing, the band gap width increases, but the starting wavelength of the photonic band gap keeps unchanged. With thickness of SiOx film increasing, the band gap width of photonic band gap also increases, but it is not obvious and starting wavelength increases.

Analysis of Defect Modes in One-Dimensional Photonic Crystal with a Dielectric-Superconducting Pair Defect

2014 ◽  
Vol 1035 ◽  
pp. 437-441
Author(s):  
Jin Xia Gao ◽  
Ji Jiang Wu
Keyword(s):  
Photonic Crystal ◽  
Incidence Angle ◽  
Defect Mode ◽  
Mode Frequency ◽  
Pronounced Difference ◽  
Defect Modes ◽  
One Dimensional ◽  
Left Handed ◽  
Substitutional Defect ◽  
Pair Defect

One-dimensional dielectric photonic crystals (PCs) with complex substitutional defect layers, consisting of superconducting (SC) and dielectric sublayers are theoretically studied. The influence of the incidence angle on the photonic gap spectra is theoretically analyzed. The pronounced difference in the transmittivity spectra of the PCs with right-handed (RH) and left-handed (LH) positions of the superconducting defect sublayer with respect to the dielectric defect sublayer is demonstrated. It is observed that, for the case of RH SC defect sublayer, the position of the defect mode and the transmittivity at the defect mode frequency strongly depend on the thickness of the superconducting sublayer as well as on the temperature. But the defect modes of the PCs with LH SC defect sublayer are nearly invariant upon the change of the thickness of the superconducting sublayer and the temperature.

Imaging properties and negative refraction of the metallic photonic crystal at near-infrared frequency

2012 ◽  
Vol 152 (11) ◽  
pp. 929-932 ◽  
Author(s):  
Shuai Feng ◽  
Yuxi Li ◽  
Bo Lei ◽  
Jieying Hu ◽  
Yiquan Wang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Near Infrared ◽  
Negative Refraction ◽  
Imaging Properties ◽  
Metallic Photonic Crystal

scholarly journals Radiometric Calibration for Incidence Angle, Range and Sub-Footprint Effects on Hyperspectral LiDAR Backscatter Intensity

2020 ◽  
Vol 12 (17) ◽  
pp. 2855
Author(s):  
Changsai Zhang ◽  
Shuai Gao ◽  
Wang Li ◽  
Kaiyi Bi ◽  
Ni Huang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Spatial Information ◽  
Incidence Angle ◽  
Incident Angle ◽  
Calibration Method ◽  
Correction Method ◽  
Intensity Data ◽  
Radiometric Calibration ◽  
Backscatter Intensity ◽  
Reference Target

Terrestrial hyperspectral LiDAR (HSL) sensors could provide not only spatial information of the measured targets but also the backscattered spectral intensity signal of the laser pulse. The raw intensity collected by HSL is influenced by several factors, among which the range, incidence angle and sub-footprint play a significant role. Further studies on the influence of the range, incidence angle and sub-footprint are needed to improve the accuracy of backscatter intensity data as it is important for vegetation structural and biochemical information estimation. In this paper, we investigated the effects on the laser backscatter intensity and developed a practical correction method for HSL data. We established a laser ratio calibration method and a reference target-based method for HSL and investigated the calibration procedures for the mixed measurements of the effects of the incident angle, range and sub-footprint. Results showed that the laser ratio at the red-edge and near-infrared laser wavelengths has higher accuracy and simplicity in eliminating range, incident angle and sub-footprint effects and can significantly improve the backscatter intensity discrepancy caused by these effects.

Near-field transmission spectroscopy of one-dimensional metallic photonic crystal slabs

2004 ◽  
Author(s):  
Ulrich Neuberth ◽  
Nicole Rau ◽  
Martin Wegener ◽  
Stefan Linden ◽  
Suresh Pereira ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Near Field ◽  
One Dimensional ◽  
Photonic Crystal Slabs ◽  
Transmission Spectroscopy ◽  
Metallic Photonic Crystal

Nonreciprocal and enhancement effect of one-dimensional magnetic photonic crystal with a gain defect

2019 ◽  
Vol 33 (06) ◽  
pp. 1950034
Author(s):  
Yi-Heng Wu ◽  
Yun-Tuan Fang
Keyword(s):  
Magnetic Field ◽  
Photonic Crystal ◽  
External Magnetic Field ◽  
Incident Angle ◽  
Gain Coefficient ◽  
Defect Layer ◽  
Gain Medium ◽  
Enhancement Effect ◽  
One Dimensional ◽  
Transmission Properties

The transmission properties of one-dimensional photonic crystal composed of the Gyromagnetic and gain medium are investigated. The energy loss due to the Gyromagnetic medium is compensated by adding one gain defect layer. From the analysis, it is found that both the nonreciprocal and enhancement effect are affected considerably by the incident angle, layer thickness, external magnetic field and gain coefficient. Specifically, it is demonstrated that the gain defect layer plays an important role in achieving nonreciprocal and enhancement transmission.

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