Broadband perfect absorption in TMDC monolayers based on quasi-photonic crystal

Ansari, Narges; Fallah, Kimya; Mohebbi, Ensiyeh

doi:10.1007/s00339-022-05354-x

Cited by 4 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Thue-Morse PQC is constituted by Au nanopillars that find broad application in photonics. [24,[39][40][41][42][43] The geometrical lattice parameters are in the submicron scale, with a diameter of the nano-pillars of D PQC = 500 nm, a height of H PQC = 120 nm and lattice constant a = 710 nm (Figure 1j). The third structure is a square lattice metasurface (SQM), made of SiO 2 pillars characterized by a diameter D SQM = 300 nm, nominal height H SQM = 200 nm and periodicity equal to 1 μm (Figure 1n).…”

Section: Micro-and Nano-photonic Engineering Of Pristine and Modified...mentioning

confidence: 99%

Micro‐ and Nano‐Structured Bacteria Growth Media for Planar Bio‐Photonics

Caligiuri,

Leone,

Favale

et al. 2023

Advanced Optical Materials

View full text Add to dashboard Cite

Bio‐inspired and biodegradable quantum optics scenarios constitute a pathway toward environmentally friendly front‐end technologies. Such an inspiring perspective necessitates the replacement of classic gain materials with a biological counterpart like photoluminescent bacteria. It is easy to imagine that, in this case, a planar and cell‐viable substitute of classic bulk solid‐states resonators can be highly beneficial. In this paper a micro‐ and nano‐photonic structuration of both a standard and a functionalized version of a typical bacterial growth medium (Luria‐Bertani Agar – LBA) is successfully realized. Three structures belonging to the categories of photonic crystals are replicated, such as quasi‐crystals and meta‐surfaces, demonstrating how the proposed media can be used as templates for high‐end photonic applications. The optical quality of the replicated structures is confirmed by far‐field diffraction measurements. The structured growth media allow for a broad control of the surface wettability by accessing a so‐called Wenzel state, in which the original hydrophilicity of a material is increased due to the photonic structuration. Finally, the suitability of the nano‐structured LBA as a plasmonic platform is evidenced. The proposed micro‐and nano‐structured photonic growth media constitute the first, fundamental step toward quantum optical frameworks from biological media.

show abstract

Section: Micro-and Nano-photonic Engineering Of Pristine and Modified...mentioning

confidence: 99%

Micro‐ and Nano‐Structured Bacteria Growth Media for Planar Bio‐Photonics

Caligiuri,

Leone,

Favale

et al. 2023

Advanced Optical Materials

View full text Add to dashboard Cite

show abstract

“…Ansari et al . 45 investigated the electromagnetic wave propagating in the monolayer transition-metal dichalcogenides-based photonic crystal by transfer matrix method, and observed that in this photonic crystal, the absorbance coefficient is more than 75% for all incident light angles with a wavelength of 400 to 675 nm. Further, they obtained that, in WS 2 -based photonic crystal the absorbance coefficient for incident light with a wavelength of 619 nm reaches 100%.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of absorption in a CH3NH3PbI3-based photonic crystal in the presence of the monolayer MoS2

Sattari

Mirershadi

2023

Sci Rep

View full text Add to dashboard Cite

Using the transfer matrix approach, we investigate theoretically the absorbance, transmittance, and reflectance through one-dimensional CH3NH3PbI3 perovskite-based photonic crystal at room temperature. In our proposed structure, a monolayer MoS2 film is embedded between two CH3NH3PbI3 layers. We found that, the presence of monolayer MoS2 film increases the absorbance in longer wavelengths $$(\lambda > 600\begin{array}{*{20}c} \, \, {\rm nm} \\ \end{array} ).$$ ( λ > 600 nm ) . With increasing the number of periods, absorbance increases in most wavelengths of the incident light. It was shown that, by controlling the number of periods, the absorbance coefficient can be tuned according to the wavelength and angle of incident light. Furthermore, for incident light with longer wavelength, the absorbance, transmittance as well as reflectance versus thickness of the perovskite layer have an oscillatory behavior, and with increasing the number of periods this oscillatory behavior becomes more obvious and prominent. For the incident light in the infrared region, by increasing the number of periods the absorbance as opposed to the transmittance increases for different incidence angles. While, the reflectance coefficient first shows oscillatory behavior by increasing the number of periods, then with a further increase in the number of periods it reaches a constant value. The proposed structure can be useful for optoelectronic and optical devices. Such as improving the efficiency of solar cells based on the hybrid inorganic–organic perovskites and infrared sensor system.

show abstract

“…Using the MoS 2 monolayer as the repeating layer in one- or two-dimensional Photonic Crystals (PCs) and Quasi-PCs (QPCs) is suggested in Ref. 25 – 27 to achieve high absorption in a wide bandwidth. These structures forbid the light to propagate in a range of frequencies, which is called the Photonic Band Gap (PBG) and is highly sensitive to structural conditions 28 .…”

Section: Introductionmentioning

confidence: 99%

Data analysis on the three defect wavelengths of a MoS2-based defective photonic crystal using machine learning

Ansari,

Sohrabi,

Mirbaghestan

et al. 2023

Sci Rep

Self Cite

View full text Add to dashboard Cite

To reduce the dimension of optoelectronic devices, recently, Molybdenum disulfide (MoS2) monolayers with direct bandgap in the visible range are widely used in designing a variety of photonic devices. In these applications, adjustability of the working wavelength and bandwidth with optimum absorption value plays an important role. This work proposes a symmetric defective photonic crystal with three defects containing MoS2 monolayer to achieve triple narrowband defect modes with wavelength adjustability throughout the Photonic Band Gap (PBG) region, 560 to 680 nm. Within one of our designs remarkable FWHM approximately equal to 5 nm with absorption values higher than 90% for the first and third defect modes are achieved. The impacts of varying structural parameters on absorption value and wavelength of defect modes are investigated. Due to the multiplicity of structural parameters which results in data plurality, the optical properties of the structure are also predicted by machine learning techniques to assort the achieved data. Multiple Linear Regression (MLR) modeling is used to predict the absorption and wavelength of defect modes for four datasets based on various permutations of structural variables. The machine learning modeling results are highly accurate due to the obtained R2-score and cross-validation score values higher than 90%.

show abstract

Broadband perfect absorption in TMDC monolayers based on quasi-photonic crystal

Cited by 4 publications

References 27 publications

Micro‐ and Nano‐Structured Bacteria Growth Media for Planar Bio‐Photonics

Micro‐ and Nano‐Structured Bacteria Growth Media for Planar Bio‐Photonics

Enhancement of absorption in a CH3NH3PbI3-based photonic crystal in the presence of the monolayer MoS2

Data analysis on the three defect wavelengths of a MoS2-based defective photonic crystal using machine learning

Contact Info

Product

Resources

About