All‐Dielectric Fabry–Pérot Cavity Design for Spectrally Selective Mid‐Infrared Absorption

Abstract

All‐dielectric metamaterials that exhibit broadband absorption of infrared (IR) radiation are promising platforms for the development of modern and applied nanophotonic technologies ranging from precise biosensing to high‐resolution imaging and high photon‐yield light detection. Herein, bulk meta‐absorbers comprising dielectric layers to provide broadband absorption of mid‐IR light are structured and studied. Through computational investigations and experimental assessments, the geometric parameters of the metastructure are judiciously selected and the peak of absorption is tuned to encompass the mid‐wave IR (MWIR) to long‐wave IR (LWIR) wavelengths, where absorbance of over ≈95% is achieved in the conducted analyses. These results are obtained using numerical optimization to achieve the highest absorption peak values. Thus, based on the mechanistic understanding of the conducted study, the reported percentage is the highest possible absorption efficiency obtained by the absorber metastructure. Importantly, the projected meta‐absorber is polarization insensitive and performs consistently over a wide range of incidence angles. The engineered multilayer architecture based on artificial media provides new possibilities for the broadband manipulation and control of the IR light.

Modeling of a dual-wavelength fiber amplification system for further mid-infrared generation

“…The LabVIEW calculation model for solving the nonlinear coupling differential equations ( 4)- (7) are compiled through the fourth-order Runge Kutta methods [10,41]. The program can help to find the optimal fiber length under specific pump power by varying the fiber length when the pump power is set to be constant.…”

“…The MIR ultrashort pulsed lasers own the following two features: (a) a broad spectral range that can be widely used in gas detection, cancer diagnosis, pollutant labeling, food quality control, and spectroscopy; (b) a feature of the narrow time domain that plays essential roles in strong-field physics, laser surgery, attosecond science, and material processing. Therefore, there is an essential and broad application value for MIR ultrashort pulse generation research [2][3][4][5][6][7]. * Author to whom any correspondence should be addressed.…”

Design, preparation, and property analysis of metal/dielectric multilayer film with wavelength selectivity

“…Among a variety of energy-saving glasses, metal/dielectric multilayer films have been widely discussed in the academic world because of their simple structure, high visible light transmittance and high near-infrared reflectivity. Currently, metal/dielectric multilayer films have important applications in energy-saving glass [3][4][5][6][7][8][9], solar energy utilization [10][11][12][13][14][15][16][17], infrared stealth [18][19][20][21][22][23][24], and other fields. The core idea is to optimize the thickness and material of each film layer to achieve regulation of the radiation characteristics of each band.…”

Original Na5(Lu1–x–yGdxYy)9F32: Pr3+/Ho3+ Hybrid Single Crystals for Efficient ∼2.9 μm Mid-Infrared Emission

“…A ∼3 μm mid-infrared (MIR) laser has been extensively applied in the areas of remote sensing, gas monitoring, surgery, and so forth. Owing to the vibrational absorption band of water situated in this range of spectrum and partially overlapped with the window of atmospheric transmission. − Moreover, the ∼3 μm laser is also a favorable excitation source for optical parametric generation or far-infrared optical parametric oscillation . In recent decades, many solid-state material-doped rare-earth ions have been developed to fulfill the output of ∼3 μm MIR laser such as glasses, single crystals, and transparent ceramics …”