Voc Detections With Optical Spectroscopy

Xing, Yanpeng; Wang, Gaoxuan; Zhang, Tie; Shen, Fengjiao; Meng, Liuyan; Wang, Lihui; Li, Fangmei; Zhu, Yuchuan; Zheng, Yuhao; He, Na; He, Sailing

doi:10.2528/pier22033004

Cited by 19 publications

(6 citation statements)

References 82 publications

(96 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, reconfigurable filters or detectors based on liquid crystals (LC), [ 20 ] 2D materials [ 21,22 ] and perovskite materials [ 23 ] with broadband response have been proposed and applied for the so‐called reconstructive spectrometer. Due to their multiplexing feature, Fellgett's advantage like Fourier‐transform infrared spectroscopy [ 24,25 ] is empowered, opening a new way for high‐throughput spectroscopy. However, for the present broadband tunable filters, complex configuration, expensive fabrication process (especial lithography) or burdensome calibration processes are basic necessities for precise spectrum reconstruction.…”

Section: Introductionmentioning

confidence: 99%

A High Throughput Tunable Filter Module for Multispectral Imaging

Chen,

Guo,

Lin

et al. 2024

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

Tunable filters are vital not only for dynamic display but also in the miniaturized spectral imaging system. Yet, the present tunable devices possess low optical throughput, bulky volume, slow response, or complex configuration. In this paper, the study proposed and experimentally demonstrated a compact tunable filter module based on metagratings combined with liquid crystals (LC). By the synergetic effect between the birefringent LC and the dichroic metagratings, the module possesses distinct transmissive features by electrically tuning the LC material, resulting from the polarization interference effect. A simple nanoimprinting method, which is suitable for the mass production of nanostructures is adopted for low‐cost fabrication. These unique features endow the present tunable filter module with low cost, high optical throughput, and compact volume. As a proof of concept, a multispectral imager is built with this filter based on a commercial microscope. Experimental results show the system response is five times higher in optical throughput across the whole visible region than the traditional liquid crystal tunable filter and the signal‐to‐noise ratio can be improved by 7 dB. Considering the feasibility of nanoimprinting, this module paves the way for spectral imaging in low‐light conditions and on‐site scenarios such as tongue diagnosis and food quality inspection.

show abstract

Section: Introductionmentioning

confidence: 99%

A High Throughput Tunable Filter Module for Multispectral Imaging

Chen,

Guo,

Lin

et al. 2024

Advanced Optical Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Laser absorption spectroscopy has become a powerful tool for gas detection in atmospheric sciences, industrial safety and protection, leakage identification, and many other applications because of the exceptional selectivity and sensitivity in the infrared spectral region [1][2][3]. With the development of semiconductor lasers, narrow linewidth lasers can operate at specific wavelengths by adjusting the injection current or operating temperature, and accurate measurements can be achieved by scanning the absorption lines of the gas [4].…”

Section: Introductionmentioning

confidence: 99%

In Situ All-Fiber Remote Gas Sensing Strategy Based on Anti-Resonant Hollow-Core Fiber and Middle-Hole Eccentric-Core Fiber

Geng,

Zhang,

et al. 2024

Photonics

Self Cite

View full text Add to dashboard Cite

Laser absorption spectroscopy for gas sensing basically employs an air pump located at the gas cell probe to draw in ambient gases, and the on-site gas sample is subsequently delivered for laboratory non-real-time analysis. In this study, an in situ all-fiber remote gas sensing strategy is proposed. The anti-resonant hollow-core fiber (AR-HCF) is used as the sensing fiber, and a 20 m middle-hole eccentric-core fiber (MH-ECF) is used as the conducting fiber. The remote ambient gases can be inhaled into the AR-HCF as a result of the negative pressure transmitted through the MH-ECF when pumping gas at the interface of the MH-ECF. Since the real-time monitoring of greenhouse gas emissions in industrial processes holds immense significance in addressing global climate change, the detection of CO2 is achieved with the TDLAS-WMS method, and the gas sensing performance of an all-fiber remote gas sensing structure (RGS) is experimentally validated. The response time t90 under the pumping condition is about 456 s, which is about 30 times faster than that of free diffusion. Allan deviation results for more than one hour of continuous monitoring indicate that the lowest detection limit for the all-fiber RGS is 0.0373% when the integration time is 184 s. The all-fiber remote gas sensing strategy also possesses the benefits of being applicable to multiplex, hazardous gas environment passive monitoring.

show abstract

“…In comparison to digital light-field modulators and metamaterials, metasurfaces not only have the powerful ability to modulate optical properties on the subwavelength scale but also offers advantages such as low absorption loss, ultra-thinness, and small pixel size. Metasurfaces provide a new perspective for the design of various optical devices, such as orbital angular momentum devices [ 20 , 21 , 22 , 23 , 24 ], cloak devices [ 25 , 26 , 27 , 28 , 29 , 30 , 31 ], and ultra-thin planar lenses [ 32 , 33 , 34 ] and spectroscopes [ 35 , 36 ]. A cutting-edge application of nanotechnology is the combination of metasurface and CGH, which composes metasurfaces by mapping CGH-generated holograms based on the local scattering properties of predesigned nanostructures to realize holography.…”

Section: Introductionmentioning

confidence: 99%

Metasurface Holography with Multiplexing and Reconfigurability

Zou,

Jin,

Zhu

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

Metasurface holography offers significant advantages, including a broad field of view, minimal noise, and high imaging quality, making it valuable across various optical domains such as 3D displays, VR, and color displays. However, most passive pure-structured metasurface holographic devices face a limitation: once fabricated, as their functionality remains fixed. In recent developments, the introduction of multiplexed and reconfigurable metasurfaces breaks this limitation. Here, the comprehensive progress in holography from single metasurfaces to multiplexed and reconfigurable metasurfaces is reviewed. First, single metasurface holography is briefly introduced. Second, the latest progress in angular momentum multiplexed metasurface holography, including basic characteristics, design strategies, and diverse applications, is discussed. Next, a detailed overview of wavelength-sensitive, angle-sensitive, and polarization-controlled holograms is considered. The recent progress in reconfigurable metasurface holography based on lumped elements is highlighted. Its instant on-site programmability combined with machine learning provides the possibility of realizing movie-like dynamic holographic displays. Finally, we briefly summarize this rapidly growing area of research, proposing future directions and potential applications.

show abstract

Voc Detections With Optical Spectroscopy

Cited by 19 publications

References 82 publications

A High Throughput Tunable Filter Module for Multispectral Imaging

A High Throughput Tunable Filter Module for Multispectral Imaging

In Situ All-Fiber Remote Gas Sensing Strategy Based on Anti-Resonant Hollow-Core Fiber and Middle-Hole Eccentric-Core Fiber

Metasurface Holography with Multiplexing and Reconfigurability

Contact Info

Product

Resources

About