Dynamic control of hybrid grafted perfect vector vortex beams

Ahmed, Hammad; Ansari, Muhammad Afnan; Li, Yan; Zentgraf, Thomas; Mehmood, Muhammad Qasim; Chen, Xianzhong

doi:10.1038/s41467-023-39599-8

Cited by 42 publications

(10 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Assume there are N optimization objectives. In each iteration, the width gradients corresponding to the jth objective can be written as 27,28 (2) where w represents the width distribution of the structure. ε1 and ε2 denote the dielectric constants of the environment and the structure, respectively.…”

Section: Methodsmentioning

confidence: 99%

Multi-objectives optimization for catenary meta-optics via field-driven optimization

Chen,

Zhang,

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

View full text Add to dashboard Cite

Catenary metasurface has been widely used in fields such as wild-angle imaging, spectral detection, and broadband absorbers, due to its advantages of high efficiency and broadband. In our previous studies, perfect wavefront control of catenary metasurface is achieved via field-driven optimization (FDO). However, the proposed method focuses solely on the performance of catenary metasurfaces at a specific wavelength. Here, considering the broadband and multifunctional of the catenary and catenary-like metasurfaces, multi-objectives FDO is proposed. With 30 iterations, the average diffraction efficiency of the catenary metasurface increases to ~96% at the wavelength of 9-13 μm. In addition, considering the functionality, the catenary and catenary-like metasurfaces are optimized with a pair of orthogonal polarized light incidences. The optimization process preserves the chiral nature of the catenary metasurface. After 30 iterations, the diffraction efficiency of the catenary metasurface is improved from 96.4% to 99.2%. For catenary-like metasurfaces, the diffraction efficiencies exceed 90% for both left-handed and right-handed elliptically polarized light incidences. Our work provides a methodology for designing multifunctional complex continuous metasurfaces, which may further promote catenary optics.

show abstract

Section: Methodsmentioning

confidence: 99%

Multi-objectives optimization for catenary meta-optics via field-driven optimization

Chen,

Zhang,

et al. 2024

Advanced Fiber Laser Conference (AFL2023)

View full text Add to dashboard Cite

show abstract

“…We use an axicon after the single-mode fiber to produce the Bessel beam. The perfect vortex beam is obtained by Fourier transforming the Bessel beam through a double-glued lens, [25,26] as shown in Fig. 1(c).…”

Section: Experimental Setup and Measurement Ofmentioning

confidence: 99%

Spatial quantum coherent modulation with perfect hybrid vector vortex beam based on atomic medium

Ma 马,

Yang 杨,

Chang 常

et al. 2024

Chinese Phys. B

View full text Add to dashboard Cite

The perfect hybrid vector vortex beam (PHVVB) with helical phase wavefront structure has aroused significant concern in recent years, as its beam waist does not expand with the topological charge (TC). In this work, we investigate the spatial quantum coherent modulation effect with PHVVB based on the atomic medium, and we observe the absorption characteristic of the PHVVB with different TCs under variant magnetic fields. We find that the transmission spectrum linewidth of PHVVB can be effectively maintained regardless of the TC. Still, the width of transmission peaks increases slightly as the beam size expands in hot atomic vapor. This distinctive quantum coherence phenomenon, demonstrated by the interaction of an atomic medium with a hybrid vector-structured beam, might be anticipated to open up new opportunities for quantum coherence modulation and accurate magnetic field measurement.

show abstract

“…Nanoscale lasers and photovoltaic (PV) cells are examples of optoelectronic devices realized on the nanoscale. Ultrathin artificially engineered structures exhibiting unprecedented capability to manipulate electromagnetic waves showed great potential to miniaturize the bulky components [1]- [4]. The quest for electrical energy in the current era for an improved lifestyle has led to exploring myriad alternatives for its generation.…”

Section: Introductionmentioning

confidence: 99%

An investigation of inorganic ETL materials for carbon-based HTL-free perovskite solar cell

Ijaz,

Khan,

Massoud

2023

Photonics for Energy III

View full text Add to dashboard Cite

Nanomaterials and nanotechnology have a pivotal role in reducing the footprint of target devices in many fields, in particular electronics and optics. The design of solar cells for meeting energy needs has also been taking advantage of such advancements in nanotechnology. One of the emerging types of solar cells is perovskite solar cells, which are not only cheap but efficient as well. There has been a lot of progress made in their design based on materials and structure. The continuous endeavors for further reduction of the device cost for large-scale deployment have led to a Hole Transparent Layer (HTL)-free structure with carbon electrodes instead of noble metals, as the work function of carbon is close to that of gold. The device layers, including the absorber and Electron Transport Layer (ETL), hold fundamental importance for an HTL-free design where TiO2 has been a very common material for ETL in perovskite solar cells, but it offers low conductivity and is susceptible to photo-catalysis on exposure to UV light. Therefore, we have investigated different materials, including WS2 (BG: 1.8 eV), WO3 (BG: 2.6 eV), ZnSe (BG: 2.82 eV), ZnO (BG: 3.3 eV) for being suitable alternatives to TiO2 (BG: 3.2 eV) as an ETL material. The device structure follows the configuration FTO/ETL/IDL/CH3NH3PbI3/carbon. The optimization of different design parameters, including layer thicknesses, doping concertation, carrier mobility, diffusion length, and operating temperature, has been carried out. The device with ETL made of ZnSe yielded the best results as Jsc of 24.77 mA/cm 2 , Voc of 1.25 V, FF of 86.29%, and a PCE of 26.76% were obtained.

show abstract

Dynamic control of hybrid grafted perfect vector vortex beams

Cited by 42 publications

References 45 publications

Multi-objectives optimization for catenary meta-optics via field-driven optimization

Multi-objectives optimization for catenary meta-optics via field-driven optimization

Spatial quantum coherent modulation with perfect hybrid vector vortex beam based on atomic medium

An investigation of inorganic ETL materials for carbon-based HTL-free perovskite solar cell

Contact Info

Product

Resources

About