A Spatial-Frequency Patching Metasurface Enabling Super-Capacity Perfect Vector Vortex Beams

Physics, Optics, Chemistry, Nanoscience, Materials Science, Information Science, Electronic Information,
optical vortices   metasurfaces   vector vortex beams   spatial-frequency patching   multi-dimensional information communication  

The Realization of Super-Capacity Perfect Vector Vortex Beams Research Background and Problem Statement Optical vortices, with their unique orbital angular momentum (OAM) characteristics, have demonstrated great potential in applications such as optical multiplexing, particle manipulation, imaging, holographic display, optical communication, and op...

Impact of Device Design Parameters on Quantum Efficiency of Solar Cells and Revelation of Recombination Mechanism

Chemistry, Energy Chemistry, Materials Chemistry, Engineering, Energy Engineering, Materials Science, Information Science, Semiconductors and Information Devices,
quantum efficiency   defect signature   SRV   modeling   solar cells  

Study on Quantum Efficiency and Recombination Mechanism of Solar Cells Academic Background In the field of solar cell research, quantum efficiency (Quantum Efficiency, QE) is a core metric for evaluating device performance. It reflects the efficiency of incident photons being converted into electron-hole pairs, thereby revealing key information abo...

Conceptual Design of Multimode Interference-Based Photonic Crystal Mach-Zehnder Interferometer (De)Interleavers

Physics, Optics, Engineering, Electrical Engineering, Materials Science, Information Science, Electronic Information,
Photonic Crystals   Integrated Photonics   Mach-Zehnder Interferometer   Multimode Interference   (De)Multiplexing   (De)Interleaver  

Research Background and Problem Statement With the rapid development of modern optical communication technology, wavelength division multiplexing (WDM) systems play a core role in achieving high-capacity, multifunctional optical networks. Among these, (de)interleavers, as key components of wavelength demultiplexing structures, can efficiently separ...

Design and Study of Graphene-Based Programmable Dual Dipole Antenna with Parasitic Elements

Design and Study of Graphene-Based Programmable Dual Dipole Antenna with Parasitic Elements

Physics, Electromagnetism, Engineering, Electrical Engineering, Materials Science, Information Science, Semiconductors and Information Devices,
graphene   antenna   beamforming   sub-terahertz   transparent antenna  

Graphene-based Programmable Dual Dipole Antenna Academic Background The terahertz (THz) band (0.1 to 10 THz) has garnered significant attention in fields such as wireless communication, high-resolution imaging, and body-centric communication due to its distinctive characteristics. However, a major drawback of terahertz waves is the substantial prop...

Structural Design of a Mid-Infrared Low-Noise Waveguide Photodetector Integrated with an Ultra-Short Waveguide Taper

Physics, Optics, Materials Science, Information Science, Electronic Information, Semiconductors and Information Devices,
mid-infrared   waveguide photodetector   ultra-short waveguide taper   dark current   noise equivalent power  

Academic Background The mid-infrared spectrum range (2.5 to 20 µm) is widely used in gas detection, optical communication, high-quality imaging, bacterial research, and soil composition analysis due to its characteristic absorption peaks of many molecular bonds. Among these applications, waveguide photodetectors have become a key component in photo...

Design of High-Gain Multi-Band Circularly Polarized Bi-Layered Metasurface Patch Array Antenna

Design of High-Gain Multi-Band Circularly Polarized Bi-Layered Metasurface Patch Array Antenna

Engineering, Electrical Engineering, Information Science, Electronic Information,
terahertz antenna   circular polarization   metasurface   dual-orthogonal feed   silicon substrate  

Research on the Design of High Gain Multi-band Circularly Polarized Bi-layered Metasurface Patch Array Antenna Academic Background and Research Motivation Terahertz (THz) band communication has received widespread attention in recent years due to its potential to expand bandwidth in wireless communication systems. However, the application of terahe...