Formation of gigahertz pulse train by chirped terahertz pulses interference.

Sci Rep

International Laboratory of Femtosecond Optics and Femtotechnologies, ITMO University, St. Petersburg, 197101, Russia.

Published: June 2020

The state-of-art broadband THz sources can contribute to the development of short-range 6G communications. This paper has demonstrated the feasibility of forming the controllable sequence of THz subpulses in the temporal domain and the corresponding quasidiscrete spectrum by the interference of two THz pulses with an exponential chirp. Moreover, due to small time delay between these pulses the temporal and spectral structures are similar to each other (so-called "linkage relation"). This will benefit information encoding in the THz range. The calculated metrics for the prototype communication channel based on the proposed method are competitive with existing short-range THz CW channels.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7289863PMC
http://dx.doi.org/10.1038/s41598-020-66437-4DOI Listing

Publication Analysis

Top Keywords

thz
5
formation gigahertz
4
gigahertz pulse
4
pulse train
4
train chirped
4
chirped terahertz
4
terahertz pulses
4
pulses interference
4
interference state-of-art
4
state-of-art broadband
4

Similar Publications

Advances in Nanoengineered Terahertz Technology: Generation, Modulation, and Bio-Applications.

Research (Wash D C)

January 2025

Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore.

Article Synopsis
  • Recent advancements in nanotechnology have led to the development of compact and efficient terahertz (THz) devices, utilizing structures like nano-thick heterostructures and metasurfaces for better control over THz wave generation and modulation.
  • These innovations have significantly improved THz spectroscopy, imaging, and bio-applications, resulting in enhanced resolution and sensitivity for various uses.
  • The review covers the latest generation and modulation techniques, explores novel biosensing methods, and discusses future challenges and trends in this evolving field, aiming to provide insights for the development of next-generation THz technologies.
View Article and Find Full Text PDF

Design of a graphene-based chiral trifunctional tunable terahertz metasurface.

Phys Chem Chem Phys

January 2025

College of Mechanics and Engineering Science, Hohai University, Nanjing, 211100, China.

Driven by the pressing demand for integration and miniaturization within the terahertz (THz) spectrum, this research introduces an innovative approach to construct chiral structures using dichroism as the target function. This initiative aims to tackle the prevalent issues of single-functionality, narrow application scope, and intricate design in conventional metasurfaces. The proposed multifunctional tunable metasurface employs a graphene-metal hybrid structure to address the critical constraints found in existing designs.

View Article and Find Full Text PDF

Highly electroactive thiazolium [5,4-d]thiazol-2,5-dicarboxylic acid-silver electrochemiluminescent metal-organic frameworks: synthesis, properties and application in glutathione detection.

Mikrochim Acta

January 2025

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi' an, 710069, PR, China.

Thiazolo[5,4-d]thiazole-2,5-dicarboxylic acid (HThz), a thiazolothiazole (TTz) derivative with carboxylic acid groups, was synthesized as a ligand for the creation of five MOFs, each associated with distinct metal ions including Ag, Mn, Co, Zn, and Cu. The cathodic electrochemiluminescence (ECL) of HThz and the resulting MOFs was investigated. HThz was found to generate ECL signals, but this process was heavily reliant on potassium persulfate (KSO) as a co-reactant.

View Article and Find Full Text PDF

Angle-controlled strong and weak coupling in photon molecules.

Sci Rep

January 2025

Terahertz Research Center, School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China.

Strong light-matter coupling occurs when the rate of energy exchange between the electromagnetic mode and the molecular ensemble exceeds the competitive dissipation process. Coupled photon molecules with near-field light-matter interactions may produce new hybridized states when they reach the strong coupling region. Tunable Terahertz (THz) meta materials can be used to design sensors, optical modulators, etc.

View Article and Find Full Text PDF

Photoinduced Fröhlich Interaction-Driven Distinct Electron- and Hole-Polaron Behaviors in Hybrid Organic-Inorganic Perovskites by Ultrafast Terahertz Probes.

ACS Nano

January 2025

School of Information Science and Technology and Department of Optical Science and Engineering and Key Laboratory of Micro and Nano Photonic Structures (MOE), Fudan University, Shanghai 200433, China.

The formation of large polarons resulting from the Fröhlich coupling of photogenerated carriers with the polarized crystal lattice is considered crucial in shaping the outstanding optoelectronic properties in hybrid organic-inorganic perovskite crystals. Until now, the initial polaron dynamics after photoexcitation have remained elusive in the hybrid perovskite system. Here, based on the terahertz time-domain spectroscopy and optical-pump terahertz probe, we access the nature of interplay between photoexcited unbound charge carriers and optical phonons in MAPbBr within the initial 5 ps after excitation and have demonstrated the simultaneous existence of both electron- and hole-polarons, together with the photogenerated carrier dynamic process.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!