Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

IR Absorption Frequency: Hybridization01:21

IR Absorption Frequency: Hybridization

741
Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
741
IR Frequency Region: X–H Stretching01:24

IR Frequency Region: X–H Stretching

1.0K
In IR spectroscopy, signals produced by the X−H bonds (such as C−H, O−H, or N−H) can be observed in the frequency range of  2700–4000 cm–1. The C−H stretching vibration forms sharp bands in the region 2850–3000 cm–1. The presence of the O−H stretching vibration leads to the forming of an absorption band in the frequency range 3650–3200 cm−1. At the same time, N−H stretching can be confirmed by absorption bands in...
1.0K
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

3.8K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
3.8K
IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

1.0K
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
1.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Resonant Gas Sensing in the Terahertz Spectral Range Using Two-Wire Phase-Shifted Waveguide Bragg Gratings.

Sensors (Basel, Switzerland)·2023
Same author

Unleashing the piezoelectric potential of PVDF: a study on phase transformation from gamma (γ) to beta (β) phase through thermal contact poling.

RSC advances·2023
Same author

Continuous fabrication of polarization maintaining fibers via an annealing improved infinity additive manufacturing technique for THz communications.

Optics express·2023
Same author

Add drop multiplexers for terahertz communications using two-wire waveguide-based plasmonic circuits.

Nature communications·2022
Same author

Infinity additive manufacturing of continuous microstructured fiber links for THz communications.

Scientific reports·2022
Same author

Cellular effects of terahertz waves.

Journal of biomedical optics·2021

Related Experiment Video

Updated: Aug 25, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

8.6K

Photonics based frequency hopping spread spectrum system for secure terahertz communications.

Kathirvel Nallappan, Maksim Skorobogatiy

    Optics Express
    |October 14, 2022
    PubMed
    Summary

    This study introduces a photonics-based terahertz (THz) system using frequency hopping spread spectrum (FHSS) to combat jamming. The THz FHSS technique effectively mitigates single/multi-tone jamming attacks in high-speed wireless communications.

    More Related Videos

    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.1K
    Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
    10:54

    Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

    Published on: July 8, 2013

    15.0K

    Related Experiment Videos

    Last Updated: Aug 25, 2025

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    8.6K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.1K
    Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
    10:54

    Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

    Published on: July 8, 2013

    15.0K

    Area of Science:

    • Physics
    • Electrical Engineering
    • Optical Communications

    Background:

    • The terahertz (THz) spectrum (100 GHz-10 THz) is crucial for future high-speed wireless communication systems.
    • The increasing availability of high-power THz sources necessitates the development of robust anti-jamming solutions.
    • Jamming attacks pose a significant threat to the integrity of THz communication links.

    Purpose of the Study:

    • To present a photonics-based THz communication system.
    • To demonstrate the efficacy of the frequency hopping spread spectrum (FHSS) technique against jamming attacks.
    • To evaluate the performance of THz FHSS in real-time communication scenarios.

    Main Methods:

    • Utilized a photonics-based THz communication system operating between 110 GHz-170 GHz.
    • Employed distributed feedback lasers to tune THz carrier frequencies for FHSS.
    • Demonstrated the THz FHSS technique in both wireless and THz-fiber-based links, transmitting a 6 Gbps NRZ signal over 1.75 m.

    Main Results:

    • The frequency tuning range of the lasers decreased with increased scanning rates.
    • The bit error rate (BER) in the THz FHSS system was experimentally found to be the time average of individual carrier frequencies.
    • The system demonstrated resilience against single/multi-tone jamming attacks.

    Conclusions:

    • The proposed photonics-based THz FHSS technique offers a novel and compact solution against jamming.
    • Integration with forward error correction codes and tunable filters can further enhance system performance.
    • This approach is suitable for securing high-bit rate THz communications.