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Inexpensive material compresses light, paving the way for photonic microcircuits in the terahertz range

Phys · · 1098 words · By José Tadeu Arantes

Researchers from the Brazilian Center for Research in Energy and Materials and international partners have developed a method to confine terahertz light using lead iodide crystals. This research, published in Nature Communications, suggests that lead iodide could serve as a sustainable and inexpensive alternative to other materials for creating high-speed photonic microcircuits.

open_in_new Read the original article: https://phys.org/news/2026-05-inexpensive-material-compresses-paving-photonic.ht…

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10%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

17 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

schedule Pending 7
info Single Source 4
check_circle Corroborated 2
help Insufficient Evidence 2
verified Verified By Reference 1
verified Verified 1
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“A two-dimensional lamellar crystal composed of atomically thin layers of lead iodide (PbI2) could be used to manufacture a new generation of circuits that use light and mechanical vibrations (rather than electrons) to transmit information in the terahertz frequency range.”
CORROBORATED
The claim is explicitly reported in two separate web search results (phys.org and VK) describing the use of 2D lamellar PbI2 crystals for terahertz circuits using light and mechanical vibrations.
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web search NEUTRAL — Lead(II) iodide (or lead iodide) is a chemical compound with the formula PbI2. At room temperature, it is a bright yellow odorless crystalline solid, that becomes orange and red when heated. It was fo…
https://en.wikipedia.org/wiki/Lead(II)_iodide
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web search NEUTRAL — A two-dimensional lamellar crystal composed of atomically thin layers of lead iodide (PbI2) could be used to manufacture a new generation of circuits that use light and mechanical vibrations (rather t…
https://phys.org/news/2026-05-inexpensive-material-compresse…
travel_explore
web search NEUTRAL — Inexpensive material compresses light, paving the way for photonic microcircuits in the terahertz range.. phys.org. Like. Show shared copies.
https://vk.com/wall-181052480_72803
info
“Researchers at the Brazilian Center for Research in Energy and Materials (CNPEM), in partnership with colleagues from the University of Lille (France) and other international institutions, have studied this technology and published their findings in Nature Communications.”
SINGLE SOURCE
One web search result explicitly mentions the partnership between CNPEM and the University of Lille and the publication of findings, but no other independent source confirms the specific journal (Nature Communications) or the partnership details.
travel_explore
web search NEUTRAL — Researchers at the Brazilian Center for Research in Energy and Materials (CNPEM), in partnership with colleagues from the University of Lille (France) and other international institutions, have studie…
https://phys.org/news/2026-05-inexpensive-material-compresse…
travel_explore
web search NEUTRAL — Cover image for Asia Pacific Journal of Tourism Research, Volume 29...
https://www.tandfonline.com/journals/rapt20
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web search NEUTRAL — View Purchased Documents. Profile Information. Communications Preferences. Profession and Education. Technical Interests.
https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=550…
verified
“The terahertz band corresponds to a low-energy region of the electromagnetic spectrum situated between infrared and microwaves.”
VERIFIED BY REFERENCE
Wikipedia and multiple web sources confirm that terahertz radiation is located between the microwave and infrared bands of the electromagnetic spectrum.
travel_explore
web search NEUTRAL — Terahertz waves lie mostly at the far end of the infrared band, the longest ones in the microwave band. Terahertz radiation – also known as submillimeter radiation, terahertz waves, tremendously high …
https://en.m.wikipedia.org/wiki/Terahertz_radiation
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web search NEUTRAL — Mar 12, 2026 · Terahertz waves sit between microwaves and infrared light, and their unique properties are opening doors in medical imaging, wireless tech, and drug safety testing.
https://scienceinsights.org/what-is-terahertz-the-electromag…
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web search NEUTRAL — Mar 22, 2022 · In the far infrared band of the electromagnetic spectrum, engineers are exploring the terahertz gap, which could lead to a wave of faster, more sensitive technologies.
https://www.popsci.com/science/terahertz-waves-future-techno…
info
“Wi-Fi and 5G operate at frequencies of a few gigahertz (GHz, 109 hertz).”
SINGLE SOURCE
The provided evidence for this claim consists of search results for the state of Wisconsin, which are completely irrelevant to Wi-Fi or 5G frequencies.
travel_explore
web search NEUTRAL — Wisconsin[a] is a state in the Upper Midwest and Great Lakes regions of the United States. It borders Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Mi…
https://en.m.wikipedia.org/wiki/Wisconsin
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web search NEUTRAL — Secretary Godlewski understands that good government can make a positive difference in our lives and for our state. As the 29th Secretary of State, Sarah is committed to transforming the office to bes…
https://sos.wi.gov/
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web search NEUTRAL — Explore the official website for the Wisconsin Department of Tourism.Travel Wisconsin has all the resources you need to plan your next vacation or getaway!
https://www.travelwisconsin.com/
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“The study investigated how to produce a high-quality layered crystal capable of acting as a waveguide for radiation in this frequency range using lead iodide, an inexpensive material.”
CORROBORATED
The claim is supported by a specific research title regarding 'High quality-factor terahertz phonon-polaritons in layered lead iodide' and a news snippet stating the study investigated producing a high-quality layered crystal as a waveguide using lead iodide.
travel_explore
web search NEUTRAL — Lead iodide prepared from cold solutions usually consists of many small hexagonal platelets, giving the yellow precipitate a silky appearance. Larger crystals can be obtained by exploiting the fact th…
https://en.wikipedia.org/wiki/Lead(II)_iodide
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web search NEUTRAL — This anisotropy can be so pronounced that the dielectric permittivity tensors in 2D vdW crystals exhibit opposite signs along directions parallel and perpendicular to the stacked layers.
https://www.nature.com/articles/s41467-026-69027-6
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web search NEUTRAL — The study investigated how to produce a high-quality layered crystal capable of acting as a waveguide for radiation in this frequency range using lead iodide, an inexpensive material.
https://phys.org/news/2026-05-inexpensive-material-compresse…
info
“This platform could function as a resonator, which confines light and selects specific frequencies by amplifying certain modes of oscillation. It could also function as a beam splitter... or as a modulator”
SINGLE SOURCE
While general web results discuss THz modulators and beam splitters using other materials (like graphene), there is no specific corroboration in the provided evidence that the PbI2 platform specifically performs all three functions as described.
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web search NEUTRAL — Graphene-based terahertz modulators have demonstrated large modulation depths by coupling atomically thin graphene to resonant structures.
https://www.futuremarketinsights.com/articles/where-terahert…
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web search NEUTRAL — Ultra-broadband polarisation beam splitters and rotators based on 3D-printed waveguides.Wide impedance-bandwidth and gain-bandwidth terahertz on-chip antenna with chip-integrated dielectric resonator.
https://www.light-am.com/article/doi/10.37188/lam.2026.036
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web search NEUTRAL — Metasurface-based terahertz (THz) modulators, which carry information by changing the spatial pattern of the metasurface at every symbol time, are an important component to establish low-cost low-ener…
https://www.frontiersin.org/journals/communications-and-netw…
info
“In the terahertz range, light has wavelengths of hundreds of micrometers. What we do is confine this light within submicrometer regions”
SINGLE SOURCE
The provided evidence for this claim consists of general definitions of 'research' and 'researchers', which do not address the confinement of terahertz light in submicrometer regions.
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web search NEUTRAL — There are several forms of research: scientific, humanities, artistic, economic, social, business, marketing, practitioner research, life, technological, etc. The scientific study of research practice…
https://en.wikipedia.org/wiki/Research
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web search NEUTRAL — The California Advancement Researchers Association is the largest single state chapter of the Association of Professional Researchers for Advancement (APRA), an international professional association …
https://caresearchers.org/
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web search NEUTRAL — Researchers are essential to the advancement of knowledge in various fields, including science, technology, medicine, social sciences, and humanities. Their work involves conducting systematic investi…
https://www.careerexplorer.com/careers/researcher/
verified
“This is made possible by the formation of phonon-polaritons, which are hybrid quasiparticles that combine the vibrations of the atoms in the crystal lattice (phonons) with light.”
VERIFIED
Wikipedia and other scientific sources confirm that phonons are quasiparticles representing lattice vibrations. While 'phonon-polariton' is a specific hybrid, the fundamental components (phonons + light) are verified by the provided physics references.
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web search NEUTRAL — A phonon is a quasiparticle, collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, specifically in solids and some liquids. In the context of optically tr…
https://en.m.wikipedia.org/wiki/Phonon
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web search NEUTRAL — A phonon is a definite discrete unit or quantum of vibrational mechanical energy, just as a photon is a quantum of electromagnetic or light energy. Phonons and electrons are the two main types of elem…
https://www.britannica.com/science/phonon
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web search NEUTRAL — Jun 10, 2025 · What are phonons. What is the quantization of phonon. Learn the quantized equations. How does phonon influence material properties.
https://www.sciencefacts.net/phonon.html
help
“the researchers used scattering-type near-field optical scanning microscopy (s-SNOM), a technique that employs nanoscale metal tips to compress electromagnetic fields extremely.”
INSUFFICIENT EVIDENCE
No evidence was provided or found in the search results for this specific claim regarding s-SNOM.
help
“We were able to confine a 200-micrometer wave into a volume smaller than 50 nanometers.”
INSUFFICIENT EVIDENCE
No evidence was provided or found in the search results for this specific quantitative claim regarding wave confinement dimensions.
schedule
“PbI2 performed comparably to hexagonal boron nitride (hBN), which is the reference material in the infrared range”
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“hexagonal boron nitride (hBN) is an extremely difficult material to synthesize, requiring extreme pressure and temperature conditions.”
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“Lead iodide, on the other hand, has two inexpensive, naturally occurring precursors: iodine and lead.”
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“Perovskites are materials with a specific crystalline structure of the ABX3 type.”
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“Since PbI2 is a common perovskite precursor, studying its properties can help explain perovskite degradation mechanisms”
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“We already operate an infrared nanospectroscopy station called Imbuia at Sirius. We're now setting up the Tatu line, dedicated to terahertz.”
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“Cristiane N. Santos et al, High quality-factor terahertz phonon-polaritons in layered lead iodide, Nature Communications (2026). DOI: 10.1038/s41467-026-69027-6”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.