Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Lightening up the nanoscale long-wavelength optoelectronics

a, Schematics of the bow-tie antenna-assisted device. b, The cross-section view of the simulated electric field intensity normalized to incident one marks the power-gain around the nanochannel at 0.3 THz electromagnetic waves. c, The scaling of electric field enhancement derived from FDTD method versus channel length and incident frequency. d, Asymmetric ultrashort channel was fabricated by tilt deposition. e, The near-field images are taken around the slit area using broadband illumination. f, Stereograph of the near-field signal.

CREDIT
by Lin Wang, Li Han, Wanlong Guo, Libo Zhang, Chenyu Yao, Zhiqingzi Chen, Yulu Chen, Cheng Guo, Kaixuan Zhang, Chia-Nung Kuo, Chin Shan Lue, Antonio Politano, Huaizhong Xing, Mengjie Jiang, Xianbin Yu, Xiaoshuang Chen, and Wei Lu
a, Schematics of the bow-tie antenna-assisted device. b, The cross-section view of the simulated electric field intensity normalized to incident one marks the power-gain around the nanochannel at 0.3 THz electromagnetic waves. c, The scaling of electric field enhancement derived from FDTD method versus channel length and incident frequency. d, Asymmetric ultrashort channel was fabricated by tilt deposition. e, The near-field images are taken around the slit area using broadband illumination. f, Stereograph of the near-field signal. CREDIT by Lin Wang, Li Han, Wanlong Guo, Libo Zhang, Chenyu Yao, Zhiqingzi Chen, Yulu Chen, Cheng Guo, Kaixuan Zhang, Chia-Nung Kuo, Chin Shan Lue, Antonio Politano, Huaizhong Xing, Mengjie Jiang, Xianbin Yu, Xiaoshuang Chen, and Wei Lu

Abstract:
Recent years have witnessed rapid development of the infrared photoelectric technology and the growth-up of the format of focal plane array, integration methods, as well as the spectral regime, and has widely implemented in fields including environmental resources exploration, military defenses, space science, and in the near future the field of artificial interconnect of things (AIoT) bench for communication and sensing of all things. However, with the diversity of the environment and the complexity of the features of hidden targets, the short-wave infrared detection is disturbed by the varying environmental conditions. Expanding the wavelength range of infrared detection to cover the electromagnetic spectrum from 30 μm to 3000 μm is of great significance for upgrading the capacity of optoelectronic system, such as all-weather monitoring, target recognition in complex conditions, remote sensing and spectroscopy, as well as security-screening. Existing infrared detection materials and devices are limited by intrinsic dark current and operating temperature, which mainly work in the wavelength below 20 μm under stringent cooling condition, and confront huge-challenges in wavelength extension in terms of refrigeration, power consumption, bulky, and difficulty in high-quality material growth. Therefore, there is an urgent requirement to explore novel materials and device structure beyond traditional routes to meet miniaturized technologies development with room temperature working capability, low-power consumption, and long-wavelength detection.

Lightening up the nanoscale long-wavelength optoelectronics

Changchun, China | Posted on May 13th, 2022

In a new paper published in Light Science & Application, a team of scientists, led by Professor Lin Wang from State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, China, and co-workers have explored a topological semimetal-based photodetector for effectively capturing low-energy photons. Combining multiple detection mechanisms, they developed a hybrid Dirac semimetal photodetector with strong interaction at deep-subwavelength regime of ultrashort-channel and efficient photon-conversion led by symmetry engineering. The superior low-energy band topology of Dirac semimetal and peculiar non-equilibrium manipulation, enable the rectification of terahertz signals in the nanometric regime at room temperature. It is worth mentioning that the device possesses excellent environmental stability, and the photocurrent is efficiently generated across wide spectral regime beyond traditional optical technique. The reported method and technique will open up new possibilities for the facile realization of portable room-temperature low-photon detectors with high sensitivity, fast operation, and low NEP, which have significant advantages over the existing technologies.



The detector integrates PtSe2-class type-II Dirac semimetal as the channel material, and is fully optimized in terms of antenna structure, heterogeneous integration, and unbalanced electrodes. It has excellent detection performance for low-energy photons at room temperature, with responsivity exceeding ∼0.2 A/W and noise-equivalent power (NEP) less than ~38 pW/Hz0.5, as well as superb ambient stability. These scientists summarize the operational principle of their photodetector:

“We provide an alternative photodetecion strategy by efficiently integrating and manipulating at the nanoscale the optoelectronic properties of topological Dirac semimetal PtSe2 and its van der Waals heterostructures, based on the following three principles: (1) Our discovery reveals the achieve stronger light-matter interaction beyond the skin depth regime, which is achieved by titled self-aligned technique; (2) Spontaneous photocurrent is versatile manipulated by breaking the the symmetry of the in-plane barrier, so that the carriers can flow in one direction; (3) To suppress the dark current and achieve room temperature rectification, a PtSe2-graphene heterojunction was constructed benefiting from congenital nature of the van der Waals interaction.” Said Prof. Wang, the first author of the work.



“The asymmetrical electrodes forming the nanoscale photoactive region can funnel efficiently the low-energy photons and enable intensive field enhancement, giving rise to a Seebeck electromotive force and a preferential flow of nonequilibrium hot carriers. The maximum responsivity can reach 0.2A/W at zero bias.” they added.



“Considering the superior ambient stability and the excellent potential for scalable synthesis of PtSe2, our work opens new possibilities for the facile realization of portable room-temperature, low-photon detectors, with high sensitivity, fast operation, and low NEP, with great advantages compared to current technologies. It is expected to break through the bottleneck of traditional low-energy photon detection.” the scientists forecast.

####

For more information, please click here

Contacts:
Yaobiao Li
Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Office: 86-431-861-76851
Expert Contact

Lin Wang
Shanghai Institute of Technical Physics, Chinese Academy of Sciences

Copyright © Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

HKUST researchers develop a novel integration scheme for efficient coupling between III-V and silicon November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Rice turns asphaltene into graphene for composites: ‘Flashed’ byproduct of crude oil could bolster materials, polymer inks November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Internet-of-Things

New chip ramps up AI computing efficiency August 19th, 2022

Thin-film, high-frequency antenna array offers new flexibility for wireless communications November 5th, 2021

MXene-GaN van der Waals metal-semiconductor junctions for high performance photodetection September 24th, 2021

CEA-Leti Announces EU Project to Create Dynamically Programmable Wireless 6G Environments: RISE-6G Collaboration Will Develop Technology for Reconfigurable Intelligent Surfaces and Ensure Energy Efficiency, Localization Accuracy and Privacy February 10th, 2021

Govt.-Legislation/Regulation/Funding/Policy

NIST’s grid of quantum islands could reveal secrets for powerful technologies November 18th, 2022

A new experiment pushes the boundaries of our understanding of topological quantum matter: The behavior of bosonic particles observed in a magnetic insulator fabricated from ruthenium chloride can be explained by a relatively new and little-studied physics phenomenon called the B November 18th, 2022

Trial by wind: Testing the heat resistance of carbon fiber-reinforced ultra-high-temperature ceramic matrix composites: Researchers use an arc-wind tunnel to test the heat resistance of carbon fiber reinforced ultra-high-temperature ceramic matrix composites November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Possible Futures

HKUST researchers develop a novel integration scheme for efficient coupling between III-V and silicon November 18th, 2022

NIST’s grid of quantum islands could reveal secrets for powerful technologies November 18th, 2022

A new experiment pushes the boundaries of our understanding of topological quantum matter: The behavior of bosonic particles observed in a magnetic insulator fabricated from ruthenium chloride can be explained by a relatively new and little-studied physics phenomenon called the B November 18th, 2022

Trial by wind: Testing the heat resistance of carbon fiber-reinforced ultra-high-temperature ceramic matrix composites: Researchers use an arc-wind tunnel to test the heat resistance of carbon fiber reinforced ultra-high-temperature ceramic matrix composites November 18th, 2022

Optical computing/Photonic computing

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Semi-nonlinear etchless lithium niobate waveguide with bound states in the continuum November 4th, 2022

Spin photonics to move forward with new anapole probe November 4th, 2022

Discoveries

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Rice turns asphaltene into graphene for composites: ‘Flashed’ byproduct of crude oil could bolster materials, polymer inks November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Announcements

HKUST researchers develop a novel integration scheme for efficient coupling between III-V and silicon November 18th, 2022

NIST’s grid of quantum islands could reveal secrets for powerful technologies November 18th, 2022

A new experiment pushes the boundaries of our understanding of topological quantum matter: The behavior of bosonic particles observed in a magnetic insulator fabricated from ruthenium chloride can be explained by a relatively new and little-studied physics phenomenon called the B November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Rice turns asphaltene into graphene for composites: ‘Flashed’ byproduct of crude oil could bolster materials, polymer inks November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Military

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Rice turns asphaltene into graphene for composites: ‘Flashed’ byproduct of crude oil could bolster materials, polymer inks November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Environment

New $1.25 million research project will map materials at the nanoscale: The work can lead to new catalysts and other compounds that could be applicable in a range of areas including quantum science, renewable energy, life sciences and sustainability October 28th, 2022

Scientists have proposed a new material for perovskite solar cells: It is cheaper its analogues, easier to manufacture and to modify October 28th, 2022

Scientists count electric charges in a single catalyst nanoparticle down to the electron: Tenfold improvement in the sensitivity of electron holography reveals the net charge in a single platinum nanoparticle with a precision of just one electron, providing fundamental informatio October 14th, 2022

Rutgers researchers develop method with single-molecule precision to engineer enzyme ‘stickiness’: The method aids in optimizing enzymes or proteins ‘stickiness’ for diverse biotechnological applications October 14th, 2022

Aerospace/Space

Trial by wind: Testing the heat resistance of carbon fiber-reinforced ultra-high-temperature ceramic matrix composites: Researchers use an arc-wind tunnel to test the heat resistance of carbon fiber reinforced ultra-high-temperature ceramic matrix composites November 18th, 2022

Surface microstructures of lunar soil returned by Chang’e-5 mission reveal an intermediate stage in space weathering process September 30th, 2022

Strain-sensing smart skin ready to deploy: Nanotube-embedded coating detects threats from wear and tear in large structures July 15th, 2022

Boron nitride nanotube fibers get real: Rice lab creates first heat-tolerant, stable fibers from wet-spinning process June 24th, 2022

Grants/Sponsored Research/Awards/Scholarships/Gifts/Contests/Honors/Records

A new experiment pushes the boundaries of our understanding of topological quantum matter: The behavior of bosonic particles observed in a magnetic insulator fabricated from ruthenium chloride can be explained by a relatively new and little-studied physics phenomenon called the B November 18th, 2022

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Rice turns asphaltene into graphene for composites: ‘Flashed’ byproduct of crude oil could bolster materials, polymer inks November 18th, 2022

How “2D” materials expand: New technique that accurately measures how atom-thin materials expand when heated could help engineers develop faster, more powerful electronic devices November 18th, 2022

Photonics/Optics/Lasers

HKUST researchers develop a novel integration scheme for efficient coupling between III-V and silicon November 18th, 2022

An on-chip time-lens generates ultrafast pulses: New device opens the doors to applications in communication, quantum computing, astronomy November 18th, 2022

Researchers at Purdue unlock light-matter interactions on sub-nanometer scales, leading to ‘picophotonics’ November 18th, 2022

Semi-nonlinear etchless lithium niobate waveguide with bound states in the continuum November 4th, 2022

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project