Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Monolayer transition metal dichalcogenide lens for high resolution imaging

Schematic of femtosecond laser fabrication of a monolayer TMDC lens. Inset: (i) AFM image of a monolayer TMDC single crystal, and (ii) Schematic of femtosecond laser-induced generation of MOx nanoparticles.

CREDIT
by Han Lin, Zai-Quan Xu, Guiyuan Cao, Yupeng Zhang, Jiadong Zhou, Ziyu Wang, Zhichen Wan, Zheng Liu, Kian Ping Loh, Cheng-Wei Qiu, Qiaoliang Bao, Baohua Jia
Schematic of femtosecond laser fabrication of a monolayer TMDC lens. Inset: (i) AFM image of a monolayer TMDC single crystal, and (ii) Schematic of femtosecond laser-induced generation of MOx nanoparticles. CREDIT by Han Lin, Zai-Quan Xu, Guiyuan Cao, Yupeng Zhang, Jiadong Zhou, Ziyu Wang, Zhichen Wan, Zheng Liu, Kian Ping Loh, Cheng-Wei Qiu, Qiaoliang Bao, Baohua Jia

Abstract:
Lenses are one of the most commonly used optical components in daily life, including eyeglasses, microscopic objectives, magnifying glass, and camera lenses. Conventional lenses are based on the principle of light refraction, using different materials, spherical surfaces and spatial positions to achieve the control of light. The fabrication of conventional lenses including the processes of material selection, cutting, rough grinding, fine grinding, polishing, and testing. In order to minimize the aberrations including the chromatic aberration, spherical aberration and astigmatisms, it is necessary to stack multiple layers of lenses to form compound lenses, leading to the complexity and cumbersomeness of current camera equipment.

Monolayer transition metal dichalcogenide lens for high resolution imaging

Changchun, China | Posted on August 14th, 2020

Therefore, tremendous effort has been devoted into the development of ultrathin flat lenses. Unlike conventional lenses, flat lenses use nanostructures to modulate light. By controlling the optical properties and the spatial position of each nano-element, advanced functions, such as achromatic and aberration-free focusing, high spatial resolution and special focal intensity distributions can be achieved. However, when the material thickness is reduced to the subwavelength scale, the insufficient phase or amplitude modulation based on the intrinsic refractive index and absorption of the materials results in poor lens performance.

In a new paper published in Light Science & Application, a team of scientists, led by Prof. Baohua Jia at Centre for Translational Atomaterials, Swinburne University of Technology, Australia, Prof. Qiaoliang Bao formerly at Monash University, Prof. Chengwei Qiu at National University of Singapore and co-workers have developed an innovative method to fabricate high performance lenses in monolayer two dimensional transitional metal dichalcogenide (TMDC) material by using a femtosecond laser to pattern nanoparticles. The lens has a sub-wavelength resolution and a focusing efficiency of 31%, laying the foundation for ultimately thin optical devices for use in nano-optics and on-chip photonic applications.

Although lenses made from multilayer TMDCs have been demonstrated before, when their thickness is reduced to the sub-nanometer scale, their insufficient phase or amplitude modulation results in focusing efficiencies of less than 1%. The international team discovered that it is possible to generate nanoparticles by using a femtosecond laser beam to interact with the monolayer TMDC material, which is significantly different from the process produced by a continuous wave laser. When the laser pulse is so short that the entire material remains cold after laser process, the nanoparticles can firmly attach to the substrate. The nanoparticles show very strong scattering to modulate the amplitude of light. Therefore, the lens made from the nanoparticles can provide subwavelength resolution and high efficiency, which allows the team to demonstrate diffraction-limited imaging by using the lenses.

Monolayer is the thinnest form of a material, which is the ultimate physical thickness limit. By using the monolayer for the lens fabrication, the process demonstrated in this study consumed the least material meeting the theoretical limitation. More importantly, the femtosecond laser fabrication technique is a one-step simple process, without the requirements of high vacuum or special environment, thus it provides the simplest way to fabricate an ultrathin flat lens. As a result, the lens can be easily integrated into any photonic or microfluidic devices for broad applications.

"We have used the thinnest material in the world to fabricate a flat lens, and prove that the good performance of the ultrathin lens can lead to high resolution imaging. It shows enormous potential in different applications, such as eyeglasses, microscopy lenses, telescopes and camera lenses. It is foreseeable that by using this technique, the weight and size of camera lenses can be significantly reduced in the near future." Said Dr Han Lin, the first author from the Centre for Translational Atomaterials, Swinburne University of Technology.

"We are excited to see unique outcome from femtosecond laser processing 2D materials. It opens up new possibility to fabrication photonic devices using scalable method." Added by Prof. Baohua Jia, Director of Centre for Translational Atomaterials.

"We can integrate the monolayer 2D material lens onto desired devices by simply attaching the material then using a femtosecond laser to perform fabrication. The entire process is simple, and the method is flexible and low cost. Thus, we also see the great application potential of the method." Commented by Prof. Qiaoliang Bao formerly at Monash University.

"We design our lens in such a way that image can be found at different focal planes, with different magnifications. This mechanism can be readily used to develop an optical zoom lens that is required in all cellphone cameras. Currently, lenses with different focal lengths are used to achieve different zoom function. However, our lenses can achieve different zoom rates simply with one design." Prof. Chengwei Qiu from National University of Singapore forecasts.

####

For more information, please click here

Contacts:
Baohua Jia

Copyright © Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences

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 Links

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Daikin Industries becomes OCSiAl shareholder July 27th, 2021

The National Space Society Congratulates Blue Origin and Jeff Bezos for the Spectacular First Crewed Flight of the New Shepard: Well-Tested Suborbital Tourist Rocket Soars to 63 Miles; Opens New Frontiers July 21st, 2021

Unconventional superconductor acts the part of a promising quantum computing platform: If it looks like a duck, swims like a duck and quacks like a duck, then it probably is a duck. July 16th, 2021

Unlocking efficient light-energy conversion with stable coordination nanosheets: Scientists design a high-performance, self-powered, UV photodetector using 2D nanosheets that show record photocurrent stability under air exposure July 16th, 2021

2 Dimensional Materials

Putting functional proteins in their place: Using DNA-based assembly, scientists developed a method for creating designed and biologically active 2-D and 3-D protein arrays, which show promise for applications in structural biology, biomaterials, nanomedicine, and biocatalysis June 25th, 2021

Atomic-scale tailoring of graphene approaches macroscopic world June 18th, 2021

Changing a 2D material's symmetry can unlock its promise: Jian Shi Research Group engineers material into promising optoelectronic June 18th, 2021

Rice lab peers inside 2D crystal synthesis: Simulations could help molecular engineers enhance creation of semiconducting nanomaterials June 11th, 2021

Govt.-Legislation/Regulation/Funding/Policy

The virus trap: Hollow nano-objects made of DNA could trap viruses and render them harmless July 16th, 2021

Scientists create rechargeable swimming microrobots using oil and water July 16th, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

Stress-free path to stress-free metallic films paves the way for next-gen circuitry: Optimized sputtering technique helps minimize stress in tungsten thin films July 4th, 2021

Possible Futures

Daikin Industries becomes OCSiAl shareholder July 27th, 2021

The National Space Society Congratulates Blue Origin and Jeff Bezos for the Spectacular First Crewed Flight of the New Shepard: Well-Tested Suborbital Tourist Rocket Soars to 63 Miles; Opens New Frontiers July 21st, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

Researchers discover a new inorganic material with lowest thermal conductivity ever reported July 16th, 2021

Discoveries

Repairs using light signals: FAU research group develops smart microparticle that identifies defective parts in electrical appliances July 16th, 2021

Removing the lead hazard from perovskite solar cells July 16th, 2021

Scientists create rechargeable swimming microrobots using oil and water July 16th, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

Announcements

Daikin Industries becomes OCSiAl shareholder July 27th, 2021

The National Space Society Congratulates Blue Origin and Jeff Bezos for the Spectacular First Crewed Flight of the New Shepard: Well-Tested Suborbital Tourist Rocket Soars to 63 Miles; Opens New Frontiers July 21st, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

Researchers discover a new inorganic material with lowest thermal conductivity ever reported July 16th, 2021

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

RUDN University chemists obtained an unusual planar nickel complex exhibiting magnetic properties July 16th, 2021

Repairs using light signals: FAU research group develops smart microparticle that identifies defective parts in electrical appliances July 16th, 2021

Scientists create rechargeable swimming microrobots using oil and water July 16th, 2021

Scientists take first snapshots of ultrafast switching in a quantum electronic device: They discover a short-lived state that could lead to faster and more energy-efficient computing devices July 16th, 2021

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

The National Space Society Congratulates Blue Origin and Jeff Bezos for the Spectacular First Crewed Flight of the New Shepard: Well-Tested Suborbital Tourist Rocket Soars to 63 Miles; Opens New Frontiers July 21st, 2021

The virus trap: Hollow nano-objects made of DNA could trap viruses and render them harmless July 16th, 2021

Removing the lead hazard from perovskite solar cells July 16th, 2021

Scientists create rechargeable swimming microrobots using oil and water July 16th, 2021

Photonics/Optics/Lasers

Unlocking efficient light-energy conversion with stable coordination nanosheets: Scientists design a high-performance, self-powered, UV photodetector using 2D nanosheets that show record photocurrent stability under air exposure July 16th, 2021

Repairs using light signals: FAU research group develops smart microparticle that identifies defective parts in electrical appliances July 16th, 2021

Graphene drum: Researchers develop new phonon laser design June 18th, 2021

Researchers tame silicon to interact with light for next-generation microelectronics June 11th, 2021

Research partnerships

Scientists create rechargeable swimming microrobots using oil and water July 16th, 2021

Stress-free path to stress-free metallic films paves the way for next-gen circuitry: Optimized sputtering technique helps minimize stress in tungsten thin films July 4th, 2021

New family of atomic-thin electride materials discovered June 11th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

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