Photonics Spectra: LEDs This is the syndication feed for Photonics Spectra: LEDs. https://www.photonics.com/Splash.aspx?Tag=LEDs Fri, 29 Mar 2024 03:29:02 GMT Wed, 20 Mar 2024 07:00:00 GMT 1800 Polar Light Appoints CEO; LightPath Adds Vice President of Sales: People in the News: 3/20/24
MicroLED technology developer Polar Light Technologies has named Oskar Fajerson as CEO. Fajerson has a background in product management, sales, and marketing and a degree in material physics from KTH Royal Institute of Technology in Stockholm. He has held senior positions at a wide range of high-tech companies during their growth phases, including eye-tracking company Tobii.

Oskar Fajerson. Courtesy of Polar Light Technologies. ORLANDO, Fla. — LightPath Technologies, a manufacturer and integrator of optical and infrared technologies, has named Jason Messerschmidt as vice president of sales. Messerschmidt joined LightPath Technologies from FLIR Systems, most recently serving as senior director of sales for US Industrial...]]>
https://www.photonics.com/Articles/Polar_Light_Appoints_CEO_LightPath_Adds_Vice/p5/a69826 A69826 Wed, 20 Mar 2024 07:00:00 GMT
All-Optical Network Bridges Space, Air, Underwater Environments
Researchers have developed an all-light communication network that enables seamless connectivity across space, air and underwater environments. The new network design combines different types of light sources to ensure connectivity across environments.

“In today’s world, data transmission is critical for communication, navigation, emergency response, research and commercial activities,” said research team leader Yongjin Wang from Nanjing University of Posts and Telecommunications and Suzhou Lighting Chip Monolithic Optoelectronics Technology Co. Ltd. “This new wireless network enables uninterrupted connectivity across environments, facilitating two-way real-time data transmission between the network nodes that...]]>
https://www.photonics.com/Articles/All-Optical_Network_Bridges_Space_Air/p5/a69787 A69787 Thu, 07 Mar 2024 07:00:00 GMT
Measurement Tool Helps Optimize Semiconductors for Optoelectronics
Devices such as solar cells, transistors, detectors, sensors, and LEDs are made with semiconductor materials that have charge carriers that are released when the carriers are hit with light.

Determining the transport properties of a semiconductor’s charge carriers can help researchers predict how effective the material will be for an optoelectronics application. Until now, the parameters of the transport properties in minority and majority charge carriers in semiconductors have been determined by using different measurement methods for each type of charge.

To enable efficient, complete characterization of semiconductors, scientists at Helmholtz-Zentrum Berlin (HZB) developed a method that records 14 different parameters...]]>
https://www.photonics.com/Articles/Measurement_Tool_Helps_Optimize_Semiconductors/p5/a69765 A69765 Tue, 27 Feb 2024 07:00:00 GMT
UV-LED Photolithography Imparts Micro Features
Technologies like integrated signal distributing, processing, and sensing networks require basic optical elements such as waveguides, splitters, gratings, and optical switches to be miniaturized. This poses challenges, especially for curved elements such as bends and ring resonators, which require an especially high resolution and lower sidewall roughness.

There are a number of methods to achieve subwavelength high-resolution manufacturing, though they tend to be costly, complex, and time-consuming. Nanoimprint lithography is promising as an approach to efficient high-resolution manufacturing, but it requires high-quality master stamps often produced with electron beam lithography.
An illustration of the UV-LED-based microscope...]]>
https://www.photonics.com/Articles/UV-LED_Photolithography_Imparts_Micro_Features/p5/a69645 A69645 Thu, 18 Jan 2024 07:00:00 GMT
Perovskite-based LEDs Pave Way to Novel Thin-Film Laser Diodes
A research team from imec has developed perovskite-based LEDs that emit light 1000× brighter than OLEDs. According to the researchers, the advancement is a pivotal milestone toward a perovskite injection laser, which promises advances in image projection, environmental sensing, and medical diagnostics, among other applications.

Perovskite materials are well known for their potential in photovoltaic technology, though perovskites also carry potential as a light amplifier for thin-film laser diodes. Perovskites’ optoelectrical properties, low-cost processability, and efficient charge transport make it a strong candidate for light emission applications like LEDs.
Researchers at imec developed perovskite-based LEDs capable...]]>
https://www.photonics.com/Articles/Perovskite-based_LEDs_Pave_Way_to_Novel_Thin-Film/p5/a69625 A69625 Tue, 09 Jan 2024 07:00:00 GMT
Targeted Spectroscopy Can Improve Treatment of Eye Disease
A targeted spectroscopy system developed at Zilia Inc., by a team led by professor Dominic Sauvageau from the University of Alberta, enables concurrent imaging of the eye fundus — a region at the back of the eye — and analysis of high-quality spectra. The system, which holds advantages over typical fundus color imaging and optical coherence, can be used to assess a range of ocular conditions, from oxygenation in glaucoma and diabetic retinopathy to photo-oxidation and photodegradation in age-related macular degeneration.

The spectroscopy system takes detailed images of the eye fundus in real time while measuring the spectral profile of a small target region. The position of the device can be readjusted easily without...]]>
https://www.photonics.com/Articles/Targeted_Spectroscopy_Can_Improve_Treatment_of/p5/a69617 A69617 Fri, 05 Jan 2024 07:00:00 GMT
Micro-LED Assembly Gets Boost from Vacuum-Assisted Transfer Printing
Compared to conventional light sources, such as OLEDs and LCDs, micro-LEDs — inorganic LED chips <100 μm in size — show superior reliability, stability, and optoelectronic properties. Despite these advantages, their deployment into next-generation display technology is encumbered by manufacturing challenges.

Mass transfer with high selectivity and controllability is essential for rearranging micro-LED dies from a growth substrate onto a final substrate with the desired layout and precise alignment needed to reduce the final product costs. However, existing transfer methods have many challenges, including the need for additional adhesives, misalignment, low transfer yield, and chip damage.
A conceptual drawing of...]]>
https://www.photonics.com/Articles/Micro-LED_Assembly_Gets_Boost_from/p5/a69589 A69589 Tue, 02 Jan 2024 07:00:00 GMT
Foxconn Synchs with Porotech for Micro-LED Commercialization
According to an announcement, the collaboration aims to yield an end product targeting ultrahigh density and energy-efficient micro-LED micro-displays for augmented reality (AR) applications, as...]]>
https://www.photonics.com/Articles/Foxconn_Synchs_with_Porotech_for_Micro-LED/p5/a69559 A69559 Thu, 21 Dec 2023 07:00:00 GMT
Optofluidics Yields a Better Reflective Display
With the advent of the IoT, there is increased need to display large amounts of information to people quickly and without distortion in all types of lighting conditions. Though transmissive and emissive displays such as LEDs and OLEDs are widely used, reflective displays are more capable of providing comfortable readability and clear vision in outdoor strong-light environments with low energy consumption. Examples of commercially available reflective displays include electrophoretic displays (EPDs), interferometric modulator displays, electrowetting displays, cholesteric liquid crystal displays, and photonic crystal displays.

According to researchers led by the International Joint Laboratory of Optofluidic Technology and System at...]]>
https://www.photonics.com/Articles/Optofluidics_Yields_a_Better_Reflective_Display/p5/a69527 A69527 Tue, 12 Dec 2023 07:00:00 GMT
Researchers Triple Carbon Nanotube Yield with Chemical Vapor Deposition
Scientists at Skolkovo Institute of Science and Technology (Skoltech) have found a way to increase the yield of single-walled carbon nanotube film production. The materials are promising for solar cells, LEDs, flexible and transparent electronics, smart textiles, medical imaging, toxic gas detectors, filtration systems, and more.

By adding hydrogen gas and carbon monoxide to the reaction chamber, the team managed to almost triple carbon nanotube yield compared to growth promoters, without compromising quality. Until now, low yield has been the bottleneck limiting the potential of that manufacturing technology, otherwise known for high product quality.

Conceptually, nanotubes are a form of carbon in which sheets of graphene are...]]>
https://www.photonics.com/Articles/Researchers_Triple_Carbon_Nanotube_Yield_with/p5/a69498 A69498 Thu, 30 Nov 2023 07:00:00 GMT
Automotive Lighting Turns a Corner
Studies cited by the Independent Institute for Highway Safety (IIHS) show that using automatic switching on old-fashioned high beams whenever possible reduces nighttime automotive crashes with animals, pedestrians, and unlit bicycles or cars by 26%. With the advent of inexpensive and rugged visible-range LEDs and other photonic technologies, automobile lighting is rapidly improving both inside and outside the vehicle.


The need for automobiles to illuminate the road runs counter to minimizing glare for other motorists. With the development of headlamps comprising cameras and individually addressable pixels, systems can now actively spare other motorists while still illuminating the road at night. Courtesy of General Motors.
...]]>
https://www.photonics.com/Articles/Automotive_Lighting_Turns_a_Corner/p5/a69388 A69388 Wed, 01 Nov 2023 15:58:00 GMT
Nobel Prize in Chemistry Recognizes Quantum Dot Pioneers
Moungi Bawendi, Louis Brus, and Alexei Ekimov have been awarded the 2023 Nobel Prize in chemistry for the discovery and development of quantum dots, which are nanoparticles small enough that their size determines their properties. These discoveries have led to advancements in nanotechnology that are now used in products such as televisions, LED lamps, QLED screens, and technology that allows biochemists and doctors to map biological tissue.

Bawendi, Brus, and Ekimov were awarded 11 million SEK ($989,495) to be shared equally.
Alexei Ekimov, formerly the chief scientist at Nanocrystals Technology Inc. Courtesy of Niklas Elmehed, Nobel Prize Outreach.
In the early 1980s, Alexei Ekimov succeeded in creating size-dependent quantum...]]>
https://www.photonics.com/Articles/Nobel_Prize_in_Chemistry_Recognizes_Quantum_Dot/p5/a69374 A69374 Wed, 04 Oct 2023 11:11:54 GMT
ams OSRAM Receives €300M, Details Refinancing Plan
Austria-based ams OSRAM will receive more than €300 million ($317.3 million) in funding over the next five years from Germany’s Federal Ministry for Economic Affairs and Climate Action and the Free State of Bavaria. The Important Project of Common European Interest (IPCEI) funding will support the company in making its own investments in the R&D of innovative optoelectronic components at its Regensburg location, which is home to ams OSRAM's Osram Opto Semiconductors GmbH.

The company said that its main investment beyond activities supporting R&D pursuits will target manufacturing processes, creating 400 jobs. ams OSRAM will invest in new cleanroom and laboratory facilities for research, development, and pilot...]]>
https://www.photonics.com/Articles/ams_OSRAM_Receives_300M_Details_Refinancing_Plan/p5/a69355 A69355 Wed, 27 Sep 2023 07:00:00 GMT
Micro-LEDs Heighten Color and Definition for Immersive Displays
High resolution and high definition are key to delivering a realistic visual experience in augmented reality (AR) and other immersive technologies. Inexpensive micro-LEDs that enable full-color imaging at high resolution could help immersive displays reach their full potential.

A design for gallium indium nitride (GaInN)-based micro-LEDs, developed by researchers at Meijo University and King Abdullah University of Science and Technology (KAUST), could play a role in advancing metaverse applications to the next level by improving the definition, resolution, and saturation of their colors.
Display trends and targets of the micro-LED array technology. Courtesy of Motoaki Iwaya/Meijo University.
GaInN semiconductors are used to...]]>
https://www.photonics.com/Articles/Micro-LEDs_Heighten_Color_and_Definition_for/p5/a69324 A69324 Thu, 14 Sep 2023 07:00:00 GMT
Tomography Techniques Recover Scattered Light to Speed 3D Imaging
Researchers at Boston University (BU) developed two new IDT methods — annular IDT (aIDT) and multiplexed IDT (mIDT) — to boost the image acquisition speed in 3D imaging techniques. Annular IDT uses an LED ring that matches the objective’s numerical aperture (NA). Multiplexed IDT uses multiple LEDs that illuminate the sample simultaneously. Both IDT methods improve 3D imaging speed enough to enable visualization...]]>
https://www.photonics.com/Articles/Tomography_Techniques_Recover_Scattered_Light_to/p5/a69267 A69267 Thu, 24 Aug 2023 07:00:00 GMT
GaN-Based LEDs Achieve High-Frequency Visible Light Communications
As the large-scale, commercial use of 5G networks has grown, so has the need for broader bandwidth to accommodate high-speed communications. To meet the resource needs of the post-5G and 6G eras, researchers at Fudan University are exploring visible light communication (VLC) to achieve data rates at the terabit-per-second level.

The researchers use multicolor LED arrays with wavelength division multiplexing (WDM) technology. They enhance the efficiency of the long-wavelength GaN-based LED units, especially in the green and yellow wavelengths, by using a V-pit structure. According to the Fudan team, the GaN-based LED array system for VLC demonstrates significantly improved data rates compared with earlier research.
(a): In the...]]>
https://www.photonics.com/Articles/GaN-Based_LEDs_Achieve_High-Frequency_Visible/p5/a69264 A69264 Wed, 23 Aug 2023 07:00:00 GMT
Optogenetics Reveals Relationship Between Brain and Gut Health
The brain-gut connection is known to influence hunger and mood, and it has also been associated with neurological and other disorders. To explore the signaling that occurs between these two organs, scientists at MIT integrated light sources, thermal sensors, microelectronics, and microfluidics in a device that enables stable bioelectronic interfaces with the brain and gastrointestinal tract in mice.

“To be able to perform gut optogenetics and then measure the effects on brain function and behavior, which requires millisecond precision, we needed a device that didn’t exist. So, we decided to make it,” researcher Atharva Sahasrabudhe said.

The multifunctional, microelectronic device provides wireless modulation...]]>
https://www.photonics.com/Articles/Optogenetics_Reveals_Relationship_Between_Brain/p5/a69126 A69126 Wed, 28 Jun 2023 07:00:00 GMT
Ultrasmall Silicon LED Enables High-Resolution Integrated Imaging
Researchers at the Singapore-MIT Alliance for Research and Technology (SMART) developed a CMOS-based silicon LED that, though smaller than a wavelength, emits light at an intensity comparable to much larger silicon LEDs. In a separate study, the researchers used their LED as the illumination source in an in-line, lensless, centimeter-scale, all-silicon, holographic microscope.

They also developed an untrained deep neural network to perform holographic image reconstruction. They then used the deep neural networking algorithm to reconstruct objects measured by the microscope, including plant seeds and tissue samples.

By embedding a physics model within the neural network algorithm, the researchers eliminated the need for training...]]>
https://www.photonics.com/Articles/Ultrasmall_Silicon_LED_Enables_High-Resolution/p5/a69021 A69021 Mon, 22 May 2023 07:00:00 GMT
Mojo Vision Raises $22.4M to Bring Micro-LED Tech to Market
The company also appointed Nikhil Balram CEO. Balram previously led the display group at Mojo Vision.

Mojo Vision’s core technology centers on its proprietary high-performance quantum dot technology and encompasses a high-efficiency quantum dot ink and efficient blue micro-LED devices...]]>
https://www.photonics.com/Articles/Mojo_Vision_Raises_224M_to_Bring_Micro-LED_Tech/p5/a68914 A68914 Thu, 06 Apr 2023 00:00:00 GMT
Ultrafast Beam-Steering Achieved for Incoherent Light
A research team at Sandia National Laboratories has demonstrated a technique that dynamically steers light pulses from conventional incoherent light sources. The ability to control incoherent light with a semiconductor device could allow low-power, low-cost sources such as LEDs or flashlight bulbs to replace laser beams in technologies such as holograms, remote sensing, self-driving cars, and high-speed communication.

So-called incoherent light, which is emitted by sources such as incandescent light bulbs and LEDs, takes its name because the photons are emitted with different wavelengths and in a random fashion. A beam of light from a laser, so-called coherent light, does not spread and diffuse because the photons have the same...]]>
https://www.photonics.com/Articles/Ultrafast_Beam-Steering_Achieved_for_Incoherent/p5/a68899 A68899 Tue, 04 Apr 2023 07:00:00 GMT