excimer laser中文

The Cornell deep-ultraviolet laser is optically pumped, meaning it produces certain requirements for lasing by inputting photons into the device. The next step in the research, according to Jena, is using the same materials platform to realize a laser that is driven by an electrical current from a battery – a more practical energy source for commercially available light-emitting devices.

Our software generates complex interference patterns - called holograms - based on input data from games engines and other 3D content sources. These engineer light waves to create fully 3D images and scenes. The hologram interference pattern that we calculate is a complete representation of the scene, containing all colour, texture and 3D cues needed by the human visual system.

Rubylaser

Developed world first methods for displaying 3D holograms through a pupil replicating waveguide, enabling products featuring a large viewable eyebox area and field of view.

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Find out more about Computer-Generated Holography and why it represents the future of AR/VR wearables. Includes contributions from Microsoft, HTC Vive and NVIDIA.

“It is a real privilege to be able to grow the materials and produce the chip at two state-of-the-art facilities located in the same building,” said van Deurzen, referring to Duffield Hall. “You just go from the third floor to the basement.”

The hologram interference pattern is rendered to a display, also known as a Spatial Light Modulator (SLM). Unlike standard 2D display, we are not showing an image. Instead, the displayed hologram is used to modulate reflected light to create a 3D image that appears behind or in front of the SLM. Our technology supports commonly used display types, such as Digital Micromirror Display (DMD), Phase Light Modulators (PLM) and Liquid Crystal on Silicon (LCoS).

Includes designs for compact optical engines, pupil expansion methods for greater image coverage, and our revolutionary 3D waveguide combiner. Our waveguide design is an elegant solution for manufacturers looking to design stylish, ergonomic headsets while also reducing the cost of manufacturing as no complicated mechanics are required for IPD adjustments.

For gaming headset developers, this is made available through the Cobalt HDK, which delivers all the libraries, tools and designs necessary to get started creating your next-gen device.

The second challenge was to create an optical cavity from the stacked layers that could be used to trap the emitted light and promote stimulated emission, which is necessary for the laser. The cavity was created in the form of a small, micron-scale resonator on an aluminum nitride chip that van Deurzen was able to develop with the help of the Cornell NanoScale Science and Technology Facility.

“I wanted a research project that could have impact,” van Deurzen said, “and the pandemic really amplified the need for improved ultraviolet devices.”

The hologram interference pattern is then illuminated with a coherent or partially coherent light source, such as lasers or LEDs. The reflected interference pattern forms holographic, full colour images in front of the SLM, which appear 3D to the viewer or viewers. And this all happens in real-time.

ArFlaser

Nitrogenlaser

Once completed, the laser was able to achieve peak gain at a wavelength of 284 nanometers and modal linewidths on the order of 0.1 nanometers. The linewidth is an order of magnitude more precise than similar devices and demonstrates the growth method’s applicability towards improved ultraviolet light emitters.

We've broken through the known limitations of holographic display, allowing us to offer the consumer the ultimate in immersive visual experiences.

Semiconductorlaser

Our work leads the field of computer-generated holography, resulting in numerous scientific publications and conference presentations, such as:

“Deep-ultraviolet lasers arguably are the final frontier in semiconductor materials and devices with immense long-term payoffs,” said Jena, the David E. Burr Professor of Engineering and the Richard E. Lunquist Sesquicentennial Faculty Fellow. “Yet it is also the kind of problem that a young graduate student can get into and make an immediate impact.”

“We need multiple aluminum gallium nitride layers stacked on top of each other and one important parameter is the interface quality between those layers,” van Deurzen said. “We can grow very sharp interfaces without the impurities and dislocations that form with other growth techniques.”

The paper’s co-authors include doctoral student Ryan Page and research associates Vladimir Protasenko and Kazuki Nomoto. The research was funded by the U.S. Department of Energy and was supported by user facilities funded by the National Science Foundation.

Dyelaser

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Includes detailed architectural documentation, enabling manufacturers to explore further miniaturisation and cost reduction for mass production. Also includes a range of tools that help our customers and content developers to navigate the unique challenges presented by holographic image generation, from interfacing with 3D sources (game engines, depth cameras/sensors, etc) to transferring holograms onto display elements.

A paper published March 11 in the journal AIP Advances details how Cornell scientists produced an aluminum gallium nitride-based device capable of emitting a deep-ultraviolet laser at sought-after wavelengths and modal linewidths.

Excimerlaser

To support a wide range of device types and manufacturing preferences, we’ve developed display driver solutions that support a broad range of hologram-ready displays, such as LCoS, DMD and other spatial light modulators (SLMs). In addition, our technology can accommodate a range of light sources from lasers to LEDs, and enables full brightness control across the hologram and light sources, ensuring viewing consistency and fidelity to the input, with a high dynamic range.

Edmundslaser

Cornell engineers have created a deep-ultraviolet laser using semiconductor materials that show great promise for improving the use of ultraviolet light for sterilizing medical tools, purifying water, sensing hazardous gases and enabling precision photolithography, among other applications.

The CoReality technology stack contains all the fundamental tech necessary to power a holographic headset, head-up display, TV, or any other holographic product you can dream up.

When it comes to ultraviolet light, two important qualities are frequency – certain frequencies are best for destroying viruses or sensing molecules – and linewidth, a measure of the laser’s precision. Scientists and engineers seek sources of higher quality, more efficient ultraviolet light emission, but it’s challenging to work with the semiconductor materials that can enable this.

“It is known that this is a material that is suitable, but it was a materials synthesis problem,” said Len van Deurzen, a doctoral student in applied and engineering physics who led the research. “The challenge is making the materials pure enough that they're actually going to be useful and sustain the requirements of a laser.”

It was a challenge van Deurzen accepted during the COVID-19 pandemic when the market began to boom for ultraviolet LEDs and other tools capable of detecting and eliminating the SARS-CoV-2 virus.

The essential routines, methods, and libraries for generating and displaying holographic images in real time, as well as auxiliary functions such as the ability to compensate for a viewer's eyes and eyesight in software, interfacing with 3D data sources such as game engines, and syncing with illumination sources and displays.

Under the guidance of the paper’s senior authors, Debdeep Jena and Huili Grace Xing, both professors of materials science and engineering and of electrical and computer engineering, the team used molecular beam epitaxy, a crystal growth technique, to grow a high-quality crystal of aluminum nitride.

We have a global portfolio of over 50 patents and patent applications covering our core technology, tools and techniques.

Our software generates complex interference patterns - called holograms - based on input data from games engines and other 3D content sources. These engineer light waves to create fully 3D images and scenes. The hologram interference pattern that we calculate is a complete representation of the scene, containing all colour, texture and 3D cues needed by the human visual system.