Semiconductor Review: Specials Magazine

The promise of optoelectronics has always been bright. For decades, the field has promised smarter imaging, faster data transfer, and health monitoring tools that could change lives. Yet in practice, many of those promises stalled: Smartphones still struggle with under-screen facial recognition and autofocus on invasive continuous glucose monitors remain buggy and inaccurate prototypes; and traditional copper interconnects are struggling to meet exponentially increasing energy demands from the AI revolution, with data center fires and performance shortfalls becoming regular risks. For Jacob Tarn, Ph.D., CEO of InPHRED, this slowdown has been long coming—current optoelectronics are already at the limits of conventional semiconductor materials. With nearly forty years in the compound semiconductor industry, he had seen the potential of indium phosphide and gallium nitride technology, but also their shortcomings. The devices built on these material platforms could only stretch so far. That moment of recognition set InPHRED on its current path.“When I first engaged with Professor Han at Yale University on InPHRED’s nanoporous technology, I knew immediately that we had found a breakthrough that could take us beyond what conventional semiconductors had been able to achieve,” he says. InPHRED was founded on the belief that the right material innovation could unlock stalled applications across industries. By engineering nanoporous structures into semiconductors, InPHRED has managed to bend the rules of how light can be emitted and controlled. So far InPHRED has developed two families of flagship products—shortwave infrared (SWIR) vertical-cavity surface-emitting lasers (VCSELs) and resonant cavity LEDs (RC-LEDs)—but the company’s broader nanotechnology platform can transform the next generation of optoelectronics solutions. Rethinking Old Limits To understand the significance of InPHRED’s work, it helps to look back at what came before. Indium phosphide has been a workhorse in high-tech industries for more than thirty years. Its edge-emitting lasers powered telecom infrastructure and other demanding applications, but the nature of edge-emitting geometry meant that devices were expensive and complicated to manufacture, and difficult to scale. In contrast, vertical cavity surface-emitting lasers (VCSELs) have better yield, better optical properties, and can be much more manufacturable at scale. The key ingredient for VCSELs is a highly reflective mirror. For thirty years, the semiconductor industry hoped that it would be possible to build a surface-emitting indium phosphide laser—as had been achieved in gallium arsenide, a different material system. Gallium arsenide VCSELs are currently ubiquitous in consumer electronics products, but fundamental material limitations of the periodic table meant that there are no good mirrors for the indium phosphide system.

The display industry has progressed through LCD, DLP, OLED, LCOS, and MicroLED, powering everything from automotive dashboards and AR/VR headsets to medical and industrial devices. While these technologies have proven reliable, growing demand for smaller, more durable, and energy-efficient displays is exposing their limits. This opportunity is driving the rise of microdisplays across AR/VR, automotive, medical, and industrial applications. Many existing solutions still struggle with resolution, compactness, power efficiency, and reliability under heat and vibration, limited by legacy analog architectures that can’t keep up with modern digital demands. Syndiant, a pioneer in Liquid Crystal on Silicon (LCoS) microdisplays, and its subsidiary XDMicro form a full-stack semiconductor provider of high-resolution, low-power, compact display solutions. Building on nearly two decades of innovation, Syndiant’s LCoS microdisplays leverage precise digital control, high resolution, and low power in a compact reflective chip, delivering performance where traditional technologies fall short. Syndiant leads design and application development from its US headquarters, while XDMicro in China provides vertically integrated manufacturing, from liquid crystal to module and optical engine assembly, enabling high-volume automotive and consumer-grade products. “Unlike legacy solutions like DLP or analog LC, our focus is on delivering microdisplays that perform consistently in the real world, from next-generation AR glasses, projectors, to automotive system applications. Reliability and precision aren’t just specs—they’re essential to the experiences our customers are creating,” says Daniel Wong, President and CEO. From Design to Integration Syndiant’s LCoS microdisplays are reflective chips that modulate light to create projected images. Paired with ASIC controllers and integrated with optical engines, they form high-performance solutions for compact form factors. Syndiant’s architecture facilitates programmability, enabling manufacturers to fine-tune color and imaging performance. It also supports future advances like phase modulation for holographic displays and MicroLED development.