As the global race for artificial intelligence supremacy accelerates, the digital infrastructure underpinning these massive computational workloads is facing a physical bottleneck. Beijing has begun intensifying its scrutiny of indium exports—a rare, silvery-white metal that serves as the backbone for high-speed AI chips. This development has triggered alarm bells in Washington, Brussels, and Tokyo, as industry leaders fear that China is moving toward formal export restrictions that could paralyze the expansion of the next generation of AI data centers.
The mounting pressure on indium, and its processed compound, indium phosphide (InP), marks the latest chapter in a broader geopolitical struggle over the "materials chokepoint." By leveraging its dominance in the global supply chain, Beijing is demonstrating an increasingly granular ability to influence the pace of Western technological progress.
The Indium Paradox: A Rare By-Product in High Demand
Indium is a peculiar element in the global commodities market. It is not found in large, concentrated deposits like copper or iron; rather, it is a scarce by-product of zinc smelting. According to John Emsley in Nature’s Building Blocks, the metal is rarely economically viable to extract on its own, making the global supply chain inherently fragile.
China currently controls approximately 70% of the world’s indium production. This concentration has turned a minor industrial commodity into a strategic asset. While the raw metal itself has not yet been formally placed on China’s restricted export list, the regulatory environment is tightening. Multiple buyers have reported heightened checks at Chinese customs, with officials demanding granular data on end-customers, intended applications, and specific geographic locations.
This administrative "slow-walk" mirrors tactics previously used by Beijing to exert influence over rare earth elements, effectively turning supply chain bureaucracy into a tool of foreign policy.
Chronology: The Escalation of Export Controls
The friction surrounding indium-based materials has intensified over the last eighteen months, marking a transition from a manageable supply chain issue to a high-stakes geopolitical crisis.
- February 2025: China formally implements export controls on indium phosphide (InP), citing national security concerns. The move sends shockwaves through the semiconductor industry.
- March 2025: Strategic investments by Nvidia, totaling $2 billion each, flow into photonics giants Coherent and Lumentum, signaling a desperate need to secure the supply chain for silicon photonics.
- May 2026: Coherent, a key Nvidia supplier, publicly flags a critical shortage of indium phosphide during its quarterly earnings call.
- June 2026: Coherent CEO Jim Anderson joins a high-level U.S. business delegation accompanying President Donald Trump to Beijing, specifically to lobby for the release of delayed export licenses.
- Mid-2026: The G7 announces a new critical minerals alliance, pledging to coordinate efforts to diversify supply chains and reduce dependence on Chinese-controlled materials.
Silicon Photonics: The AI Bottleneck
The urgency behind these maneuvers lies in the fundamental shift in how data centers are built. As AI models grow in complexity, the traditional use of copper wiring for data transmission is hitting a "physical wall" due to heat and bandwidth limitations.
Silicon photonics—a technology that uses light pulses instead of electrical signals—has emerged as the solution. At the heart of this technology is indium phosphide. It is the only material currently capable of facilitating the ultra-high-speed, low-latency transmission required by massive GPU clusters. There is, at present, no viable industrial substitute.
The economic impact of the February 2025 controls was immediate. According to reports from the industry, the average price for a 6-inch InP wafer surged by 250%, reaching $5,000. As Konrad Wang of the research firm SemiAnalysis noted, "InP is one of several supply chain bottlenecks collectively gating AI data center buildouts." If the supply of these wafers is constrained, the global deployment of AI infrastructure—and by extension, the economic productivity associated with AI—effectively stalls.
Official Responses and Diplomatic Friction
The vulnerability of the U.S. supply chain has become a top-tier diplomatic priority. Following the earnings call in May 2026, the situation moved from the boardroom to the summit floor. Sources close to the negotiations between President Trump and President Xi Jinping confirm that the issue of export licenses for photonics substrates was a primary topic of trade discussions.
Despite these talks, the situation remains dire for companies like AXT, the world’s second-largest InP substrate producer. AXT has reported that export permits have become the "most significant challenge" to its operations. Because the company manufactures the bulk of its substrates within China, it remains hostage to the evolving regulatory whims of the Ministry of Commerce.
In response, U.S. firms are scrambling to "onshore" or "friend-shore" production. Coherent has announced an aggressive expansion of its Texas-based wafer capacity, aiming to double it this year and double it again by the end of 2027. However, analysts warn that this is a race against time. A new, high-grade semiconductor substrate plant typically takes 24 to 36 months to become fully operational.
China’s Domestic Pivot
While Western firms struggle with permits, Chinese domestic manufacturers are receiving significant state support to fill the gap. Companies such as Yunnan Germanium, Guangdong Xiandao, and Zhuhai Dingtai Xinyuan are scaling up at a rapid pace.
In April 2026, Yunnan Germanium earmarked 189 million yuan ($28 million) to expand its capacity to 450,000 single InP wafers annually. Their annual report showed a staggering 74% increase in shipments, reflecting a strategic shift to prioritize domestic supply and regional dominance.
However, industry insiders suggest that Beijing’s strategy is not merely to favor domestic players, but to maintain a "granular" control over the global market. A source at a major Chinese manufacturer noted that the government’s priority is long-term strategic leverage. Whether a company is domestic or foreign, if it handles critical minerals, it is subject to the same overarching directive: that these materials must serve the national interest of the People’s Republic.
Implications for Global Stability
The escalating scrutiny of indium exports highlights a deeper, systemic vulnerability. The U.S. Department of War has begun a program of emergency stockpiling for critical minerals, but this is a reactive measure to an ongoing problem. As the U.S. Geological Survey recently warned, the United States has become fully import-dependent on 16 non-fuel minerals, a list that continues to grow.
The geopolitical implications are profound:
- The "Material Chokepoint" Doctrine: Beijing is shifting away from broad trade wars toward precision-targeted materials controls. By picking off specific, irreplaceable materials like indium, gallium, and germanium, China can disrupt Western tech sectors without triggering a full-scale trade collapse.
- Increased Diplomatic Fragmentation: The G7’s formation of a critical minerals alliance marks an attempt to build a "minerals NATO." However, diplomatic efforts, such as seeking new supply sources in South Africa or elsewhere, require years of negotiation and infrastructure development.
- The High Cost of Decoupling: For the private sector, the cost of this geopolitical maneuvering is massive. Capital that could be spent on R&D or AI innovation is instead being diverted to secure redundant supply chains, lobby for export permits, and build expensive, high-risk domestic production facilities.
Conclusion: A New Era of Resource Realism
The crisis surrounding indium phosphide serves as a masterclass in modern economic statecraft. We are moving away from an era of globalized supply chain efficiency and into an era of "resource realism."
As AI data centers become the "factories" of the 21st century, the materials required to build them have effectively become the "oil" of the digital age. The race to secure the supply of indium is no longer just a technical challenge for chipmakers; it is a central geopolitical issue that will define the balance of power between the U.S. and China for the remainder of the decade. As the supply chain tightens, the world is finding that the smallest of elements can have the largest of impacts on the global order.
