Market Trends & Industry Dynamics - Photonics technology utilizes light (photons) instead of copper wiring (electrons) to transmit data, offering superior energy efficiency and speed for AI data centers and cloud computing [1][2][3] - Goldman Sachs projects that the total addressable market for optical networking will experience a greater than 9-fold increase, surging from approximately $15 billion in 2026 to $154 billion through 2028 [4] - Industry momentum accelerated significantly following Nvidia's strategic $2 billion investments in Lumentum and Coherent, alongside a $2 billion stake in Marvell for silicon photonics development [5] Investment Opportunities & ETF Products - Corgi Lithography and Semiconductor Photonics ETF (EUV) stands out as the largest and cheapest option in the sector, managing $473 million in assets with a 35 basis points expense ratio and holding major semiconductor giants like ASML, Applied Materials, and Lam Research [6][7][8] - Roundhill Photonics and Optics ETF (LIGHT) rapidly gathered $361 million in assets with a 65 basis points expense ratio, featuring an actively managed portfolio heavily weighted toward Chinese companies, including Eoptolink Technologies, which comprise nearly 50% of its exposure [9][10] - Tema Photonics ETF holds $81 million in assets with a 75 basis points expense ratio, providing niche exposure that includes approximately a 2% pre-IPO stake in Anthropic via a special purpose vehicle (SPV) [11] - Additional emerging fund options include the Tuttle Capital Pure Play Photonics ETF and the KraneShares Photonics ETF (LUMA), reflecting surging investor demand for targeted exposure in this volatile technology sector [12][13][14]