Memory was the first major AI bottleneck, as seen in explosive moves in Micron Technology Inc. (NASDAQ:MU) and SanDisk Corp. (NASDAQ:SNDK). Photonics could be the next one, and a new exchange-traded fund just opened for business to play it. The Corgi Lithography & Semiconductor Photonics ETF (CBOE: EUV) launched on May 6 as the first U.S.-listed fund built around the photonics theme. It holds $18.4 million in assets so far, a fraction of the nearly $7 billion that flooded into the Roundhill Memo
