ADVANCED MATERIALS & PROCESSES | OCTOBER 2024 9 of next-generation electronic and optoelectronic devices, including high- performance sensors, memory devices, and adaptive optical components. berkeley.edu. VISUALIZING NANOSTRUCTURES AND METAMATERIALS Scientists at the Max Planck Society in Munich developed a new microscopy method that allows for the unprecedented visualization of nanostructures and their optical properties. Metamaterials, engineered at the nanoscale, exhibit unique properties not found in naturally occurring materials. These properties arise from their nanoscale building blocks—which, until now, have been challenging to observe directly due to their size being smaller than the wavelength of light. The team’s research overcomes this limitation by employing a new microscopy technique that can simultaneously reveal both the nano and macrostructures of these materials. The key finding of this research is a methodological breakthrough that enables the visualization of structures previously too small to be seen with traditional microscopy. Using light in innovative ways, the scientists discovered how to trap one color of light within the structure and mix it with a second color that can leave the structure to visualize this trapped light. This trick reveals the hidden world of nanoscale optical metamaterials. The breakthrough is the result of more than five years of dedicated research and development, utilizing the unique features of the Free Electron Laser at the Fritz Haber Institute. This type of microscopy Graphical representation of sum-frequency spectro-microscopy of phonon polaritons in SiC micropillar arrays. Courtesy Fritz Haber Institute. is particularly special because it allows for a deeper understanding of meta- surfaces, paving the way for advancements in technologies such as lens design, and opening the door to the development of novel light sources and the design of coherent thermal light sources. www.mpg.de/en. STATEMENT OF OWNERSHIP, MANAGEMENT, CIRCULATION, ETC. Required by the Act of 23 October 1962, Section 4369, Title 39, United States Code, showing the ownership, management, and circulation of Advanced Materials & Processes®, publishes eight issues per year: January/February, March, April, May/June, July/August, September, October, and November/December at 9639 Kinsman Road, Materials Park, Ohio 44073, USPS # 762080. Annual subscription rate is $499. The publisher and editor are Scott D. Henry and Joanne Miller, respectively, both of 9639 Kinsman Road, Materials Park, Ohio, 44073. The owner is ASM International®, Materials Park, Ohio, which is a not-for-profit educational institution, the officers being; President and Chair of the Board, Navin J. Manjooran; Senior Vice President and Trustee, Elizabeth Hoffman; Vice President and Trustee, Daniel P. Dennies; Immediate Past President and Trustee, Pradeep Goyal; Executive Director, Veronica Becker; Treasurer and Trustee, Lawrence Somrack; Trustees, Amber Black, Pierpaolo Carlone, Rahul Gupta, Hanchen Huang, André McDonald, Victoria M. Miller, Christopher J. Misorski, Dehua Yang, and Fan Zhang; Student Board Members Gladys Duran Duran, Amanda Smith, and Nathaniel Tomas. There are no known bondholders, mortgagees, and other security holders owning or holding 1% or more of the total amount of bonds, mortgages, or other securities. The issue date for circulation data below is April 2024. The average number of copies of each issue during the preceding 12 months is: (a) Total number of copies printed: 2,146; (b) Paid and/or requested circulation: (1) Paid/requested outside county mail subscriptions: 1,514; (2) Paid in-county subscriptions: 0; (3) Sales through dealers and carriers, street vendors, counter sales, and other non-USPS paid distribution: 206; (4) other classes mailed through the USPS: 0; (c) Total paid and/or requested circulation: 1,720; (d.1) Free distribution or nominal outside-county: 13; (d.3) Free distribution by mail: 35; (e) Total free distribution: 48; (f) Total distribution: 1,768; (g) Copies not distributed: 401; (h) Total: 2,169; (i) Percent paid: 97. The actual number of copies of single issue published nearest to filing date is: (a) Total number of copies printed: 3,260; (b) Paid and/or requested circulation: (1) Paid/requested outside-county mail subscriptions: 2,447; (2) Paid in-county subscriptions: 0; (3) Sales through dealers and carriers, street vendors, counter sales, and other non-USPS paid distribution: 339; (4) other classes mailed through the USPS: 0; (c) Total paid and/or requested circulation: 2,786; (d.1) Free distribution or nominal outside-county: 21; (d.3) Free distribution by mail: 56; (e) Total free distribution: 77; (f) Total distribution: 2,863; (g) Copies not distributed: 392; (h) Total: 3,255; (i) Percent paid: 97. I certify that the statements made by me above are correct and complete. Scott D. Henry Publisher
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