# Sogang University Synthesizes Peroxomolybdate Crystals with 34.9 Times KDP Response

- Published: 2026-11-06 07:52 UTC
- Section: Machines & Making › Materials science
- Tags: Sogang University, second-harmonic generation, nonlinear optics, peroxomolybdate, KDP, coordination engineering
- URL: https://realtech.media/news/rt-ec0b248eddcfc68e5b732323_sogang_university_synthesizes/

**Researchers engineered non-centrosymmetric crystals that demonstrate enhanced second-harmonic generation under laser irradiation in the lab.**

![Sogang University Synthesizes Peroxomolybdate Crystals with 34.9 Times KDP Response](https://sgzwpqqelzmajkcubgkl.supabase.co/storage/v1/object/public/rt-media/2026/11/f921b8ec86f25610.jpg)
*Lisa Bock &  Ulrike Burkhardt, Wikimedia Commons, CC BY-SA 4.0*

A joint research team led by chemistry professor Ok Kang-min and physics professor Joon I. Jang at Sogang University, together with postdoctoral researcher Zeng Wei, has synthesized three types of peroxomolybdate crystals that exhibit a second-harmonic generation signal 34.9 times stronger than potassium dihydrogen phosphate (KDP) [1]. The findings were published in the Journal of the American Chemical Society, koreadaily.com reported on November 5, 2026.

## Coordination-site engineering

The researchers implemented a coordination-site engineering strategy by varying the coordination modes of organic molecules bound to peroxomolybdate units containing molybdenum and peroxide groups [1]. Modifying how these organic molecules bonded altered the internal atomic alignment and symmetry of the resulting crystalline lattices. The approach allowed the π-electron systems of the organic components, the molybdenum metal centers, and the peroxide electron clouds to collectively drive nonlinear optical activity within non-centrosymmetric structures [1].

## Harmonic generation performance

During optical testing, the synthesized crystals converted light under a 1300 nm fundamental laser source, yielding a second-harmonic response 34.9 times that of standard KDP [1]. The materials maintained their nonlinear optical characteristics under high-intensity laser irradiation. The authors combined laboratory crystal synthesis, structural determination, optical measurements, and theoretical calculations to map how structural modifications directly govern the efficiency of wavelength conversion [1].

## Sources

1. [koreadaily.com](https://www.koreadaily.com/article/20261105231240169)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-ec0b248eddcfc68e5b732323_sogang_university_synthesizes/