RRI scientists find teak leaf extract can act as a natural laser shield
On 27 June 2025 in New Delhi, the Department of Science and Technology reported that Raman Research Institute scientists found teak leaf extract can serve as a natural laser shield.
Summary
The Department of Science and Technology (DST) reported in New Delhi on 27 June 2025 that scientists at the Raman Research Institute (RRI), a DST-funded autonomous institute, found a use for discarded teak (Tectona grandis) leaves. The leaves are rich in anthocyanins, natural reddish-brown pigments that show nonlinear optical (NLO) properties. This makes the extract a candidate for optical power-limiting, protecting eyes and sensors from high-power lasers. Tests used green laser light, in both continuous-wave and pulsed modes, with Z-Scan and Spatial Self-Phase Modulation techniques. The work was published in the Journal of Photochemistry and Photobiology A: Chemistry and offers an alternative to costly synthetic optical materials.
Key facts
- Institute
- Raman Research Institute (autonomous, DST-funded)
- Plant
- Teak, Tectona grandis
- Pigment
- Anthocyanins
- Property
- Nonlinear optical (optical power-limiting)
- Techniques
- Z-Scan, Spatial Self-Phase Modulation
- Journal
- Journal of Photochemistry and Photobiology A: Chemistry
Practice MCQs 2 questions
Scientists of which institute found that teak leaf extract can act as a natural, biodegradable laser shield (reported 27 June 2025)?
Show answer
Correct answer: A — Raman Research Institute
PIB (DST): scientists at the Raman Research Institute (RRI), an autonomous institute funded by DST, uncovered the use of teak leaves.
Which natural pigment in teak leaves shows the nonlinear optical properties that make the extract suitable for optical power-limiting?
Show answer
Correct answer: D — Anthocyanins
PIB (DST): teak leaves are rich in anthocyanins, natural pigments whose nonlinear optical properties make the extract suitable for optical power-limiting.