Gopal Photonics Research Laboratory-GPRL

20/02/2026

New publication

Particle motion at fluid interfaces is commonly governed by static capillary interactions, limiting active control. Here, we introduce a geometry-controlled capillary well formed by a neck-shaped meniscus around a vertically actuated rod, enabling reversible trapping and guided migration of particle...

01/12/2025

New publication:
https://www.researchgate.net/publication/397685267_Pulsed_laser-induced_water_surface_elevation_and_its_relationship_to_Abraham_momentum

11/10/2025

We are pleased to share our new publication presenting an optical technique for studying the photomolecular effect.

https://doi.org/10.1364/OL.576177

22/05/2025

We pleased to share our recent research that reveals how tunable light pressure at an air–water interface can deform the surface by adjusting water depth and laser spot size. This research also uncovers a critical ratio for force reversal and shows nanomechanical effects without affecting the Abraham–Minkowski debate.

06/04/2025

Interactive session 🌀☀️

24/03/2025

https://youtu.be/85StGTQSgMA?si=HFMUg6VLdRSIJpgQ

National Research Council of Italy के वैज्ञानिकों ने पहली बार प्रकाश को ठोस अवस्था में बदलने में सफलता हासिल की है। इस उपलब्धि को क्वांट...

24/03/2025

"Why does the tea cup's outer surface feel hotter during the stirring of tea"?

For more detail:
https://doi.org/10.1063/5.0247241

18/03/2025

We are pleased to share our latest research on a 🌈radiation pressure-driven AFM-like nanoindentation technique. By leveraging total internal reflection, we enhance radiation pressure fourfold, enabling precise elasticity measurements of soft materials like human skin and dried milk layers. This versatile method offers a powerful tool for characterizing soft biological materials with high accuracy.

For more details: https://pubs.aip.org/aip/pof/article/37/3/031703/3340014/Probing-elasticity-of-soft-bio-material-through

16/03/2025

How does the capillary edge influence the emptying criteria?

For more details: https://doi.org/10.1103/PhysRevFluids.5.112201