# The resonant heating of heavy water solutions under the terahertz pulse irradiation

## TL;DR

This study uses molecular dynamics simulations to explore how terahertz pulses resonantly heat heavy water solutions, revealing distinct resonant frequencies and mechanisms compared to light water, with potential practical applications.

## Contribution

It identifies specific resonant frequencies for heavy water and explains the heating mechanism through collective rotational modes, highlighting differences from light water.

## Key findings

- Resonant absorption at about 16 THz for heavy water
- Different resonant frequency for light water at 21 THz
- Resonance involves collective rotational modes that release water molecules from hydrogen bonds

## Abstract

The heating effect of terahertz pulse with various frequencies and intensities on the heavy water solution is investigated using the molecular dynamics simulation. Resonant absorptions are found for both heavy water and light water, but at a different resonant frequency which is about 16 THz for heavy water and 21 THz for light water. This resonant phenomenon can be explained perfectly by the collective rotational modes that may release water molecules from hydrogen bonding. The findings not only illustrate the heating mechanism of heavy water solution under the terahertz pulse irradiation, but also demonstrate a novel difference between light water and heavy water that could have potential applications.