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<p>A novel semi-organic non-linear optical material, bis(diisopropylammonium) molybdate (IPAM), was grown using the slow evaporation method with water as a solvent. The IPAM crystal is a member of the non-centrosymmetric space group <i>P</i>4<sub>3</sub>2<sub>1</sub>2 tetragonal system. The crystal hardness, experimental refractive index, transmittance, and laser damage threshold were calculated. The particle dimension-dependent second-harmonic generation (SHG) efficiency for IPAM was assessed using the Kurtz–Perry powder technique with a Nd:YAG laser as the excitation source, which demonstrated phase-matching behavior. The Maker fringe method was used to determine the SHG of IPAM. According to the optical limiting study, the transmitted output increased linearly with irradiance input up to about 2.611&#xa0;mW&#xa0;mm<sup>−2</sup>. The IPAM crystal also exhibits the ability to produce optical rectification at 140 fs at a wavelength of 800&#xa0;nm derived from a Ti/sapphire laser, to produce pulsed terahertz radiation.</p> Graphical Abstract <p></p>

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Highly Efficient Non-linear Optical Hexagonal Single-Crystal Bis(Diisopropylammonium) Molybdate (IPAM) for Terahertz Generation

  • 期刊论文

  • 发表日期：

    2025年1月21日

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  • P. Vivek,
  • M. Rekha,
  • Ananth Steephen

摘要

A novel semi-organic non-linear optical material, bis(diisopropylammonium) molybdate (IPAM), was grown using the slow evaporation method with water as a solvent. The IPAM crystal is a member of the non-centrosymmetric space group P43212 tetragonal system. The crystal hardness, experimental refractive index, transmittance, and laser damage threshold were calculated. The particle dimension-dependent second-harmonic generation (SHG) efficiency for IPAM was assessed using the Kurtz–Perry powder technique with a Nd:YAG laser as the excitation source, which demonstrated phase-matching behavior. The Maker fringe method was used to determine the SHG of IPAM. According to the optical limiting study, the transmitted output increased linearly with irradiance input up to about 2.611 mW mm−2. The IPAM crystal also exhibits the ability to produce optical rectification at 140 fs at a wavelength of 800 nm derived from a Ti/sapphire laser, to produce pulsed terahertz radiation.

Graphical Abstract