Continuous-wave phase-matched molecular optical modulator

Shin Ichi Zaitsu, Hirotomo Izaki, Takao Tsuchiya, Totaro Imasaka

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3 Citations (Scopus)


In optical modulation, the highest available modulation rate is basically limited to the GHz frequency range at best. This is because optical modulation is often performed using electro-optic or acousto-optic effects that require application of an external signal to solid-state nonlinear optical materials. Here we describe optical modulation of continuous-wave radiation at frequencies exceeding 10 THz based on ultrafast variation of molecule polarizability arising from coherent molecular motion. The optical modulation efficiency is extensively enhanced by fulfilling phase-matching conditions with the help of dispersion control of the optical cavity, generating sidebands with a highest ratio of 7.3 × 10 â '3. These results will pave the way for development of versatile optical modulation-based techniques in a wide range of research fields in optical sciences, such as mode-locked lasers operating in the THz range.

Original languageEnglish
Article number20908
JournalScientific reports
Publication statusPublished - Feb 18 2016


All Science Journal Classification (ASJC) codes

  • General

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