Presentation Information

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[22a-A308-8]Optimizing Waveguides in Photonic Crystals for High-Efficiency Surface Emission in Terahertz Quantum Cascade Lasers Using High-Index Contrast Coupled-Wave Theory

〇(DC)Mingxi Chen^1,2, Chiko Otani^1,2, Hideki Hirayama¹ (1.RIKEN RAP, 2.Tohoku Univ.)

Keywords:

surface emitting THz QCL,TM-mode HC CWT,photonic crystal

This study aims to enhance the performance of surface-emitting terahertz quantum cascade lasers (SE THz QCLs) by simulating band-edge mode characteristics through metallic photonic crystal configurations with three distinct air node designs: cylindrical, right-angled triangular, and double lattice resonator. The high-index-contrast coupled wave theory (HC CWT) is employed to conduct precise theoretical calculations in these simulations. The accuracy of these calculations is affirmed by contrasting the outcomes with those derived from the finite difference time domain (FDTD) method, which exhibit a mere 2% frequency deviation. The insights gleaned from these simulation results are invaluable for guiding subsequent experimental endeavors in pursuit of high-powered, single-mode SE THz QCLs.

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