[13a-N107-1~12] 3.1 Basic optics and frontier of optics

[13a-N107-6] Numerical and Experimental Study on Single-Mode Lasing in Fully Chaotic Microcavity Lasers

〇Mengyu You¹, Kota Makino¹, Daisuke Sakakibara¹, Susumu Shinohara¹, Satoshi Sunada², Takahisa Harayama¹ (1.Waseda Univ., 2.Kanazawa Univ.)

Keywords:Microcavity laser, Chaos

Stable lasing in fully chaotic two-dimensional(2D) microcavity lasers has been demonstrated by numerical simulations and experiments. For fully chaotic cavities (i.e., cavities with fully chaotic ray trajectories), the lasing states inside cavities are not only determined by the cavity shape geometries but also influenced by the nonlinear interaction between the light field and a gain medium causing modal competition. It was theoretically shown that single mode lasing states are stable whereas multimode lasing states are unstable under the assumption of the similarity of wave functions when the size of the fully chaotic 2D microcavity is much larger than the wavelength and the pumping energy is large enough. In this study, we numerically and experimentally investigated the lasing states for three different fully chaotic cavities, i.e., D-shaped, cardioid, and stadium cavities, all of which are proved to be fully ray-chaotic. We show that single-mode lasing occurs in all of these three cavities. This result provides systematic evidence for the validity of the single-mode lasing conjecture.