Directional lasing oscillation of two-dimensional organic photonic crystal lasers at several photonic band gaps

Notomi, M.; Suzuki, H.; Tamamura, T.
March 2001
Applied Physics Letters;3/5/2001, Vol. 78 Issue 10, p1325
Academic Journal
We fabricated a series of two-dimensional (2D) hexagonal organic photonic-crystal lasers whose lattice constant varies from 0.18 to 0.44 μm, and observed clear lasing oscillation at the four lowest band gap frequencies (M[sub 1], K[sub 2], M[sub 2], and Γ[sub 1]). We used in-plane beam propagation analysis to clarify the 2D feedback mechanism at each gap frequency, which differs for different gaps. The observed K[sub 1] lasing oscillation is due to coupling of three nonparallel diffracted waves, which has a purely 2D character. This shows that photonic crystal lasers can operate with various feedback essentially different from that of conventional 1D distributed feedback lasers. © 2001 American Institute of Physics.


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