Multimode resonances in metallically confined square-resonator microlasers

Kai-Jun Che; Yue-De Yang; Yong-Zhen Huang
February 2010
Applied Physics Letters;2/1/2010, Vol. 96 Issue 5, p051104
Academic Journal
Directional emission InP/AlGaInAs square-resonator microlasers with a side length of 20 μm are fabricated by standard photolithography and inductively coupled-plasma etching technique. Multimode resonances with about seven distinct mode peaks in a free-spectral range are observed from 1460 to 1560 nm with the free-spectral range of 12.1 nm near the wavelength of 1510 nm, and the mode refractive index versus the photon energy E (eV) as 3.07152+0.18304E are obtained by fitting the laser spectra with an analytical mode wavelength formula derived by light ray method. In addition, mode field pattern is simulated for cold cavity by two dimensional finite-difference time-domain technique.


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