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arXiv · 1811.08786

Room temperature surface emission on large-area photonic crystal quantum cascade lasers

Yong Liang·Zhixin Wang·Johanna Wolf·Emilio Gini·Mattias Beck·Bo Meng·Jérôme Faist·Giacomo Scalari
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Abstract

We design and fabricate large-area (1.1 mm $\times$ 1.1 mm) photonic crystal quantum cascade lasers, enabling single-mode (wavelength $\sim$ 8.5 $\mu$m) surface emission at room temperature, with a maximum peak power up to 176 mW. The beam divergence is $< 1 ^{\circ}$ and without side-lobes. Moreover, by introducing asymmetry into the photonic crystal pillar shape, a single-lobed far-field is realized. The photonic band structure is measured with high spectral (0.72 cm$^{-1}$) and angular (0.1 $^{\circ}$) resolution by using the photonic crystal quantum cascade laser itself as a detector.

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Yong Liang, Zhixin Wang, Johanna Wolf, Emilio Gini, Mattias Beck, Bo Meng, Jérôme Faist, Giacomo Scalari. 2018-11-21. Room temperature surface emission on large-area photonic crystal quantum cascade lasers. https://doi.org/10.1063/1.5082279

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