Quantum dot vertical-cavity surface-emitting lasers covering the 'green gap'

Light, Science & Applications
Yang MeiHao-Chung Kuo

Abstract

Semiconductor vertical-cavity surface-emitting lasers (VCSELs) with wavelengths from 491.8 to 565.7 nm, covering most of the 'green gap', are demonstrated. For these lasers, the same quantum dot (QD) active region was used, whereas the wavelength was controlled by adjusting the cavity length, which is difficult for edge-emitting lasers. Compared with reports in the literature for green VCSELs, our lasers have set a few world records for the lowest threshold, longest wavelength and continuous-wave (CW) lasing at room temperature. The nanoscale QDs contribute dominantly to the low threshold. The emitting wavelength depends on the electron-photon interaction or the coupling between the active layer and the optical field, which is modulated by the cavity length. The green VCSELs exhibit a low-thermal resistance of 915 kW-1, which benefits the CW lasing. Such VCSELs are important for small-size, low power consumption full-color displays and projectors.

References

Aug 15, 2003·Nature·Ursula Keller
Jun 15, 2012·Applied Optics·Yunfang ZhangYuliang Liu

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Citations

Jan 11, 2020·Science Advances·Yong-Ho RaZetian Mi
May 31, 2019·Nanoscale Research Letters·Jianwei BenDabing Li
Nov 22, 2018·Applied Optics·Lei XiangLiJun Wang
Dec 31, 2020·Nanomaterials·Sung-Un Kim, Yong-Ho Ra
May 30, 2021·Advanced Materials·Jianwei BenXiaojuan Sun
Jan 29, 2021·ACS Photonics·Filip HjortÅsa Haglund

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