Monolithically integrated terahertz quantum cascade array laser. Issue 25 (1st December 2013)

• Record Type: Journal Article
• Authors: Chen, Jian‐Yan; Liu, Junqi; Wang, Tao; Liu, Fengqi; Wang, Zhanguo
• Is Part Of: Electronics letters. Volume 49:Issue 25(2013)
• Page Start: 1632
• Page End: 1633
• Publication Date: 2013-12-01
• Subjects: current density -- integrated optoelectronics -- quantum cascade lasers -- terahertz wave devices; monolithically integrated terahertz quantum cascade array laser -- threshold current density -- single‐lobe far‐field behaviour -- heat dissipation design -- power 213 mW -- temperature 10 K to 90 K; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2013.3456
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : By integrating triple terahertz quantum cascade lasers (at ∼3.25 THz) monolithically into an array, a peak power of 213 mW is obtained at 10 K with a threshold current density of only 257 A/cm 2 . The device shows distinct single‐lobe far‐field behaviour in the temperature range from 10 to 90 K, with a full‐width at half‐maximum of 36°. The highest operating temperature of the array laser is identical to that of the single ridge laser, indicating good heat dissipation design in the array. These results are promising for realising high power THz quantum cascade lasers.