红外与毫米波学报2026，Vol.45Issue(2)：236-242,7.DOI:10.11972/j.issn.1001-9014.2026.02.005
量子阱长波红外探测器混周期光栅对响应带宽的影响
Effect of mixed-period gratings on the photoresponse bandwidth of long-wavelength quantum well infrared photodetectors
摘要
Abstract
The expansion of response bandwidth is an important direction in the development of quantum well infrared photodetectors.Using quantum well material with the peak response wavelength at 10.55 μm,the diffraction grating structure in the 30 μm center distance quantum well infrared detector is optimized,and six different combinations of the mixed-period gratings are obtained by mixing three grating structures with the periods of 2.80 μm,3.50 μm,and 4.25 μm within a single photosensitive pixel.Photoresponse spectroscopy tests show that the response bandwidth of the mixed-period grating can be broadened from 1.20 μm to 1.91 μm by up to 60%compared to a single-period grating,while the blackbody responsivity decreases by only 12%.关键词
量子阱红外探测器/衍射光栅/响应光谱Key words
quantum well infrared photodetectors/diffraction grating/photoresponse spectrum分类
信息技术与安全科学引用本文复制引用
田亚萍,李志锋,李宁,李向阳,许金通..量子阱长波红外探测器混周期光栅对响应带宽的影响[J].红外与毫米波学报,2026,45(2):236-242,7.基金项目
国家重点研发计划(2024YFB3211704) Supported by the National Key R&D Progrom of China(2024YFB3211704) （2024YFB3211704）
