期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 93, 期 3, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0081544
关键词
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资金
- Cooperative Research Project of Research Center for Biomedical Engineering [2010]
- JSPS KAKENHI [20H02191]
- Grants-in-Aid for Scientific Research [20H02191] Funding Source: KAKEN
This article presents a method for designing quantum devices using amorphous materials and physical vapor deposition. It shows that the multiplication factor is related to the number of superlattice layers.
In semiconductor device history, a trend is observed where narrowing and increasing the number of material layers improve device functionality, with diodes, transistors, thyristors, and superlattices following this trend. While superlattices promise unique functionality, they are not widely adopted due to a technology barrier, requiring advanced fabrication, such as molecular beam epitaxy and lattice-matched materials. Here, a method to design quantum devices using amorphous materials and physical vapor deposition is presented. It is shown that the multiplication gain M depends on the number of layers of the superlattice, N, as M = kN, with k as a factor indicating the efficiency of multiplication. This M is, however, a trade-off with transit time, which also depends on N. To demonstrate, photodetector devices are fabricated on Si, with the superlattice of Se and As2Se3, and characterized using current-voltage (I-V) and current-time (I-T) measurements. For superlattices with the total layer thicknesses of 200 nm and 2 mu m, the results show that k(200nm) = 0.916 and k(2 mu m) = 0.384, respectively. The results confirm that the multiplication factor is related to the number of superlattice layers, showing the effectiveness of the design approach. Published under an exclusive license by AIP Publishing
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