Journal
JOURNAL OF APPLIED PHYSICS
Volume 113, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4795517
Keywords
-
Categories
Funding
- CREST project of Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [24686006] Funding Source: KAKEN
Ask authors/readers for more resources
Semiconductor charge-sensitive infrared phototransistors (CSIPs) based on quantum wells are described. They are the only detectors that are able to count single photons in the terahertz region at present. In terms of the noise equivalent power (NEP), the detectors show experimental values of 7 x 10(-20) W/Hz(1/2), while theoretically expected values are even much lower. These NEP values are by several orders of magnitude lower than any other state-of-the-art highly sensitive detectors. In addition to the outstanding sensitivity, the detectors are featured by strong advantage of huge current responsivity (>1 x 10(5) A/W) and low output impedance (<10 k Omega). This excellent performance in the above has been obtained for lambda = 12-28 mu m. By introducing a modified scheme of detection (called lateral-escape) along with an improved coupler structure (bowtie antenna), we have achieved similar excellent performance for 45 mu m. The CSIP provides extremely promising detectors for a variety of applications covering a wide spectral range of 12-100 mu m. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4795517]
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available