tag:blogger.com,1999:blog-19092890.post5232949520110716644..comments2024-03-28T17:41:43.970+02:00Comments on Image Sensors World: Automotive SWIR Startup Trieye Raises $17MVladimir Koifmanhttp://www.blogger.com/profile/01800020176563544699noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-19092890.post-67280438278653087722019-06-10T19:44:37.122+03:002019-06-10T19:44:37.122+03:00For now it is only an hypothesis that they're ...For now it is only an hypothesis that they're using Schottky detectors. I haven't seen a statement from them yet. Their papers do proper referencing back to the 80's - so I'd say they do a good job there. Let's see if they can make it a commercial success.Andreas Suessnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-82543856809814002182019-06-09T02:38:10.757+03:002019-06-09T02:38:10.757+03:00What is old is new again. There was a lot of work ...What is old is new again. There was a lot of work on infrared Schottky-barrier photodiodes in the 80's, by Walter Kosonocky at RCA for one.<br />For example, https://scholar.google.com/scholar?hl=en&as_sdt=0%2C30&q=kosonocky+walter+schottky+infrared&btnG= returns 144 results.<br />Eric R Fossumhttps://www.blogger.com/profile/09740612324630105312noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-79632447064579117442019-06-08T22:11:16.081+03:002019-06-08T22:11:16.081+03:00thanks Andreas, very interesting to learn there is...thanks Andreas, very interesting to learn there is yet another aproach to detect IR photons beyond the SI bandgap energy. Apart from the articles and links in the blog posts, I like the comments very much. Sometimes insights from "gurus" in their field, sometimes links to papers like this you sent. Since a few years, opening imagesensorworld is the first thing I do every day at work, I've learned a lot with this. Big thanks to Vladimir for running this site and to you all for posting comments ;-)Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-59534116265990358962019-06-06T23:17:54.226+03:002019-06-06T23:17:54.226+03:00There are a bunch of papers to be found on their w...There are a bunch of papers to be found on their website: http://www.cs.huji.ac.il/~ulevy/publications.php. E.g., look at this one describing Schottky detectors for use up to 2.5 um as well as the operating principle: http://www.cs.huji.ac.il/~ulevy/paper108.pdf The idea is that you don't propagate carriers from valance to conduction band but over over a Schottky barrier. Andreas Suessnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-36931709632675825202019-06-06T08:25:20.111+03:002019-06-06T08:25:20.111+03:00to me it seems that the schottky diodes paper (i o...to me it seems that the schottky diodes paper (i only found 1 with schottky and infrared - http://www.cs.huji.ac.il/~ulevy/paper90.pdf) still refers to lower wavelenght:<br />We demonstrate a nanoscale broadband silicon plas-monic Schottky detector with high responsivity and im-proved signal to noise ratio operating in the sub-bandgapregime. <br />Bandgap of SI is 1.14 eV according to https://en.wikipedia.org/wiki/Band_gap, which corresponds to a wavelength of 1087nm at 300K according to https://www.omnicalculator.com/physics/photon-energy. There is no photoelectric effect in SI by photons beyond 1087nm wavelength because the energy of this photons is simply too low. So a SI based detector that relys on the photoelectric effect cannot work. I have to admit - I did not read the paper, just the abstratct. But there they clearly speak of 'sub bandgap regime', to me this is a NIR related topic. They speak of SWIR in their product, so another paper seems to be more likely to be an explaination: http://www.cs.huji.ac.il/~ulevy/paper121.pdf. While this talks about MWIR:<br />It is shownthat this model can absorb light effectively with a maximumof 100% at the absorption peak wavelength. In addition,the absorption peak wavelength can be adjusted flexibly bychanging parameters, including the chemical potential appliedto graphene or other structural parameters of the structure.<br />I guess the product described above is more likely to be based on such a graphene type of approach than schottky diodes.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-10493779682997937682019-06-05T13:08:20.904+03:002019-06-05T13:08:20.904+03:00imaging in night conditions ?imaging in night conditions ?Anonymoushttps://www.blogger.com/profile/02848629304741859807noreply@blogger.comtag:blogger.com,1999:blog-19092890.post-25841129432370086962019-05-30T23:39:20.041+03:002019-05-30T23:39:20.041+03:00The CTO is Prof. Uriel Levy (http://www.cs.huji.ac...The CTO is Prof. Uriel Levy (http://www.cs.huji.ac.il/~ulevy/). Skimming through his quite interesting publication list, one can see he worked on defect assisted absorption as well as Schottky diodes, whereas his recent papers seem to suggest that the latter is the preferred method - supposedly also CMOS compatible and hence, probably a good guess on the underlying technology Andreas Suessnoreply@blogger.comtag:blogger.com,1999:blog-19092890.post-81676851982357310612019-05-30T22:34:18.098+03:002019-05-30T22:34:18.098+03:00what is the detection principle they use?what is the detection principle they use?Anonymousnoreply@blogger.com