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回复 2# negz
Dear Applicants
Thank you for your interest in the nanophotonics lab, and for working on the test problems. You got the first problem largely correct, but there were issues with your other solutions. However, I think you have good experience on your resume, and so I still think it may make sense for us to work together.
I think it would be good for me to discuss briefly the types of projects that I'd like to ask you to work on, if you were to join our group. There are two types of projects that I ask students to work on - lab oriented, and theory oriented. Although you did not do as well on our theory problems, based on your resume I think you could be a good candidate to work on a lab oriented project, at least at first. This is actually the type of work that I did when I was in grad school. I probably spent 80% of my time in front of a test bench, taking data. Sometimes it was extremely arduous - I remember that for one paper, "Photodetection in silicon beyond the band edge with surface states," I actually spent around 3 days, 14 hours a day continuously measuring photocurrent on various devices. At the end of the testing, I was no longer able to lift my right arm above the shoulder. But it was worth it - for me, it was no different from climbing a mountain or running across a desert; the physical and mental strain meant nothing, while the achievement was everything.
I'm writing all this because, frankly, not everyone feels this way about doing lab work, as I've learned over the past few years of running the group. In the past I've tended to hire students with very strong theoretical backgrounds exclusively, who got all the problems on the test right. Honestly, these students probably had a stronger level of theoretical knowledge than I did when I was a grad student. However, I've found that a lot of them do not like doing testing work. They are very happy to spend long hours working on designing things, which in many ways can sometimes be very repetitive, but they often don't like to go in and test devices - especially if the devices being tested are not theirs.. ----
Of course there is an important role for people who are focussing on theory projects in the group. But just as important is the role of the person doing lab work. And, let me be clear - this means a lot more than simply measuring devices over and over. It also means analyzing the data, and looking for patterns. I have done this type of thing for many years - and in fact, it's one of the primary things I do these days. By carefully looking at the data coming off photonics devices, you can learn so much - not just how the designs are working, but also you will learn how to identify things that are going wrong in the process, and whether the right starting material will use. In the role I'm envisioning for you, you'd also have a vital responsibility in maintaining the OpSIS PDK, that all of our users rely on to build photonics systems. You'd need to monitor every silicon run that we do, to see if the device performance is changing, and whether everything is working as it should - and also whether the PDK agrees with the measured data.
But I will tell you, also, that you will need to be ready for some work that some would see as extremely tedious. You may come to a time when you need to sit down and spend 14 hours a day testing the resistance of device after device, for 7 days in a row - because this is the only way we can learn what is going wrong that is causing our photonics systems to not work. It's more common that you would spend an hour or two of actual testing work per day, and spend the rest of the time in an office space that we'll have near our lab, working on either analyzing the data, or anything else that interests you. However, if you do work with us, what I must have is your willingness to go into lab and take data like this if we need it. If you see are going to see this as a tedious chore, this is not the right group for you. Let me stress this - because I do not have funding unless you work on a lab oriented project, it would be difficult for you to remain in the group, were you to decide that you did not wish to do much work in lab later. If, however, you feel excited about this type of project, as I do, then I think you could make a strong candidate.
I want to mention a couple of additional items. In this role, you would sometimes be responsible for testing the devices of more senior students. Much of the time, you would be testing my designs. For every result where you play a significant role in testing, you will be made a co-author. As a result, you may well find yourself a co-author on 3 or 4 papers, in just the first year, if we publish at our current rate. Also, as your graduate career progresses and you become an expert in this type of work, of course we will help you identify a number of potential topics for your thesis, and papers you can be first author on. There are many testing-related topics to choose from. It will also be important for you to improve your photonics design capabilities, because this knowledge will guide your work in lab. After around 3 years, (typical PhD lengths at NUS are 5 years), we can discuss if you would like to change focus a bit to something involving more design.
I have also found that it is essential for those involved in testing work to keep regular hours. I will expect that we can choose a schedule during business hours when you can typically be present in lab. This does not need to be every single day, depending on your class load and other factors. And obviously if you end up staying very late on one day working, it would be ok to come in a bit late the next day! However, it won't be possible to simply work at night. Some students who are doing theory projects have chosen to work at night. I think that might be possible if you are not doing much lab work and interacting as closely with me and other people, but for the role I envision for you, normal hours will be important.
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I would appreciate the opportunity to discuss our group a bit with you, perhaps by video chat. Do you have skype? My username is tbaehrjones1. Also, please send me your CV, GRE and TOEFL scores, and transcripts, as soon as possible.
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Regards,
Tom
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Tom Baehr-Jones, Ph.D.
Associate Director
Institute for Photonics Integration
University of Washington |
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