[labmembers] Updating mailing lists with Badger names ...

SNF Lab Members:

As you may recall, our equipment mailing lists are still using
subscriptions of the form coral_name@snf.stanford.edu and relying on
email forwarding to get messages directed to the proper address.

We now believe that the great majority of you have completed your Badger
conversion and equipment qualifications. As a result, it now seems to
be a good time to convert all of our mailing lists so that they use your
badger_name (which is an email address) as the address to which you are
subscribed to our lists.

Later today, I expect to run a script that will effect that conversion
based on the existing Badger equipment qualifications. Then, the
labmembers list will be populated on a nightly basis based on the list
of subscribers to all other lists.

Because Badger does not automatically subscribe you to mailing lists
based on equipment qualifications, I will periodically re-run this
script to add newly qualified members to appropriate lists.

After I have run this conversion, I will send out a message to the
"newly constituted" labmembers@snf.stanford.edu ... likely in the next
couple of hours. If you do not receive this second message, you likely
fell through the cracks. (Note: I realize that this is dangerously
close to asking you "Please let me know if you don't receive this
..."). Note: we do have a mechanism for making sure that you are added
to the labmembers@snf.stanford.edu list even if you are not qualified to
use any piece of equipment. If you fall into this category, please send
me email and ask me to add you to the "courtesy" list.

So, in the next hour or two (it is now nearing 12:30 p.m. on Sunday,
February 17) you should receive a second message posted to the new
labmembers mailing list. If you receive that message, you don't have to
do anything ... other than to know that you are subscribed to the
labmembers mailing list under your Badger name.

If you encounter any problems, please don't reply to the labmembers
mailing list, but to me directly: shott@stanford.edu.

Thanks for your cooperation,

John

p.s. For those of you who have already updated your subscriptions based
on your Badger login, I apologize in advance if anything that I do
undoes those previous subscriptions.



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[labmembers] Reminder: AP PhD Defense of Aaswath Raman (Today, 2pm, Allen 101)

Department of Applied Physics

University PhD Dissertation Defense

Broadband Nanophotonics: Plasmonic Band Theory & Light Trapping in Solar Cells

 

Aaswath Raman

Advisor: Professor Shanhui Fan

 

Friday February 15, 2013 @ 2:00 PM (Refreshments: 1:45 PM)

Location: Allen Building (CIS-X), Room 101

ABSTRACT

Subwavelength photonic structures enable a remarkable degree of control over light propagation and absorption at nanoscale dimensions. From sensing and modulation, to on-chip communication and light trapping in solar cells, new device applications and opportunities now motivate the need for a richer understanding of the optical properties of plasmonic structures and metamaterials over a broad range of frequencies.

In this talk, I will first introduce a photonic band theory that rigorously models the broadband behavior of plasmonic nanostructures and metamaterials. The theory formulates plasmonic band structures as Hermitian eigenvalue equations, and offers an intuitive physical picture of modal material loss. An upper bound on the modal material loss rate is then derived, placing fundamental limits on device operation. Furthermore, I will present a perturbation theory that elucidates the effect of dielectric refractive index modulation and metallic plasma frequency variation in plasmonic nanostructures.

Next, I will present a nanophotonic light trapping theory for solar cells and show that, using a nanophotonic design, one can exceed conventional limits on light trapping for all absorption regimes of the active material. The theory's insights are then applied to organic solar cells to design a dielectric light trapping structure that provides 10-15% photocurrent enhancement relative to an optimized planar organic solar cell. Finally, I will use the plasmonic band theory to probe the role of parasitic loss in the metal on achievable absorption enhancement factors in plasmonic light trapping schemes.

--
Aaswath P. Raman | aaswath@stanford.edu 
Ph.D. Candidate, Stanford University | http://www.stanford.edu/~aaswath

[labmembers] borrow ProTEK B3 for long time KOH etch

Dear labmembers,  

My process need a through-wafer KOH etch. From my experience, the unprotected front surface will be attacked. I am wondering if some of the groups have ProTEK B3, and I can borrow a little. I only need it for one wafer. We would like to pay for the portion. Thanks in advance. 

Best, 

Helen 

Helen Qiushi Ran
=========================================
Department of Electrical Engineering
Stanford University, Stanford, CA 94305.
Mobile: +1-650-796-1439
Email: qran@stanford.edu

[labmembers] Reminder: Oral Exam for Scott Lee Tomorrow!

Department of Electrical Engineering

University PhD Oral Examination

 

Nanoelectromechanical Relays 

for Low Power Digital Systems

 

Wm. Scott Lee

Research Advisor: Professor Roger Howe

 

Friday, February 15, 2013 @ 10AM

(Refreshments @ 9:45AM)

Location: Packard Building, Room 202

 

ABSTRACT

 

Field programmable gate arrays (FPGAs) are flexible digital circuits capable of implementing arbitrary digital logic. This flexibility comes at a price: a digital function implemented on an FPGA requires more area and power while operating at a lower speed compared to the same function built on an application specific integrated circuit (ASIC).  The overhead required to implement the programmable routing is directly responsible for much of the discrepancy. By replacing the FPGA pass transistors and SRAM programming cells with low leakage nanolectromechanical (NEM) relays, this overhead can be significantly reduced without a reduction in speed. The NEM relay consists of a released beam, a fixed gate electrode, and a fixed drain electrode. When the relay is out of contact, an air gap separates the beam and drain resulting in zero leakage. When the relay moves into contact, electrical current passes from the drain to the beam.

 

In this work, we investigate NEM relays as potential FPGA routing elements. The NEM relays must meet certain metrics with respect to contact resistance, cycling, and hysteresis to obtain significant benefits for the FPGA. NEM relays are fabricated and characterized to determine if they meet these metrics. Design and fabrication techniques are developed to decrease the contact resistance and achieve better control of the hysteresis window. These techniques enable three regions of varying stiffness for the spring, the actuation electrode, and the contact. Contact materials such as titanium nitride, hafnium diboride, and ruthenium are also explored as a means of reaching these metrics. 

[labmembers] Missing Projector

The Howe Group projector has been missing for over a week. It is a View Sonic projector and is likely in its black shoulder carry bag. Please email me if you might have seen it left in a room, on a chair, or have borrowed it. If not, please keep an eye out for it

Thanks for your help!

-Justin


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[labmembers] Cell phone found

Hi all --

Elmer found a cell phone dropped on the floor in the cube area. Anyone
lost one? Come by Maureen's cube.

Mary

--
Mary X. Tang, Ph.D.
Stanford Nanofabrication Facility
Paul G. Allen Room 136, Mail Code 4070
Stanford, CA 94305
(650)723-9980
mtang@stanford.edu
http://snf.stanford.edu

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[labmembers] Nanoscale Secondary Ion Mass Spectro-Microscopy - Feb 26, 12 pm - Free lunch!

Dear All - Come and have lunch with us while you hear about research enabled by the Cameca NanoSIMS 50L. The Cameca NanoSIMS 50L creates nanoscale maps of elemental composition, combining the high mass resolution, isotopic identification, and subparts-per-million sensitivity of conventional SIMS with spatial resolution down to 50 nm.

Tuesday, February 26th, 12:00 – 13:30, Spilker Building, Room 232
Help us plan - let us know if you plan to attend. Enter your name by Feb 24 at: http://www.surveymonkey.com/s/NanoSIMS

Hope to see you there!

TOBI

Tobias Beetz, Ph.D.
Associate Director, Stanford Nano Shared Facilities, Stanford University
348 Via Pueblo, Spilker Building, Stanford, CA 94305-4088

[labmembers] Looking for laminator

Dear Labmembers,

 

I am looking for a laminator in the cleanroom. Our group (Prof. Khuri-Yakub group) bought one laminator years ago and it had been kept in the litho area on the shelf next to the developer. Now it is disappeared somehow and cannot find it any more. If there is anyone who has ever seen this laminator or has taken from the litho area, please let me know. It should look like a black laser printer cartridge.

 

Just in case I cannot find the laminator any more, I am also wondering if anyone/group has a laminator (heat and pressure) that I can borrow. I would like to use it for Riston film.

 

Thanks,

Hyo-Seon.

 

[labmembers] Lost Earmuffs!

Hi All,

 

I was at a lecture at CISX Auditorium yesterday and think I lost my earmuffs there.  Can you please let me know if you find them – because they are my favorites??

 

Thank you so much,

Takane

 

--
Takane Usui
Ph. D. Candidate
Stanford University

Email: takane@stanford.edu
Phone: (310) 500-6132
Web: npl-web.stanford.edu

[labmembers] Process cooling water and CDA

Dear Labmembers --

As you might have noticed, around 10 am, we just experienced a loss of
building cooling water and compressed air. Tony, from Facilities, was
able to determine that it was a problem with the pressure switch on the
cooling water system. He has repaired and tested this. We are back up
and running on cooling water and CDA. The maintenance crew are in the
lab, checking on tool status right now.

We apologize for any inconvenience. Please report any problems you
might observe on any tools you've used during this time to the
maintenance crew.

Mary

--
Mary X. Tang, Ph.D.
Stanford Nanofabrication Facility
Paul G. Allen Room 136, Mail Code 4070
Stanford, CA 94305
(650)723-9980
mtang@stanford.edu
http://snf.stanford.edu

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[labmembers] NanoDays at Stanford - March 12th - call for volunteers

All,

Celebrate NanoDays at Stanford on Tuesday, March 12th by sharing your love of science and inspiring a diverse group of middle school students!  CPN, along with SNF and the Nano Shared Facilities, is partnering with Techbridge to bring a group of girls from two Oakland schools to campus for this nationwide festival of educational programs about nanoscale science and engineering.  We'll have fun, hands-on activity stations that showcase the special and unexpected properties of nanoscale materials (courtesy of kits from NISE Network), lunch discussions about your path to becoming a scientist, and lab tours and instrument demos.

We're looking for volunteers ranging from students to postdocs to faculty and staff scientists.  Bilingual (Spanish/English) and/or female volunteers are especially needed as role models for these girls.  Even if you aren't in either category, we want you too!  If you're interested in participating and more details, please sign up here: http://www.surveymonkey.com/s/stanfordnanodays.

Note: if you are interested specifically in giving a quick window tour of SNF to a small group of students at 10:30am that day, contact Mike Deal, mdeal@stanford.edu, directly.  To help with other activities, go to the surveymonkey website.

Thanks!

Mike Deal, SNF, and Maria Wang, Center for Probing the NanoScale

[labmembers] Facilities issues

Hello All,
We are experiencing Facilities issues and have lost process cooling
water and CDA this means many tools will be down.WE will advise when we
are back to normal. Lab staff
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[labmembers] University PhD Dissertation Defense of Aaswath Raman

Department of Applied Physics

University PhD Dissertation Defense

Broadband Nanophotonics: Plasmonic Band Theory & Light Trapping in Solar Cells

 

Aaswath Pattabhi Raman

Research Advisor: Professor Shanhui Fan

 

Friday February 15, 2013 @ 2:00 PM

Location: Allen Building (CIS-X), Room 101

ABSTRACT

Subwavelength photonic structures enable a remarkable degree of control over light propagation and absorption at nanoscale dimensions. From sensing and modulation, to on-chip communication and light trapping in solar cells, new device applications and opportunities now motivate the need for a richer understanding of the optical properties of plasmonic structures and metamaterials over a broad range of frequencies.

In this talk, I will first introduce a photonic band theory that rigorously models the broadband behavior of plasmonic nanostructures and metamaterials. The theory formulates plasmonic band structures as Hermitian eigenvalue equations, and offers an intuitive physical picture of modal material loss. An upper bound on the modal material loss rate is then derived, placing fundamental limits on device operation. Furthermore, I will present a perturbation theory that elucidates the effect of dielectric refractive index modulation and metallic plasma frequency variation in plasmonic nanostructures.

Next, I will present a nanophotonic light trapping theory for solar cells and show that, using a nanophotonic design, one can exceed conventional limits on light trapping for all absorption regimes of the active material. The theory's insights are then applied to organic solar cells to design a dielectric light trapping structure that provides 10-15% photocurrent enhancement relative to an optimized planar organic solar cell. Finally, I will use the plasmonic band theory to probe the role of parasitic loss in the metal on achievable absorption enhancement factors in plasmonic light trapping schemes.

 

[labmembers] Registration for SUPR 5 is open! - Stanford University Photonics Retreat

Early registration for SUPR 5 is open! April 12-14, 2013 Email not displaying correctly? View it in your browser. Early registration for SUPR 5 is open -- register now for a discounted rate! Registration fee for OSA/SPIE members is $50 until February 20. JOIN US FOR A WEEKEND OF Exciting speakers PhD career workshop Fun social and networking activities Poster sessions & prizes! Register Now Subsidized registration fees for Stanford students and post-docs! Early registration (until 11:59 PM on Feb. 20): OSA / SPIE Members: $50  Non-members: $150 Regular registration (Feb. 21-Mar. 6): OSA / SPIE Members: $75  Non-members: $175 Registration includes 2 nights shared lodging at the DoubleTree Hotel, all meals, and transportation! Join/renew OSA or SPIE for only $20/$30 to get the reduced rate! More details available at: http://supr.stanford.edu. Interested faculty please contact us directly: stanford-photons@stanford.edu. What is SUPR? SUPR is the Stanford University Photonics Retreat, a student-organized conference for Stanford's optics and photonics community (students, faculty and invited guests & alumni) that is held each year at an off-campus location.   SUPR 2013 (aka SUPR 5) will be our fifth retreat and is planned by the Stanford Optical Society (a student chapter of OSA/SPIE) and the Stanford Photonics Research Center (SPRC). We believe it is essential to have a dedicated weekend for the greater photonics community to meet off campus, share their research, network, and build fruitful collaborations.   This year, our keynote speakers will be Prof. Arthur Bienenstock, Emeritus Professor of Photon Science and Special Assistant to the President for Federal Research Policy, and Dr. David Blake, Research Scientist at NASA Ames Research Center and Principal Investigator of CheMin, an instrument on NASA's Curiosity Rover. SUPR 5 will also feature exciting and topical faculty talks, workshops, student poster sessions, a panel discussion on the future of optics (featuring alumni and the broader optics community), and social activities/excursions in beautiful Sonoma county.   Brought to you by the SUPR 5 Program Committee Chair: Matthew Lew Committee: Kristen Anand, Sam Bockenhauer, Robert Chen, Ryan Hamerly, Cathy Jan, Lana Lau, Marissa Lee, Yu-wei Lin, Marina Radulaski, Aaswath Raman, Stephen Wolf Follow on Twitter | | Forward to Friend  Copyright © 2013 Stanford Optical Society, All rights reserved. You are receiving this e-mail as part of a Stanford department/organizational mailing list. We want to reach everyone in the optics and photonics community at Stanford. One of SUPR's goals is reach out past the various departmental barriers to bring this community together for one awesome weekend! Our mailing address is: Stanford Optical Society c/o Kristen Anand Box 114, 348 Via Pueblo Mall Stanford, CA 94305 Add us to your address book

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