aspuru-list July 2016

aspuru-list@lists.fas.harvard.edu

18 participants
43 discussions

by Sawaya, Nicolas Per Dane

Heyo, I think Ian is still on vacay, so here's my abstract. See you soon (3:30). -Nicolas "Choosing Exciton Transfer Pathways using Light Pulses." In the design of nanoscopic systems, a challenging but important goal is to control the rate and direction of energy transfer. If one can control energy pathways simply by changing the character of the incoming light, there are immediate applications in bioimaging as well as improved strategies for advancing our fundamental understanding of microscopic energy transfer. In this talk, I will present a very simple idea for controlling excitonic transfer by utilizing higher excited states. The required math is rudimentary, with this first version of the concept not even requiring the consideration of most quantum mechanical effects. I will discuss how to overcome the main roadblocks to an experimental implementation, and elaborate on the design precision that would be required. See y'all there.

7 years, 8 months

[Aspuru-Guzik Group List] Group meeting, Thu July 28, 3:30 PM, Div Room

by Ian Kivlichan

Hi all, Tomorrow Nico will talk at group meeting. "Great Ideas" will resume next week for Dominic Berry's group meeting. (The schedule isn't updated because I can't edit Google Docs from my phone.) All the best, Ian ----------------------- Title: Choosing Exciton Transfer Pathways using Light Pulses Speaker: Nicolas Sawaya Abstract: In the design of nanoscopic systems, a challenging but important goal is to control the rate and direction of energy transfer. If one can control energy pathways simply by changing the character of the incoming light, there are immediate applications in bioimaging as well as improved strategies for advancing our fundamental understanding of microscopic energy transfer. In this talk, I will present a very simple idea for controlling excitonic transfer by utilizing higher excited states. The required math is rudimentary, with this first version of the concept not even requiring the consideration of most quantum mechanical effects. I will discuss how to overcome the main roadblocks to an experimental implementation, and elaborate on the design precision that would be required. See y'all there.

7 years, 9 months

[Aspuru-Guzik Group List] Chem242 Teaching Fellow with Rick Heller.

by Alan Aspuru-Guzik

Dear group members, The department is looking for a teaching fellow to teach Chem242 (graduate quantum mechanics) with Rick Heller. If anybody is interested, let me know TODAY as we need to make a decision soon about who would TF. Also, if people want to volunteer as potential TFs with me for the course I am teaching in the Spring (new course!) called "Physical Sciences 50: Simulating Matter" also e-mail me ASAP Third: I want everybody to install and join Slack. Doran Bennett has the keys to it. I will start making these announcements there rather than e-mail, so you will miss out if you don´t use it. Alan Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology Harvard University | 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru

7 years, 9 months

[Aspuru-Guzik Group List] Fwd: Aspuru-List post from levitov@exchange.mit.edu requires approval

by Alan Aspuru-Guzik

Excitonics people! This talk seems very relevant. Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology Harvard University | 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru ---------- Forwarded message ---------- From: <aspuru-list-owner(a)lists.fas.harvard.edu> Date: Wed, Jul 27, 2016 at 9:36 AM Subject: Aspuru-List post from levitov(a)exchange.mit.edu requires approval To: aspuru-list-owner(a)lists.fas.harvard.edu As list administrator, your authorization is requested for the following mailing list posting: List: Aspuru-List(a)lists.fas.harvard.edu From: levitov(a)exchange.mit.edu Subject: Re: Special Seminar TODAY - Oleg Koslov- 2PM- 66-144 Reason: Post by non-member to a members-only list At your convenience, visit: https://lists.fas.harvard.edu/mailman/admindb/aspuru-list to approve or deny the request. ---------- Forwarded message ---------- From: Leonid Levitov <levitov(a)exchange.mit.edu> To: Catherine M Bourgeois <cmbourg(a)mit.edu>, efrc-all <efrc-all(a)mit.edu> Cc: Date: Wed, 27 Jul 2016 09:36:53 -0400 Subject: Re: Special Seminar TODAY - Oleg Koslov- 2PM- 66-144 i will advertise it in our group but i am afraid most of people are away myself included On 07/27/2016 09:17 AM, Catherine M Bourgeois wrote: *TODAY* *Please post and forward to your groups* *----------------* *The William Tisdale Group Presents: * *Oleg V. Koslov, University of Groningen, The Netherlands* *“Watching molecular excitons move”* *Wednesday, July 27, 2016* *Room 66-144, 2:00 – 3:00pm* Oleg V. Kozlov1, Foppe de Haan1, Ross A. Kerner,2 Barry P. Rand2, David Cheyns3 and Maxim S. Pshenichnikov1 1 Zernike Institute for Advanced Materials, University of Groningen, The Netherlands 2 Department of Electrical Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, USA 3 imec, Leuven, Belgium *o.kozlov(a)rug.nl <o.kozlov(a)rug.nl>* Organic electronic devices are based on organic semiconductors, which combine attractive properties of organic materials with semiconducting behavior. The elementary excitation in these materials is a so-called “Frenkel exciton” – a strongly bound pair of negative (electron) and positive (hole) charges. As a result, organic electronics essentially rely on exciton diffusive dynamics that have to be controlled and observed to ensure the development of high-efficient organic devices. Here we watch the exciton diffusion process in real time with a new technique based on ultrafast photoinduced absorption spectroscopy with ~100 fs time resolution. Using vacuum-deposited C70 layers as a model system, we demonstrate an extremely high diffusion coefficient of *D* ≈ 3.5·10‑3 cm2/s that originates from surprisingly low energetic disorder of <5 meV. The experimental results are well-described by the analytical model and supported by extensive Monte-Carlo simulations. The proposed technique is deemed as a powerful tool for further development of organic opto-electronic components, such as simple layered solar cells, light-emitting diodes, and electrically pumped lasers. *Oleg V. (Viktorovich) Kozlov *received his Masters in Physics degree from Moscow State University, Faculty of Physics, in 2013. In 2009, he joined the research group of Professor Dmitry Paraschuk at Moscow State University, where he worked on device physics of organic solar cells and light emitting diodes. In 2012, he started a collaboration with Dr. Maxim Pshenichnikov (Zernike Institute for Advanced Materials, University of Groningen, the Netherlands) on ultrafast spectroscopy of novel organic molecules. In 2013, he moved to the same group as a PhD candidate, where he studies ultrafast charge and exciton dynamics (charge generation and recombination, exciton diffusion, singlet-to-triplet conversion, etc) in organic solids. ---------- Forwarded message ---------- From: aspuru-list-request(a)lists.fas.harvard.edu To: Cc: Date: Subject: confirm 8519c442b9118c211fb540297f823b7a1bfbb269 If you reply to this message, keeping the Subject: header intact, Mailman will discard the held message. Do this if the message is spam. If you reply to this message and include an Approved: header with the list password in it, the message will be approved for posting to the list. The Approved: header can also appear in the first line of the body of the reply.

7 years, 9 months

[Aspuru-Guzik Group List] Siria and Marlon Away on Friday, July 29th

by Siria Serrano

Group, Marlon and I will both be away this coming Friday, July 29th. Please forward all time sensitive requests, matters, to us before then. Cheers, Siria -- *Siria Serrano* *Faculty Assistant* *Aspuru-Guzik Group* *Harvard University **Department of Chemistry and Chemical Biology* *12 Oxford St. M 136* *Cambridge, MA 02138* *P:** (617) 496-1716 <%28617%29%20496-1716>** F: **617-496-9411 <617-496-9411>*

7 years, 9 months

[Aspuru-Guzik Group List] Special Seminar TODAY - Oleg Koslov- 2PM- 66-144

by Catherine M Bourgeois

TODAY Please post and forward to your groups ---------------- The William Tisdale Group Presents: Oleg V. Koslov, University of Groningen, The Netherlands “Watching molecular excitons move” Wednesday, July 27, 2016 Room 66-144, 2:00 – 3:00pm Oleg V. Kozlov1, Foppe de Haan1, Ross A. Kerner,2 Barry P. Rand2, David Cheyns3 and Maxim S. Pshenichnikov1 1 Zernike Institute for Advanced Materials, University of Groningen, The Netherlands 2 Department of Electrical Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, USA 3 imec, Leuven, Belgium o.kozlov(a)rug.nl<mailto:o.kozlov@rug.nl> Organic electronic devices are based on organic semiconductors, which combine attractive properties of organic materials with semiconducting behavior. The elementary excitation in these materials is a so-called “Frenkel exciton” – a strongly bound pair of negative (electron) and positive (hole) charges. As a result, organic electronics essentially rely on exciton diffusive dynamics that have to be controlled and observed to ensure the development of high-efficient organic devices. Here we watch the exciton diffusion process in real time with a new technique based on ultrafast photoinduced absorption spectroscopy with ~100 fs time resolution. Using vacuum-deposited C70 layers as a model system, we demonstrate an extremely high diffusion coefficient of D ≈ 3.5·10‑3 cm2/s that originates from surprisingly low energetic disorder of <5 meV. The experimental results are well-described by the analytical model and supported by extensive Monte-Carlo simulations. The proposed technique is deemed as a powerful tool for further development of organic opto-electronic components, such as simple layered solar cells, light-emitting diodes, and electrically pumped lasers. Oleg V. (Viktorovich) Kozlov received his Masters in Physics degree from Moscow State University, Faculty of Physics, in 2013. In 2009, he joined the research group of Professor Dmitry Paraschuk at Moscow State University, where he worked on device physics of organic solar cells and light emitting diodes. In 2012, he started a collaboration with Dr. Maxim Pshenichnikov (Zernike Institute for Advanced Materials, University of Groningen, the Netherlands) on ultrafast spectroscopy of novel organic molecules. In 2013, he moved to the same group as a PhD candidate, where he studies ultrafast charge and exciton dynamics (charge generation and recombination, exciton diffusion, singlet-to-triplet conversion, etc) in organic solids.

7 years, 9 months

[Aspuru-Guzik Group List] [qip] today

by Edward Farhi

Hi Quanta We are meeting today at 11:00 in 6-310. And at 3:00 today we have a talk by Or Sattath at 3:00 and tomorrow a talk by Dominic Berry at 3:00. See you! Eddie --------------------------------------------------------- Edward Farhi Cecil and Ida Green Professor of Physics Director Center for Theoretical Physics Massachusetts Institute of Technology 6-300 Cambridge Massachusetts 02139 617-253-4871 --------------------------------------------------------- _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

7 years, 9 months

[Aspuru-Guzik Group List] Special Seminar TOMORROW - Oleg Koslov- Watching Molecular Excitons Move

by Catherine M Bourgeois

Please post and forward to your groups ---------------- The William Tisdale Group Presents: Oleg V. Koslov, University of Groningen, The Netherlands “Watching molecular excitons move” Wednesday, July 27, 2016 Room 66-144, 2:00 – 3:00pm Oleg V. Kozlov1, Foppe de Haan1, Ross A. Kerner,2 Barry P. Rand2, David Cheyns3 and Maxim S. Pshenichnikov1 1 Zernike Institute for Advanced Materials, University of Groningen, The Netherlands 2 Department of Electrical Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, USA 3 imec, Leuven, Belgium o.kozlov(a)rug.nl Organic electronic devices are based on organic semiconductors, which combine attractive properties of organic materials with semiconducting behavior. The elementary excitation in these materials is a so-called “Frenkel exciton” – a strongly bound pair of negative (electron) and positive (hole) charges. As a result, organic electronics essentially rely on exciton diffusive dynamics that have to be controlled and observed to ensure the development of high-efficient organic devices. Here we watch the exciton diffusion process in real time with a new technique based on ultrafast photoinduced absorption spectroscopy with ~100 fs time resolution. Using vacuum-deposited C70 layers as a model system, we demonstrate an extremely high diffusion coefficient of D ≈ 3.5·10‑3 cm2/s that originates from surprisingly low energetic disorder of <5 meV. The experimental results are well-described by the analytical model and supported by extensive Monte-Carlo simulations. The proposed technique is deemed as a powerful tool for further development of organic opto-electronic components, such as simple layered solar cells, light-emitting diodes, and electrically pumped lasers. Oleg V. (Viktorovich) Kozlov received his Masters in Physics degree from Moscow State University, Faculty of Physics, in 2013. In 2009, he joined the research group of Professor Dmitry Paraschuk at Moscow State University, where he worked on device physics of organic solar cells and light emitting diodes. In 2012, he started a collaboration with Dr. Maxim Pshenichnikov (Zernike Institute for Advanced Materials, University of Groningen, the Netherlands) on ultrafast spectroscopy of novel organic molecules. In 2013, he moved to the same group as a PhD candidate, where he studies ultrafast charge and exciton dynamics (charge generation and recombination, exciton diffusion, singlet-to-triplet conversion, etc) in organic solids.

7 years, 9 months

[Aspuru-Guzik Group List] Progress Report - All Summer Undergraduates

by Marlon Cummings

Hi: For those who are supervising summer undergraduates, please take some time to prepare a 1-page report on their activities, progress, and goals at the end of their summer term. This is a great opportunity for you to sit and really engage the students -- easy going conversation. Please forward to me by July 31, 2016. Thanks, Marlon. ------------- *Marlon G. CummingsLab Manager, Aspuru-Guzik GroupMallinckrodt M136Department of Chemistry and Chemical BiologyHarvard University12 Oxford StreetCambridge, MA 02138617-496-9964617-496-9411 (fax)http://aspuru.chem.harvard.edu/ <http://aspuru.chem.harvard.edu/>*

7 years, 9 months

[Aspuru-Guzik Group List] Fwd: Swansea University - Postdoc position in quantum information

by Alan Aspuru-Guzik

---------- Forwarded message ---------- From: *Alan Aspuru-Guzik* <alan(a)aspuru.com> Date: Tuesday, July 26, 2016 Subject: Swansea University - Postdoc position in quantum information To: "Muller Markus." <Markus.Muller(a)swansea.ac.uk> Markus. Absolutely ! I hope all is well with you! Alan On Tuesday, July 26, 2016, Muller Markus. <Markus.Muller(a)swansea.ac.uk <javascript:_e(%7B%7D,'cvml','Markus.Muller(a)swansea.ac.uk');>> wrote: > *SaneAttachments*: The attachments in this email have been copied to > Dropbox by the magic of SaneBox <http://sanebox.com>. > > Postdoc_advert_MMueller_Swansea.pdf <https://db.tt/b9VNDzL8> - > Dropbox/SaneBox/Muller Markus_/Swansea University - Postdoc position i..., > 2016-07-26 11.53.22 AM/ > > * Click the link above or find it in Dropbox with the path of the file > provided next to the link. You can also forward this email as usual. Learn > more > <http://help.sanebox.com/customer/portal/articles/473528-sane-attachments>. > You still see the original attachments because some attachments are > impossible to strip. * > > ------------------------------ > > Hola Alan, > > I hope you are doing well. > > I am contacting you regarding an opening for a Postdoc position for > research in theoretical quantum information. I would very much appreciate > if you could bring the attached advertisement to the attention of suitable > candidates. > > Thank you very much and best wishes, > > Markus > > > > -- > Markus M??ller > Senior Lecturer > Department of Physics > Swansea University > > Vivian Building > Singleton Park > Swansea SA2 8PP, UK > > phone: +44 (0)1792 604925 > email: markus.muller(a)swansea.ac.uk > homepage: markus-mueller.website <http://www.markus-mueller.website> > > > -- Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology Harvard University | 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru -- Alán Aspuru-Guzik | Professor of Chemistry and Chemical Biology Harvard University | 12 Oxford Street, Room M113 | Cambridge, MA 02138 (617)-384-8188 | http://aspuru.chem.harvard.edu | http://about.me/aspuru

7 years, 9 months

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aspuru-list July 2016