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Prof. Dr. Menno Poot

Photo von Prof. Dr. Menno Poot.
Phone
+49 89 289-53555
Room
PH: 3071
E-Mail
menno.poot@tum.de
Links
Homepage
Page in TUMonline
Group
Quantum Technologies
Job Title
Professorship on Quantum Technologies

Courses and Dates

Title and Module Assignment
ArtSWSLecturer(s)Dates
Introduction to Condensed Matter Physics (in English) Assigned to modules:
VO 4 Poot, M. Mon, 12:00–14:00, PH II 227
Wed, 16:00–18:00, PH II 227
Journal Club Optomechanics and Quantum Optics Assigned to modules:
PS 1 Poot, M.
Exercise to Introduction to Condensed Matter Physics (in English) Assigned to modules:
UE 2
Responsible/Coordination: Poot, M.
dates in groups
Mentoring in the Bachelor's Program Physics (Professors K–Z) Assigned to modules:
KO 0.2 Kaiser, N. Kienberger, R. Knap, M. Krischer, K. Märkisch, B. … (insgesamt 25)
Responsible/Coordination: Höffer von Loewenfeld, P.
dates in groups
Revision Course to Journal Club Optomechanics and Quantum Optics This course is not assigned to a module.
RE 2
Responsible/Coordination: Poot, M.

Offered Bachelor’s or Master’s Theses Topics

2D optomechanics

Optomechanics is an extremely exciting field where the tiniest motions of mechanical resonators are measured with the help of laser light. So far, most of these experiments have been done with beams and cantilevers, in other words with one-dimensional structures. In the Quantum Technologies Lab we have just build a new setup, where we can measure the vibrations of 2D mechanical systems.

The goal of this project is to explore the world of 2D optomechanics. For this, we have two kinds of samples in mind: one is made from silicon nitride, which is a material with extremely high quality factors. This material is not only used in the manufacturing process of chips, but is also a great material to do optomechanics with. The other direction is to use materials that are just a few atoms thick: This includes graphene, boron nitride, and sandwiches of these true 2D materials. For this, we collaborate with the Karlsruhe Institute of Technology.

We will make the samples for you in the cleanroom, and it will be your goal to measure them with our new setup. This includes their optical characterization, as well as electrical measurements in the time domain (oscilloscope) and in the frequency domain (network- and spectrum analyzer). For the measurement and data processing, we already have a range of computer programs available in our group, so that you can start measuring right away. Depending on your preferences, the project could be completely experimental, or also contain a modelling component.

The project is envisioned with students in Applied and Engineering Physics (AEP) and Condensed Matter Physics (KM) in mind, but if you follow another track we are still interested to hear from you. Being curious and wanting to get a feeling for what doing real research is about, is the most important factor. There are no formal requirements on courses taken.

suitable as
  • Bachelor’s Thesis Physics
Supervisor: Menno Poot
High frequency optomechanical devices for quantum optomechanics

The smaller a device is, the higher its resonance frequency becomes. For our future quantum optomechanics experiments we will be working with mechanical resonators that operate at GHz frequencies and simultaneously couple strongly to light. Using mechanical and optical band structure calculations, you will design, make, and measure phononic and photonic cavities. The project involves nanofabrication in the cleanroom, as well as using the extreme sensitivity offered by on-chip optomechanics. We are aiming for devices made from silicon nitride, which has a lot of tensile stress in it. For micromechanical structures this material gives much better mechanical properties compared to, for example, silicon devices. An important aspect of the project is to understand if this is also true for the high frequency devices.

suitable as
  • Master’s Thesis Condensed Matter Physics
  • Master’s Thesis Applied and Engineering Physics
Supervisor: Menno Poot
Modelling single photon sources for optical quantum circuits

For quantum technology it is very important to have sources for single photons. One of the techniques that can be used to create these, is called spontaneous parametric down conversion, or SPDC for short. Here photons with a high frequency can split into two daughter photons with about half the frequency. An important point in this technique is so-called phase matching: the low and high frequency photons should travel at the same speed through the nonlinear material. This is often achieved by using special crystals that have to be oriented carefully. For applications we want to integrated these sources on photonic chips. In this project we will expore the phase matching in waveguides using photonic simulations of waveguides.

suitable as
  • Bachelor’s Thesis Physics
Supervisor: Menno Poot
Optomechanics with Single Photons

In optomechanics, light is used to measure and alter the dynamics of mechanical resonators. It is by far the most sensitive method to observe the tiny vibrations that nanomechanical devices perform: in one second one can determine their position with femtometer precision! Using light to measure the mechanics is not the only aspect of optomechanics. The same light can also be used to change the dynamics of the mechanical device through a process called cavity backaction. The photons exert a force on the resonator, the so-called radiation pressure. In this project we want to explore the ultimate limits to this force. The goal is to measure the force originating from a single photon! For this it is required that the photon interacts with the mechanical resonator as strongly as possible. For this we need to the design and make very low loss optical cavities, such as microring resonators. Also, the mechanical device should have a quality factor as high as possible. You will make both the optical and mechanical components from chips with highly-stressed silicon nitride using state-of-the-art nanofabrication in the cleanroom. Then the devices are placed in a vacuum chamber for their measurement. In our highly-automated setup you can very quickly characterize many of the devices on your chip. Then, with the perfect device parameters you can start to explore the more advanced measurements. Initially we can measure the devices in with pulsed light, but by using single photons we want to explore the ultimate limits to optomechanical forces.


See http://www.groups.ph.tum.de/en/qtech/openings/ for a detailed description of this project.

suitable as
  • Master’s Thesis Condensed Matter Physics
  • Master’s Thesis Applied and Engineering Physics
Supervisor: Menno Poot
Quantum Optics on a Chip

Quantum optics is an extremely powerful approach towards quantum communication, quantum sensing, and quantum computing. In particular, quantum information stored in photons has very low decoherence and can be transmitted over large distances through optical fibers. To date, most experiments in quantum optics use optical tables full with mirrors and beam splitters that all have to be carefully aligned and stabilized. This may be good enough for initial demonstrations, but in order to bring quantum science into the realm of quantum technology, a more scalable approach is required.

With our expertise in making photonic chips using advanced nanofabrication, we are making putting these exciting quantum optics experiments on chips. Here, light is routed via optical waveguides. Furthermore, by bending a waveguide, one gets the equivalent of a free-space mirror; a beam splitter cube becomes a directional coupler and so on. By combining these elements, we can make the building block for e.g. an optical quantum computer. With that, the possibilities are almost unlimited.

For such large-scale optical quantum circuits we also want to incorporate single-photon sources, superconducting single-photon detectors, and optomechanical phase shifters. This all happens on a single chip. Making and characterizing the components is the first step and from there on, you are making more and more complex quantum chips. You will be doing the nanofabrication in the cleanroom, and then use our optical measurement setups to see how each device is performing. Depending on your preference, it may also be possible to add a modelling component to the project.


See http://www.groups.ph.tum.de/en/qtech/openings/ for a detailed description of this project.

suitable as
  • Master’s Thesis Condensed Matter Physics
  • Master’s Thesis Applied and Engineering Physics
Supervisor: Menno Poot
Strong electrostatic effects in optomechanical devices

Optomechanics provides extremely sensitive methods to measure the displacement of mechanical resonators. However, the forces are much smaller in optomechanics compared to those in nanoelectromechanical systems (NEMS). The goal of the project is to make, and measure opto-electromechanical devices which have strong electrostatic interactions. This includes the electrostatic spring effect where the resonance frequency depends strongly on the applied voltage. The next step is trying to measure the potential by measuring the ringdown of different mechanical modes. The devices will be made using advanced nanofabrication techniques such as electron beam lithography and reactive ion etching.


See http://www.groups.ph.tum.de/en/qtech/openings/ for a detailed description of this project.

suitable as
  • Master’s Thesis Condensed Matter Physics
  • Master’s Thesis Applied and Engineering Physics
Supervisor: Menno Poot
Synchronization and nonlinear dynamics of nanomechanical oscillators

Synchronization is a universal phenomenon that is knows since they days of Huygens. When two or more oscillators with slightly different frequencies are coupled, they will start to move in phase. We can create small mechanical devices using advanced nanofabrication techniques here on campus. By sending light of the right wavelength, they start to oscillate, and when increasing the power the optomechanical coupling synchronizes them. The goal of this project is to synchronize devices made from silicon nitride, which is a special material with a lot of stress in it, and to increase the number of synchronized oscillators. The larger the system becomes, the richer the nonlinear dynamics will become. You will first make the devices in the cleanroom, measure them, and analyze the data.


See http://www.groups.ph.tum.de/en/qtech/openings/ for a detailed description of this project.

suitable as
  • Master’s Thesis Condensed Matter Physics
  • Master’s Thesis Applied and Engineering Physics
Supervisor: Menno Poot

Publications

Direct and parametric synchronization of a graphene self-oscillator
S. Houri (author), S. J. Cartamil-Bueno (author), M. Poot (author), P. G. Steeneken (author), H. S. J. van der Zant (author), W. J. Venstra (author)
2017-2-13
journal article
Applied Physics Letters
URL: https://doi.org/10.1063/1.4976310
DOI: 10.1063/1.4976310
Integrated optomechanical single-photon frequency shifter
Linran Fan (author), Chang-Ling Zou (author), Menno Poot (author), Risheng Cheng (author), Xiang Guo (author), Xu Han (author), Hong X. Tang (author)
2016-12-31
journal article
Nature Photonics
URL: https://doi.org/10.1038/nphoton.2016.206
DOI: 10.1038/nphoton.2016.206
Characterization of optical quantum circuits using resonant phase shifts
M. Poot (author), H. X. Tang (author)
2016-9-26
journal article
Applied Physics Letters
URL: https://doi.org/10.1063/1.4962902
DOI: 10.1063/1.4962902
Quantum interference in heterogeneous superconducting-photonic circuits on a silicon chip
C. Schuck (author), X. Guo (author), L. Fan (author), X. Ma (author), M. Poot (author), H. X. Tang (author)
2016-4-21
journal article
Nature Communications
URL: https://doi.org/10.1038/ncomms10352
DOI: 10.1038/ncomms10352
Cascaded optical transparency in multimode-cavity optomechanical systems
Fan, Linran, Fong, King Y., Poot, Menno, Tang, Hong X.
2015
journal article
Nature Communications
URL: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000348701400003&KeyUID=WOS:000348701400003
DOI: 10.1038/ncomms6850
WOSUID: WOS:000348701400003
Deep feedback-stabilized parametric squeezing in an opto-electromechanical system
Poot, M., Fong, K. Y., Tang, H. X.
2015
journal article
New Journal of Physics
URL: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000353941900005&KeyUID=WOS:000353941900005
DOI: 10.1088/1367-2630/17/4/043056
WOSUID: WOS:000353941900005
Nano-Optomechanical Resonators in Microfluidics
Fong, King Yan, Poot, Menno, Tang, Hong X.
2015
journal article
Nano Letters
URL: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000361252700070&KeyUID=WOS:000361252700070
DOI: 10.1021/acs.nanolett.5b02388
WOSUID: WOS:000361252700070
Broadband nanophotonic waveguides and resonators based on epitaxial GaN thin films
Alexander W. Bruch (author), Chi Xiong (author), Benjamin Leung (author), Menno Poot (author), Jung Han (author), Hong X. Tang (author)
2015-10-5
journal article
Applied Physics Letters
URL: https://doi.org/10.1063/1.4933093
DOI: 10.1063/1.4933093
Broadband nanoelectromechanical phase shifting of light on a chip
Poot, M., Tang, H. X.
2014
journal article
Applied Physics Letters
URL: http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000331803800001&KeyUID=WOS:000331803800001
DOI: 10.1063/1.4864257
WOSUID: WOS:000331803800001
Broadband nanoelectromechanical phase shifting of light on a chip
2014
journal article
Appl. Phys. Lett.
URL: http://scitation.aip.org/content/aip/journal/apl/104/6/10.1063/1.4864257
DOI: http://dx.doi.org/10.1063/1.4864257

further publications (total of 50).

See ORCID profile of Menno Poot as well.

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