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Study of opto-electronic properties of trapped excitons in carbon nanotube devices

Contact: FILORAMO Arianna, ,, +33 1 69 08 86 35
Here will consider the study of the optical properties of chirality sorted nanotube devices. First, we will be interested in a drastic reduction of the distribution in chirality. Then, we will study the characteristics of the trapped excitonic states.
Possibility of continuation in PhD: Oui
Deadline for application:31/03/2023

Full description:
Thanks to their outstanding electrical, mechanical and chemical characteristics, carbon nanotubes have been demonstrated to be very promising building blocks for future nanoelectronic technologies. More recently, with the development of a better control of the material, other perspectives and fields of application have opened up.

This is particularly the case in optics, optoelectronics and photonics. Here, carbon nanotubes have attracted more attention because of their typical fundamental optical transition in the NIR [1-2] in a frequency range of interest for the telecommunications. This characteristic, combined with their exceptional electrical properties, has led to a great deal of interest in optoelectronic devices based on carbon nanotubes [3, 4, 5].

Here, we will perform optical and opto-electronic studies onto semiconducting nanotubes that we will extract from the pristine mixture by a method based on selective polymer wrapping [6-14]. In particular, we aim to reduce the distribution in chiralitiy to study the influence and characteristic of the trapped excitons by chemical functionalisation. Indeed, the comprehension of the related phenomena is extremely important to obtain performant devices at room temperature (photodetectors, LED, single photon sources, etc.) and to integrate them in a photonic platform [15-18].
Specifically, the integration within the photonic platform will be done in the framework of a collaborative project with C2N in Saclay while the non-linear optical studies will be performed at the Optics Institute of Bordeaux.

[1] S. M. Bachilo et al. Science 298, 2361 (2002) ; [2] O’Connell M. J. et al., Science 297, 593 (2002) ;
[3] Freitag et al., NanoLetter 6, 1425 (2006) ; [4] Mueller et al., NatureNanotech. 5, 27 (2010) ; [5] S.Wang et al. Nano Letter 11, 23 (2011);
[6] Nish, A. et al. Nat. Nanotechnol. 2, 640 (2007) ; [7] Chen, F. et al. Nano Lett. 7, 3013 (2007) ; [8] Nish, A. et al. Nanotechnology 19, 095603 (2008) ; [9] Hwang, J.-Y. et al., J. Am. Chem. Soc. 130, 3543-3553 (2008) ; [10] Gaufrès E. et al., Appl. Phys. Lett. 96, 231105 (2010) ; [11] Gao, J. et al. Carbon 49, 333 (2011) ; [12] Tange M. et al. ACS Appl. Mater. Interfaces 4, 6458 (2012) ; [13] Sarti F. et al Nano Research 9, 2478 (2016) ; [14] Balestrieri M. et al Advanced Functional Materials 1702341 (2017) ; [15] Margulis Vl.A. et al. Physica B 245, 173 (1998) ; [16] Arestegui O.S. Optical Materials 66, 281 (2017)
[17] Chu H. et al. Nanophotonics 9(4): 761 (2020) ; [18] Song B. et al. ACS Photonics 7, 2896 (2020)
Technics/methods used during the internship:
AFM, SEM, Micro and nanofabrication, transport measurements, optical spectroscopy, optoelectronics, nano-object manipulation

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