Femtosecond laser-induced CNT heterojunction as visible light photodetector

Aleksei V. Emelianov; Ivan I. Bobrinetskiy; Nerea Otero; Pablo M. Romero

doi:10.1117/12.2307610

17 May 2018 Femtosecond laser-induced CNT heterojunction as visible light photodetector

Aleksei V. Emelianov, Ivan I. Bobrinetskiy, Nerea Otero, Pablo M. Romero

Proceedings Volume 10683, Fiber Lasers and Glass Photonics: Materials through Applications; 106833B (2018) https://doi.org/10.1117/12.2307610
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

Carbon nanotubes (CNTs) are one of the most promising materials for advanced electronic applications, due to its extraordinary chemical and physical properties. Non-linear interactions between photons and carbon bonds provide the possibility to fabricate unique photonic devices. In this paper we present the new technological route of single walled CNTs (SWCNTs) modification using femtosecond (fs) laser pulses to produce junctions in nanotubes through multiphoton oxidation of the carbon lattice with nanoscale resolution. SWCNTs were deposited onto Si/SiO2 substrate using gas-phase process based on thermal decomposition of ferrocene in the presence of carbon monoxide. Source and drain 100/20 nm Au/Ti electrodes were fabricated by photolithography, the gate electrode was p++ Si substrate. Samples were irradiated via fs laser with different energy fluence. Fs laser pulses at low energies were used to perform photocurrent measurements. Not modified SWCNTs and structures modified upon fs laser demonstrate a huge difference for light induced charge generation. We observed significant changes in optical and electrical properties of SWCNTs after the modification. Varying the parameters of power and laser scanning speed we can change the level of local oxidation of SWCNT and photocurrent in produced photodetectors.

Citation Download Citation

Aleksei V. Emelianov, Ivan I. Bobrinetskiy, Nerea Otero, and Pablo M. Romero "Femtosecond laser-induced CNT heterojunction as visible light photodetector", Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 106833B (17 May 2018); https://doi.org/10.1117/12.2307610

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available