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Bulgakova V, Chizhov P, Ushakov A, Ratnikov P, Goncharov Y, Martyanov A, Kononenko V, Savin S, Golovnin I, Konov V, Garnov S. Optical Pump-Terahertz Probe Diagnostics of the Carrier Dynamics in Diamonds. MATERIALS (BASEL, SWITZERLAND) 2023; 17:119. [PMID: 38203973 PMCID: PMC10779634 DOI: 10.3390/ma17010119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/12/2024]
Abstract
Diamond is a promising material for terahertz applications. In this work, we use a non-invasive optical pump-terahertz probe method to experimentally study the photoinduced carrier dynamics in doped diamond monocrystals and a new diamond-silicon composite. The chemical vapor deposited diamond substrate with embedded silicon microparticles showed two photoinduced carrier lifetimes (short lifetime on the order of 4 ps and long lifetime on the order of 200 ps). The short lifetime is several times less than in boron-doped diamonds and nitrogen-doped diamonds which were grown using a high temperature-high pressure technique. The observed phenomenon is explained by the transport of photoexcited carriers across the silicon-diamond interface, resulting in dual relaxation dynamics. The observed phenomenon could be used for ultrafast flexible terahertz modulation.
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Affiliation(s)
- Vladislava Bulgakova
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
| | - Pavel Chizhov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Alexander Ushakov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
| | - Pavel Ratnikov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
| | - Yuri Goncharov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
| | - Artem Martyanov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
| | - Vitali Kononenko
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
| | - Sergey Savin
- Nanocenter MIREA, MIREA—Russian Technological University, 119454 Moscow, Russia
| | - Ilya Golovnin
- Faculty of Physics, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Vitaly Konov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
| | - Sergey Garnov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, 119991 Moscow, Russia; (P.C.)
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Ali B, Xu H, Chetty D, Sang RT, Litvinyuk IV, Rybachuk M. Laser-Induced Graphitization of Diamond Under 30 fs Laser Pulse Irradiation. J Phys Chem Lett 2022; 13:2679-2685. [PMID: 35302380 DOI: 10.1021/acs.jpclett.2c00429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The degree of laser-induced graphitization from a sp3-bonded to a sp2-bonded carbon fraction in a single crystal chemical vapor deposited (CVD) diamond under varying fluence of an ultrashort pulsed laser (30 fs, 800 nm, 1 kHz) irradiation has been studied. The tetrahedral CVD sp3 phase is found to transition to primarily an sp2 aromatic crystalline graphitic fraction below the critical fluence of 3.9 J/cm2, above which predominantly an amorphous carbon is formed. A fractional increase of fluence from 3.3 to 3.9 J/cm2 (∼20%) results in a substantially (∼3-fold) increased depth of the sp2 graphitized areas owing to the nonlinear interactions associated with a fs laser irradiation. Additionally, formation of a C═O carbonyl group is observed below the critical threshold fluence; the C═O cleavage occurrs gradually with the increase of irradiation fluence of 30 fs laser light. The implications for these findings on enhancement of fs driven processing of diamonds are discussed.
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Affiliation(s)
- Bakhtiar Ali
- School of Engineering and Built Environment, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
- Centre for Quantum Dynamics and Australian Attosecond Science Facility, Griffith University, Science Road, Nathan, QLD 4111, Australia
| | - Han Xu
- Centre for Quantum Dynamics and Australian Attosecond Science Facility, Griffith University, Science Road, Nathan, QLD 4111, Australia
- School of Environment and Science, Griffith University, Nathan QLD 4111, Australia
| | - Dashavir Chetty
- Centre for Quantum Dynamics and Australian Attosecond Science Facility, Griffith University, Science Road, Nathan, QLD 4111, Australia
- School of Environment and Science, Griffith University, Nathan QLD 4111, Australia
| | - Robert T Sang
- Centre for Quantum Dynamics and Australian Attosecond Science Facility, Griffith University, Science Road, Nathan, QLD 4111, Australia
- School of Environment and Science, Griffith University, Nathan QLD 4111, Australia
| | - Igor V Litvinyuk
- Centre for Quantum Dynamics and Australian Attosecond Science Facility, Griffith University, Science Road, Nathan, QLD 4111, Australia
- School of Environment and Science, Griffith University, Nathan QLD 4111, Australia
| | - Maksym Rybachuk
- School of Engineering and Built Environment, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia
- Centre for Quantum Dynamics and Australian Attosecond Science Facility, Griffith University, Science Road, Nathan, QLD 4111, Australia
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