First Experimental Demonstration of the Wide-Field Amplitude Surface Plasmon Resonance Microscopy in the Terahertz Range
Vasiliy Valerievich Gerasimov,
Oleg Eduardovich Kameshkov,
Alexey Konstantinovich Nikitin,
Ildus Shevketovich Khasanov,
Alexey Georgievich Lemzyakov,
Irina Veniaminovna Antonova,
Artem Ilyich Ivanov,
Nghiem Thi Ha Lien,
Nguyen Trong Nghia,
Le Tu Anh,
Nguyen Quoc Hung,
Ta Thu Trang
Affiliations
Vasiliy Valerievich Gerasimov
Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, 11, Lavrentiev Prospect, 630090 Novosibirsk, Russia
Oleg Eduardovich Kameshkov
Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, 11, Lavrentiev Prospect, 630090 Novosibirsk, Russia
Alexey Konstantinovich Nikitin
Scientific and Technological Centre of Unique Instrumentation of RAS, 15, Bytlerova Street, 117342 Moscow, Russia
Ildus Shevketovich Khasanov
Scientific and Technological Centre of Unique Instrumentation of RAS, 15, Bytlerova Street, 117342 Moscow, Russia
Alexey Georgievich Lemzyakov
Budker Institute of Nuclear Physics, Siberian Branch of the Russian Academy of Sciences, 11, Lavrentiev Prospect, 630090 Novosibirsk, Russia
Irina Veniaminovna Antonova
Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentiev Aven., 630090 Novosibirsk, Russia
Artem Ilyich Ivanov
Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentiev Aven., 630090 Novosibirsk, Russia
Nghiem Thi Ha Lien
Institute of Physics, Vietnam Academy of Science and Technology, 10, Daotan, Badinh, Hanoi 11935, Vietnam
Nguyen Trong Nghia
Institute of Physics, Vietnam Academy of Science and Technology, 10, Daotan, Badinh, Hanoi 11935, Vietnam
Le Tu Anh
Vietnam Academy of Science and Technology, University of Science and Technology of Hanoi, 18 Hoang Quoc Viet, Cau Giay, Hanoi 11307, Vietnam
Nguyen Quoc Hung
Nano and Energy Center, VNU University of Science, Vietnam National University, 334, Nguyen Trai, Thanh Xuan, Hanoi 11935, Vietnam
Ta Thu Trang
Joint Vietnam-Russia Tropical Science and Technology Research Center, Institute of Tropical Durability, 63 Nguyen Van Huyen, Cau Giay District, Hanoi 11307, Vietnam
We have demonstrated the wide-field amplitude surface plasmon resonance (SPR) microscopy technique in the terahertz (THz) range. A Zeonex polymer prism was utilized to excite surface plasmon polaritons (SPPs) through attenuated total reflection (ATR) in an Otto configuration. Coherent quasimonochromatic radiation with a wavelength of approximately 197 μm, generated by the Novosibirsk free electron laser, was employed. Our results indicate that the SPR microscopy method is applicable for investigating the planar surfaces of semiconductors at THz frequencies, provided that the SPPs’ cutoff frequency is close to the probing radiation frequency. This condition ensures that the propagation length of the SPPs is comparable to the radiation wavelength. By varying the air gap between the prism and the surface under examination, we acquired images of a polypropylene coating 20 µm thick and a graphene coating 35 nm thick on a flat indium antimonide substrate. The boundary between the coated and uncoated regions can be precisely localized through determination of the kink in the reflection coefficient of the THz radiation beam that illuminates the boundary between the regions if the optimal conditions for the generation of the SPPs in the uncoated region are met.
