TY - GEN

T1 - Enhancing resolution of terahertz surface plasmon resonance microscopy by classical ghost imaging using free electron laser radiation

AU - Khasanov, I. Sh

AU - Knyazev, B. A.

AU - Nikitin, A. K.

AU - Gerasimov, V. V.

AU - Zykova, L. A.

AU - Trang, T. T.

N1 - Funding Information: The reported study was funded by RFBR under research project 202-54-5 004 and VAST (project QTR01.0U 3/20-21). The simulations were performed for the experiments started at the Shared research center SSTRC based on the Novosibirsk FEL complex at BINP SB RAS, using equipment supported by project RFMEFI62119X0022. The authors grateful to P.A. Nikitin for the valuable conversation. Publisher Copyright: © 2020 American Institute of Physics Inc. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/11/17

Y1 - 2020/11/17

N2 - Surface plasmon resonance (SPR) microscopy is one of the most sensitive label-free microscopy methods, however with low lateral resolution. This drawback is primarily caused by the fact that surface plasmon polaritons (SPPs) excited by terahertz (THz) radiation propagate macro distances (about ~100 Ȝ) from their excitation spot, thereby blurring the observed region, like with a scattering medium. To eliminate this disadvantage, we adapt a method known as ghost imaging (GI), which is notable for its tolerance to environmental aberrations between the object and camera. We propose an optical scheme of SPR microscopy for the THz range with an additional optical arm to implement the classical GI and provide an analysis of factors affecting the image quality. To implement the classical GI in the THz range, we propose to use the Novosibirsk free electron laser (NovoFEL) as a THz radiation source. The high beam power of the NovoFEL provides a speckle structure with a pronounced profile, which is required to achieve a high level of contrast in the obtained image. Moreover, the large coherence length of the NovoFEL radiation is necessary to ensure a large degree of correlation between the beams emerging from the beam splitter, which allows reconstructing an image with a lower noise level.

AB - Surface plasmon resonance (SPR) microscopy is one of the most sensitive label-free microscopy methods, however with low lateral resolution. This drawback is primarily caused by the fact that surface plasmon polaritons (SPPs) excited by terahertz (THz) radiation propagate macro distances (about ~100 Ȝ) from their excitation spot, thereby blurring the observed region, like with a scattering medium. To eliminate this disadvantage, we adapt a method known as ghost imaging (GI), which is notable for its tolerance to environmental aberrations between the object and camera. We propose an optical scheme of SPR microscopy for the THz range with an additional optical arm to implement the classical GI and provide an analysis of factors affecting the image quality. To implement the classical GI in the THz range, we propose to use the Novosibirsk free electron laser (NovoFEL) as a THz radiation source. The high beam power of the NovoFEL provides a speckle structure with a pronounced profile, which is required to achieve a high level of contrast in the obtained image. Moreover, the large coherence length of the NovoFEL radiation is necessary to ensure a large degree of correlation between the beams emerging from the beam splitter, which allows reconstructing an image with a lower noise level.

UR - http://www.scopus.com/inward/record.url?scp=85096497060&partnerID=8YFLogxK

U2 - 10.1063/5.0030496

DO - 10.1063/5.0030496

M3 - Conference contribution

AN - SCOPUS:85096497060

T3 - AIP Conference Proceedings

BT - Synchrotron and Free Electron Laser Radiation

A2 - Knyazev, Boris

A2 - Vinokurov, Nikolay

PB - American Institute of Physics Inc.

T2 - 2020 Internetional Conference on Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020

Y2 - 13 July 2020 through 16 July 2020

ER -