| 학회 |
한국재료학회 |
| 학술대회 |
2014년 가을 (11/27 ~ 11/28, 대전컨벤션센터) |
| 권호 |
20권 2호 |
| 발표분야 |
제27회 신소재 심포지엄-나노 공정을 이용한 메타 신소재 |
| 제목 |
Full-field dynamic subwavelength light imaging using a scattering superlens |
| 초록 |
We demonstrate that multiple scattering can be controlled via wavefront shaping in order to obtain a sub-diffraction limited focus at an arbitrary position and the full-field dynamic sub-wavelength imaging. Due to the random structure of the highly scattering media there are no restrictions on the physical position of the focus giving the system a high degree of freedom. We first demonstrate that the multiple scattering can be used to steer and focus sub-diffraction limited light spots with arbitrary polarization or wavelength within its inhomogeneous structure. We also present that the full-field dynamic sub-wavelength imaging can be obtained by transferring the optical near-field into propagating far-field components by multiple light scattering from disordered nanoparticles, which was previously demonstrated in microwave regime. We achieve sub-wavelength light focusing by far-field wavefront control or imaging from a single-shot measurement of a speckle field. This new concept can be regarded as aperture-less scan-free near-field nanoscopy. Two-dimensional imaging can also be readily obtained by scanning the near-field focus or employing the concept of the transmission matrix. This technique can also be utilized for reflection-type optical tomography of biological tissue based on optical coherence tomography or digital phase conjugation technique for suppressing multiple light scattering. |
| 저자 |
박용근 |
| 소속 |
한국과학기술원 물리학과 |
| 키워드 |
광학; 이미징; 현미경; 초고해상도; 메타머터리얼
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| E-Mail |
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