Скачать или смотреть Quantitative phase microscopy for nanophotonics | Dr. Guillaume Baffou

Dr. Guillaume Baffou, Institut Fresnel — CNRS, France. Optical Seminar at The Department of Physics & Engineering, ITMO | 07/10/2020
Title: "Quantitative phase microscopy for nanophotonics"
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Abstract:
Quadriwave lateral shearing interferometry (QLSI) is a quantitative phase microscopy technique that enables the mapping of the wavefront distorsion of a light beam with both high spatial resolution and high sensitivity. In this presentation, I explain how QLSI recently proved efficient to advance the field of nanophotonics, namely, (i) how QLSI can be used as a temperature microscopy technique to map the temperature of gold nanoparticles under illumination, enabling applications in physics, chemistry and biology at the nano/microscale; (ii) how QLSI can measure the complex optical conductivity of 2D materials; (iii) and finally how QLSI can retrieve the complex optical polarizability of nanoparticles, along with the extinction, scattering and absorption cross section from a single interferogram image.

00:00:00 Start
00:00:11 Introduction to phase imaging

00:02:53 Part 1. Quadriwave lateral shearing interferometry (QLSI) introduction

00:05:25 Part 2. Nanoparticle imaging with QLSI
00:07:38 Question from the chat by Dr. Ivan Sinev

00:15:13 Questions by George Zograf

00:17:07 Part 3. QLSI for 2D materials
00:21:18 Questions by George Zograf

00:25:28 Question from the chat by Dr. Ivan Sinev

00:26:33 Part 4. Temperature measurements of plasmonics with QLSI

00:38:48 Part 5. Living cells heating and thermometry

00:45:28 End of the talk by Dr. Guillaume Baffou
00:45:43 Discussion with Dr. Ivan Sinev
00:48:46 Duestion by George Zograf
00:50:53 Closing remarks of the seminar

The Department of Physics and Engineering of ITMO University (Saint Petersburg, Russia) hosts online weekly seminars to discuss recent scientific achievements of researchers from all over the world with a wide audience. The topics include experimental (Optical seminar) and theoretical (Theoretical seminar) aspects of nanophotonics, solid-state physics, material science, as well as design and applications of radiofrequency structures and devices (Microwave seminar).

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