Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Broadband Optical Activity Spectroscopy with Interferometric Fourier-Transform Balanced Detection

Title data

Gosh, Soumen ; Herink, Georg ; Perri, Antonio ; Preda, Fabrizio ; Manzoni, Cristian ; Polli, Dario ; Cerullo, Giulio:
Broadband Optical Activity Spectroscopy with Interferometric Fourier-Transform Balanced Detection.
In: ACS Photonics. (July 2021) .
ISSN 2330-4022
DOI: https://doi.org/10.1021/acsphotonics.0c01866

Official URL: Volltext

Project information

Project financing: European Research Council (Consolidator Grant VIBRA, ERC-2014-CoG 648615, Proof-of-Concept Grant CHIMERA, ERC-PoC-2016 754802), Marie Sklodowska-Curie Actions (project CHIRALSCOPY H2020-MSCA-IF-2018-841356), European Union’s Horizon 2020 research and innovation program under grant agreement no. 814492 (project SimDOME).

Abstract in another language

Spectrally resolved measurements of optical activity, such as circular dichroism (CD) and optical rotatory dispersion (ORD), are powerful tools to study chiroptical properties of (bio)molecular and nanoplasmonic systems. The wider utilization of these techniques, however, has been impeded by the bulky and slow design of conventional spectropolarimeters, which have been limited to a narrowband scanning approach for more than 50 years. In this work, we demonstrate broadband measurements of optical activity by combining a balanced detection scheme with interferometric Fourier-transform spectroscopy. The setup utilizes a linearly polarized light field that creates an orthogonally polarized weak chiral free-induction-decay field, along with a phase-locked achiral transmitted signal, which serves as the local oscillator for heterodyne amplification. By scanning the delay between the two fields with a birefringent common-path interferometer and recording their interferogram with a balanced detector that measures polarization rotation, broadband CD and ORD spectra are retrieved simultaneously with a Fourier transform. Using an incoherent thermal light source, we achieve state-of-the-art sensitivity for CD and ORD across a broad wavelength range in a remarkably simple setup. We further demonstrate the potential of our technique for highly sensitive measurements of glucose concentration and the real-time monitoring of ground-state chemical reactions. The setup also accepts broadband pulses and will be suitable for broadband transient optical activity spectroscopy and broadband optical activity imaging.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: chirality; optical activity; circular dichroism; heterodyne spectroscopy; balanced detection; time domain interferometry
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VIII - Ultrafast Dynamics
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 16 Jul 2021 06:57
Last Modified: 16 Jul 2021 06:57
URI: https://eref.uni-bayreuth.de/id/eprint/66557