POLARIZATION SPECTROSCOPY

Research directions / Objectives

  1.       Development of cavity-enhanced polarimetry (for improvement of sensitivity and time resolution).
  2.       Development of cavity-enhanced ellipsometry (for improvement of sensitivity and time resolution).
  3.       Measurement of atomic parity-nonconservation in Iodine, Xenon, and Mercury.
  4.       Production of spin-polarized atoms and molecules. 

HIGHLIGHTS

 

· Demonstration of new cavity-enhanced polarimetry techniques:

       a) Cavity Ring-Down Ellipsometry (CRDE) [J. Chem. Phys. 31, 121101 (2009)].

       b) Evanescent-Wave Cavity Ring-Down Ellipsometry (EW-CRDE) [US patent pending].

       c) Chiral-Cavity Ring-Down (CCRD) [Phys. Rev. Lett. 108, 210801 (2012), patent pending].

· First measurement of the complete three-dimensional steric effect in a bimolecular chemical reaction (dependence of reactivity on approach geometry) [F. Wang, K. Liu, T.P. Rakitzis, Nature Chemistry 4, 636 (2012)].

· Proposal and demonstration for the pulsed-laser production of spin-polarized atoms and molecules by the time-dependent transfer of polarization from molecular rotational polarization via the hyperfine interaction [T.P. Rakitzis,Phys. Rev. Lett. 94, 83005 (2005)].

· First observation of the photofragment recoil deflection angle, from the photodissociation of OCS molecules three-dimensionally “fixed-in-space” [Rakitzis et al., Science  303, 1852 (2004)].

  •  Production of spin-polarized hydrogen atoms from pulsed molecular photodissociation at high density [Rakitzis et al., Science  300, 1936 (2003)], and pulsed laser-detection.

 

Research Topics

Reasearch interest 1 for gorup Polarization

Ultrasensitive chiral detection by signal-reversing cavity polarimetry: applications to in-situ proteomics, single-molecule chirality, HPLC analysis, medical diagnostics, and atmospheric studies

Heads

Prof. Rakitzis Peter
University Faculty Member

Research Associates

Dr. Katsoprinakis George
PostDoctoral Fellow
Mr. Spiliotis Alexandros
PostDoctoral Fellow

Students

Ms. Stamataki Katerina
Ph.D. student
Mr. Chrysovalantis Kannis
Ph.D. student
Ms. Toutoudaki Eirini
M.Sc. student
Mr. Xygkis Michalis
Ph.D. student
Ms. Sargianni Zoi
Undergraduate trainee
Ms. Choudalaki Theodora
Undergraduate trainee
Ms. Kolla Maria
Undergraduate trainee
Ms. Viha Nasia
Undergraduate trainee
Mr. Koutrakis Michalis
Undergraduate trainee
Mr. Tazes Kostas
M.Sc. student

Alumni

Dr. Sofikitis Dimitris
PostDoctoral Fellow