Maximising Non-Linear Optical Performance in Polyoxometalate Derivatives
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Location
Gallaudet University - JSAC Multipurpose Room
Start Date
4-3-2024 11:30 AM
End Date
4-3-2024 12:00 PM
Description
Green laser pointers achieve their 532 nm light through second harmonic generation, a second-order non-linear optical (NLO) effect, using a 1064 nm Nd:YAG laser that interacts with an NLO material inside the laser pointer. My recent research at the University of East Anglia (UEA), UK focuses on molecular NLO chromophores featuring organic and inorganic/metallic parts. NLO effects arise when the electric field of intense laser incident light interacts with a molecule's electron cloud. To attain extreme effects (non-linear polarisation of the electron cloud), the electrons must be already pre-polarized (permanent dipole). Molecular NLO chromophores consist of three components: a donor with a surplus of electrons, a conjugated bridge, and an electron-deficient acceptor. In our systems, the acceptor is hexamolybdate, an octahedral polyoxometalate (POM) with six electron-deficient molybdenum metal atoms linked together by oxygen atoms. We call these hybrid NLO chromophores POMophores. The POM enables electrochemical toggling of NLO activity by reversibly adding and removing electrons to the cluster. In my presentation, I'll explore the design of these POMophores and the optimization of their NLO efficiency. I will also tell my story as a Deaf chemistry researcher in the UK.
Recommended Citation
Jones, Claire, "Maximising Non-Linear Optical Performance in Polyoxometalate Derivatives" (2024). Global Year of STEM Sign Language Summit. 7.
https://ida.gallaudet.edu/global_STEM_signlanguage/STEM_signlanguagesummit/day_3/7
Maximising Non-Linear Optical Performance in Polyoxometalate Derivatives
Gallaudet University - JSAC Multipurpose Room
Green laser pointers achieve their 532 nm light through second harmonic generation, a second-order non-linear optical (NLO) effect, using a 1064 nm Nd:YAG laser that interacts with an NLO material inside the laser pointer. My recent research at the University of East Anglia (UEA), UK focuses on molecular NLO chromophores featuring organic and inorganic/metallic parts. NLO effects arise when the electric field of intense laser incident light interacts with a molecule's electron cloud. To attain extreme effects (non-linear polarisation of the electron cloud), the electrons must be already pre-polarized (permanent dipole). Molecular NLO chromophores consist of three components: a donor with a surplus of electrons, a conjugated bridge, and an electron-deficient acceptor. In our systems, the acceptor is hexamolybdate, an octahedral polyoxometalate (POM) with six electron-deficient molybdenum metal atoms linked together by oxygen atoms. We call these hybrid NLO chromophores POMophores. The POM enables electrochemical toggling of NLO activity by reversibly adding and removing electrons to the cluster. In my presentation, I'll explore the design of these POMophores and the optimization of their NLO efficiency. I will also tell my story as a Deaf chemistry researcher in the UK.
