Optical activity of helical quantum-dot supercrystals


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Abstract

The size of chiral nanoparticles is much smaller than the optical wavelength. As a result, the difference in interaction of enantiomers with circularly polarized light of different handedness is practically unobservable. Due to the large mismatch in scale, the problem of enhancement of enantioselectivity of optical properties of nanoparticles is particularly important for modern photonics. In this work, we show that ordering of achiral nanoparticles into a chiral supercrystal with dimensions comparable to the wavelength of light allows achieving nearly total dissymmetry of optical absorption and demonstrate this using a helical super-crystal made of semiconductor quantum dots as an example. The proposed approach may find numerous applications in various optical and analytical methods used in biomedicine, chemistry, and pharmacology.

About the authors

A. S. Baimuratov

ITMO University

Email: tepliakov.nikita@gmail.com
Russian Federation, St. Petersburg, 197101

N. V. Tepliakov

ITMO University

Author for correspondence.
Email: tepliakov.nikita@gmail.com
Russian Federation, St. Petersburg, 197101

Yu. K. Gun’ko

ITMO University; School of Chemistry and CRANN Institute

Email: tepliakov.nikita@gmail.com
Russian Federation, St. Petersburg, 197101; Dublin 2

A. V. Baranov

ITMO University

Email: tepliakov.nikita@gmail.com
Russian Federation, St. Petersburg, 197101

A. V. Federov

ITMO University

Email: tepliakov.nikita@gmail.com
Russian Federation, St. Petersburg, 197101

I. D. Rukhlenko

ITMO University; Monash University, Clayton Campus

Email: tepliakov.nikita@gmail.com
Russian Federation, St. Petersburg, 197101; Clayton, Victoria, 3800

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