Experimental observation of flat focusing mirror based on photonic jet effect

Igor V. Minin, Cheng Yang Liu*, Yu Chih Yang, Kestutis Staliunas, Oleg V. Minin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


In this work, we experimentally demonstrate that a thin rectangle dielectric-metal structure can have a function of a flat focusing mirror based on photonic jet effect in reflection mode. Using polydimethylsiloxane (PDMS) rectangle with size length of 10 μm and wavelength-scale thickness of 1 μm on the top of a silicon wafer, we have built a flat mirror which focuses an incident beam at the focal length changing from 1.38 μm to 11.67 μm upon tuning the beam incidence angle from 30° to 75°. The focusing properties of such a mirror persist in the wavelength range of 405 nm to 671 nm. Our approach can be extended to realize other optical functionalities by properly controlling rectangle dimensions and materials. This flat focusing mirror is able to guide the incident beam in free space without perceptible diffraction at the distance equal to the photonic jet length and suitable for small-scale photonic circuits.

Original languageEnglish
Article number8459
JournalScientific reports
Issue number1
StatePublished - 1 Dec 2020


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