Abstract
The control of electromagnetic radiation in transformation optical metamaterials brings the development of vast variety of optical devices. Of a particular importance is the possibility to control the propagation of light with light. In this work, we use a structured planar cavity to enhance the thermo-optic effect in a transformation optical waveguide. In the process, a control laser produces apparent inhomogeneous refractive index change inside the waveguides. The trajectory of a second probe laser beam is then continuously tuned in the experiment. The experimental results agree well with the developed theory. The reported method can provide a new approach toward development of transformation optical devices where active all-optical control of the impinging light can be achieved.
Highlights
The control of electromagnetic radiation in transformation optical metamaterials brings the development of vast variety of optical devices
The reported method can provide a new approach toward development of transformation optical devices where active all-optical control of the impinging light can be achieved
The maximal effect is achieved if the pump laser wavelength is tuned to a particular Fabry-Perot (FP) resonance of the waveguide, note that the silver/PMMA/silver waveguide acts as a cavity for external radiation
Summary
The control of electromagnetic radiation in transformation optical metamaterials brings the development of vast variety of optical devices. A large variety of transformation optics[6,7] (TO) devices based on such inhomogeneous metamaterials have been proposed including invisibility cloaks[8,9,10,11], illusion optics[12,13,14], Luneberg lens[15], photonic black holes[16,17,18,19], nanofocusing plasmonics[20,21,22], etc To facilitate such optical phenomenon, systems based on split-ring resonators[5,23,24], porous silicon wafer[25,26,27], multilayers[28,29,30,31,32,33], graded lithography[15], inhomogeneous waveguide[34,35], electriccontrolled graphene[36], mixture solutions[37,38], macroscopic crystal[39,40,41,42] have been studied. The reported method offers a new approach toward light-controllable transformation optical devices
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