Abstract: A method is provided for modifying a wavelength of electromagnetic radiation that propagates through a medium. The method includes providing a medium that exhibits a change in refractive index in response to a change in electric field; impinging electromagnetic radiation from a electromagnetic radiation source onto the medium such that the electromagnetic radiation propagates through the medium; and modifying at least one wavelength of the electromagnetic radiation propagating through the medium by externally inducing a temporal change in the refractive index of the medium.

Abstract: A harness manufactured from transverse and longitudinal fabric belts with adjustable buckles attached to the ends of the belts and shoulder straps attached to the longitudinal belts that while fastened around the suitcase converts a carry-on suitcase into a backpack. At least one transverse fabric belt is intended to be strapped around the suitcase and two longitudinal belts strapped around the suitcase in longitudinal direction. The adjustable buckles provide tightening of the belts strapped around the suitcase. The shoulder straps attached to the longitudinal belts allows carrying the suitcase on ones back in easy and convenient manner.