Coming soon - polaritonic hypercrystals.
The picture on the right is our measurement of a 100nm pitch crystal
The picture on the right is our measurement of a 100nm pitch crystal
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Our recent work shows it's possible to do reliable and high quality nanolithography of periodic structures with a sub-20nm pitch, a record breaking achievement, using a combination of He FIB and techniques inspired by 2D materials.
Preprint is here |
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It is conventional wisdom in annophotonics that plasmons can confine light to very small volumes, at the expense of absorption. However, our recent work shows hyperbolic polaritons to nanoscale volumes, while keeping the quality factor large, paving the way to extremely large Purcell enhancement and ultrastrong light matter interaction. Preprint is here Check also our (related) theoretical results on multimodal ray propagation in hyperbolic media |
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Phonon poalritons dynamics visualzied with free electrons
2D superconductor based bolometric photodetector
Nano imaging response in small twist angle graphene
2D superconductor based bolometric photodetector
Nano imaging response in small twist angle graphene
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Atomic scale changes to a structure, say adding 6 atoms to the thickness of a single layer in a structure, should be imperceptible to optical wavelength measurement.
Yet, in the vicinity of an exceptional point, they can be. Anderson localization, extreme sensitivity and non-hermitian physics all come together... check out our Science paper! |
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Can Anderson localization be induced in a disordered structure whose features are deep subwavelength? Say a thousand times smaller than the wavelength?
Delve into the realm of extreme fine features and find how this (and other counter intuitive behaviors) comes about. |
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Effective medium theory tells us a wave averages over the subwavelength sized features of a dielectric structure, but is this always the case ? We examine a seemingly simple structure and show that for certain angles of incidence phase is accumulated mostly through reflections and the effective medium description breaks down completely.
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How can we measure the polarization of a laser so intense that it focuses itself and turns air into plasma ? The answer, surprisngly, can be obtained by looking at how a simple piece of metal is charred.
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How do you make an optical structure for a laser whose intensity is so high it can vaporize solid metal ?
Make your structure out of plasma jets.
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Make your structure out of plasma jets.
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