Quantum lithography by coherent control of classical light pulses

Details Quantum lithography by coherent control of classical light pulses Quantum lithography by coherent control of classical light pulses

2004-11-22

arxiv.org/abs/quant-ph/0411163v1

Opt. Express. 12, 6600 (2004)

Physics

Quantum Physics

6 pages, 4 figures, Submitted to Opt. Express

Scientific paper

10.1364/OPEX.12.006600

The smallest spot in optical lithography and microscopy is generally limited by diffraction. Quantum lithography, which utilizes interference between groups of N entangled photons, was recently proposed to beat the diffraction limit by a factor N. Here we propose a simple method to obtain N photons interference with classical pulses that excite a narrow multiphoton transition, thus shifting the "quantum weight" from the electromagnetic field to the lithographic material. We show how a practical complete lithographic scheme can be developed and demonstrate the underlying principles experimentally by two-photon interference in atomic Rubidium, to obtain focal spots that beat the diffraction limit by a factor of 2.

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