Tunable negative refraction without absorption via electromagnetically induced chirality

J Kästel, M Fleischhauer, SF Yelin, RL Walsworth - Physical review letters, 2007‏ - APS
We show that negative refraction with minimal absorption can be obtained by means of
quantum interference effects similar to electromagnetically induced transparency (EIT) …

Negative refractive index metamaterials in optics

NM Litchinitser, IR Gabitov, AI Maimistov, VM Shalaev - Progress in Optics, 2008‏ - Elsevier
Publisher Summary Recent advances in nanofabrication have led to the demonstration of a
novel class of optical materials—metamaterials—that are artificially engineered structures …

Electromagnetically induced left handedness in optically excited four-level atomic media

Q Thommen, P Mandel - Physical review letters, 2006‏ - APS
We show that left-handed properties can be electromagnetically induced in a general four-
level atomic medium for a finite spectral range. We use an electric (magnetic) atomic …

Ray optics at a deep-subwavelength scale: a transformation optics approach

S Han, Y **ong, D Genov, Z Liu, G Bartal, X Zhang - Nano Letters, 2008‏ - ACS Publications
We present a transformation optics approach for molding the light flow at the deep-
subwavelength scale, using metamaterials with uniquely designed dispersion. By conformal …

Arbitrarily thin metamaterial structure for perfect absorption and giant magnification

Y **, S **ao, NA Mortensen, S He - Optics express, 2011‏ - opg.optica.org
In our common understanding, for strong absorption or amplification in a slab structure, the
desire of reducing the slab thickness seems contradictory to the condition of small loss or …

Quantum left-handed metamaterial from superconducting quantum-interference devices

C Du, H Chen, S Li - Physical Review B—Condensed Matter and Materials …, 2006‏ - APS
A scheme for a kind of quantum left-handed metamaterial is proposed, which is composed of
an array of superconducting quantum-interference devices and a dielectric background …

Negative refraction of light in an atomic medium

L Ruks, KE Ballantine, J Ruostekoski - Nature Communications, 2025‏ - nature.com
The quest to manipulate light propagation in ways not possible with natural media has
driven the development of artificially structured metamaterials. One of the most striking …

Quantum metrology with one auxiliary particle in a correlated bath and its quantum simulation

WT He, HY Guang, ZY Li, RQ Deng, NN Zhang… - Physical Review A, 2021‏ - APS
In realistic metrology, entangled probes are more sensitive to noise, especially for a
correlated environment. The precision of parameter estimation with entangled probes is …

Refractive index enhancement with vanishing absorption in an atomic vapor

NA Proite, BE Unks, JT Green, DD Yavuz - Physical review letters, 2008‏ - APS
We report a proof-of-principle experiment where the refractive index of an atomic vapor is
enhanced while maintaining vanishing absorption of the beam. The key idea is to drive …

Negative refraction with low absorption using Raman transitions with magnetoelectric coupling

DE Sikes, DD Yavuz - Physical Review A—Atomic, Molecular, and Optical …, 2010‏ - APS
We suggest a scheme for obtaining negative refraction that does not require the
simultaneous presence of an electric-dipole and a magnetic-dipole transition near the same …