Controlling laser spectra in a phaseonium photonic crystal using maser

Abstract

We study the control of quantum resonances in photonic crystals with electromagnetically induced transparency driven by microwave field. In addition to the control laser, the intensity and phase of the maser can alter the transmission and reflection spectra in interesting ways, producing hyperfine resonances through the combined effects of multiple scattering in the superstructure.

Appearance of bulk superconductivity under hydrostatic pressure in Sr0.5RE0.5FBiS2 (RE = Ce, Nd, Pr, and Sm) compounds

“…BiS 2 based superconductivity was first observed at around 4.5K in BiS 2 layers of Bi 4 O 4 S 3 compound [1,2]. Later the same was seen in REO/FBiS 2 [3][4][5][6][7][8][9][10][11][12] compounds. In short span of time, the BiS 2 based superconductivity attracted tremendous interest from the scientific community [1][2][3][4][5][6][7][8][9][10][11][12].…”

“…The situation seems to be in parallel with Fe and As hybridization in case of Fe pnictide (REO 1-x F x FeAs) superconductors [13]. No doubt, the BiS 2 based recent superconductivity is catching the attention of scientific community [1][2][3][4][5][6][7][8][9][10][11][12][14][15][16][17][18][19][20][21][22].…”

“…Also, the evolution of superconductivity is reported by substitution of tetravalent Th +4 , Hf +4 , Zr +4 , and Ti +4 for trivalent La +3 in LaOBiS 2 compound [27]. Interestingly, though in case of REO 1-x F x BiS 2 superconductivity is reported for RE=La, Pr, Nd and Ce [3][4][5][6][7][8][9][10][11][12], in SrFBiS 2 series only Sr 1-…”

Coherently Tunable Triangular Trefoil Phaseonium Metamaterial

“…Tunable metamaterials, where the ensemble or individual response of metamolecules can be varied by external stimuli, such as optical or magnetic fields, or mechanical deformations, are key to the development of a new generation of metadevices with optical response “on demand” 7 . “Coherent control” of the optical properties of metamaterials is an emerging area of research: quantum coherent effects were recently exploited in photonic crystals with controllable band pass 8 9 , lasing without inversion 10 11 12 13 , enhanced propagation of surface plasmon polaritons 14 , and modulation of coherent perfect absorption 15 16 .…”

“…The term phaseonium refers to quantum coherent materials comprising of three level, atomic-like systems, where electromagnetic transparency can be induced by a control laser 11 . In a three-level Λ scheme, optical properties of the phaseonium change as the result of quantum interference, when a laser field drives a transition 8 9 . In this work, we propose a new metamaterial structure made of a periodic array of triangular phaseonium metamolecules arranged as a trefoil that can display interesting optical properties including coupling of localized surface plasmon polaritons and gain.…”