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Physica Scripta

Tunnelling based birefringent rotary photon dragging through induced chiral medium

Muhammad Junaid Iqbal Khan, Muhammad Idrees, Bakht Amin Bacha, Arif Ullah, Muhammad Haneef

Published Feb 11, 2021• 19 citations
Publisher

Abstract

Abstract The control and modification of divergence angle and birefringent rotary photon drags under the effect of quantum tunnelling is investigated in this article. The circularly birefringence Δ n = n r ( + ) − n r ( − ) , divergence angle θ d and rotary photon dragging angles θ r ( ± ) are found to have modified with the strength of tunnelling frequencies. The left and right circularly polarized beams show superlominality of group velocities − c /150 and − c /50, respectively, and the divergence angle of 0.050 radian per increment of tunnelling frequency. The maximum of rotary photon drags for both beams is measured θ r ( ± ) = ± 2 micro radian with fractional change of 2%. The output pulses intensities ∣ E out + ( t ) ∣ 2 and ∣ E out − ( t ) ∣ 2 show uniform undistorted shapes with tunnelling frequencies and no energy losses. The results could have significant applications in the fields of quantum optics, photonics, plasmonics and special mode imaging coding technology.

DOI
10.1088/1402-4896/abe584

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Abstract The control and modification of divergence angle and birefringent rotary photon drags under the effect of quantum tunnelling is investigated in this article. The circularly birefringence Δ n = n r ( + ) − n r ( − ) , divergence angle θ d and rotary photon dragging angles θ r ( ± ) are found to have modified with the strength of tunnelling frequencies. The left and right circularly polarized beams show superlominality of group velocities − c /150 and − c /50, respectively, and the divergence angle of 0.050 radian per increment of tunnelling frequency. The maximum of rotary photon drags for both beams is measured θ r ( ± ) = ± 2 micro radian with fractional change of 2%. The output pulses intensities ∣ E out + ( t ) ∣ 2 and ∣ E out − ( t ) ∣ 2 show uniform undistorted shapes with tunnelling frequencies and no energy losses. The results could have significant applications in the fields of quantum optics, photonics, plasmonics and special mode imaging coding technology.
Abstract The birefringence of rotary photon drags is investigated through induced chiral atomic medium. The birefringence of refractive and group indices, divergent angle and rotary photon drags were controlled and modified with detuning, phases and strength of Rabi frequencies of the driving fields. The value of divergent angle oscillated between ±0.01 radian with phases of control fields φ 3,4 and is minimum at φ 3 = π , while maximum at φ 4 = π . The right and left circularly polarized beams are drag clockwise due clockwise spinning of the medium in the normal dispersive region, while the right and left circularly polarized beams are drag clockwise due anticlockwise spinning of the medium in anomalous dispersive region. The maximum rotary photon drags of birefringent beams of light is calculated to ±5 milli radian. The results show advancement in molecular structure, dual image coding and image designing technology.
Abstract The absorption coefficients, refractive/group indices, phase shifts and fractional change of birefringence beams through dynamic chiral atomic medium are investigated under the effect of quantum tunnelling. The birefringence of phase indices Δ n = n r ( + ) − n r ( − ) and group indices Δ n g = n g ( + ) − n g ( − ) are controlled and modified through induced dynamic chiral medium by tunnelling effect. The group indices n g ( ± ) = ± 500 and group velocities v g ( ± ) = ± c / 500 are reported with the tunnelling effect. The maximum change in birefringent phase shifts is calculated to 5 microradian with tunnelling frequency at a speed of v = 10 cm/s of the chiral medium in the right circularly polarized (RCP) and left circularly polarized (LCP) beams. A 60% fractional change in the phase shift of RCP and LCP beams are investigated through induced chiral medium when the medium is at rest and when it is moving with the speed of v = 10 cm/s. These results will play an important role in scatterplate phase shifting interferometry.
Abstract This study examines the phenomenon birefringence of anomalous rotary photon drag in a chiralatomic medium by analyzing the effects on left and right circularly polarized beams. The maximumanomalous rotary photon drags for RCP beam is measured to −6.2 nanoradian and for LCP beamis measured to −11 nanoradian. Detuning and Rabi frequencies of control fields reduce dragon LCP and RCP beams. The anomalous rotary photon drag for RCP beam maximized to −8nanoradian and LCP beam is maximized to −11 nanoradian at the control field Rabi frequency,while at other control Rabi frequency are maximized to −9.5 nanoradian and −30 nanoradianforRCP/LCP beams. The results shows signeficant application imaging coding technology.
Abstract We theoretically investigate birefringence of lateral Goos-Hänchen (GH) shift in a tunnelling chiral atomic medium. The Milnor polynomial of controlled fields and tunnelling modulate the light-mater interactions. We analyze the GH shift for right- and left-circularly polarized (RCP and LCP) beams for varying incident angles. We found a lossless condition R (+) + T (+) = 1 for RCP beams at the incident angle θ i = π /3, while LCP beams shows loss R (−) + T (−) + A (−) = 1 and A (−) = 0.2. The lateral shift in reflection of RCP beam varies in range of 0 λ ≤ S r ( + ) ≤ 60 λ and transmission of RCP beam varies in the range of 0 λ ≤ S t ( + ) ≤ 100 λ at θ i = π /3, while the shift in LCP beam decreases 0 λ ≤ S r ( − ) ≤ 40 λ and transmission increases 0 λ ≤ S t ( − ) ≤ 150 λ for the same parameters. Further, for incident angle θ i = π /4, we found an increase in lateral shifts S r , t ( − ) ≤ 150 λ for RCP and 0 λ ≤ S r , t (
Abstract This paper reports theoretical investigation of birefringence in a chiral medium for the creation of temporal cloaking. The chiral medium splits the input probe beam into left/right circular polarized beams. These left/right circular polarized beams are then controlled and modified within the chiral medium. The left circular polarized beam delays by 24 ns whereas the right circular polarized beam advances by −23 ns at a control field of rabbi frequency 6 γ . This opens a 47 ns time gap for temporal cloaking to hide information without noise corruption and energy loss. The results have potential applications in communication devices for secure propagation of light pulse.
Abstract Subluminal and superluminal propagation of light, and normal and anomalous rotary photon drag are reported in this manuscript using control fields of the Milnor polynomial. A crater-type absorption spectrum is reported, having a central peak at the origin with a variation of positions. The normal and anomalous dispersion are associated with the low and high absorption regions. The group index varies in the range of − 1 × 10 7 ⩽ n g ⩽ 1 × 10 7 . This corresponds to a group velocity of v g = c / n g varying in the range of − 30 m s − 1 ⩽ v g ⩽ 30 m s − 1 . The maximum positive and negative delay times are measured to ± 0.002 s . It is reported that slow light propagation generates normal photon drag and fast light propagation generates anomalous rotary photon drag in a spinning medium. The rotary photon drag varies in the range of − 0.005 rad ⩽ θ d ⩽ 0.005 rad , where both normal and anomalous drag is also observed. The modified results will be useful in optical and biomedical sensors, and imaging and telecommunication technologies.