Imaginary modulation inducing giant spatial Goos–Hänchen shifts in one-dimensional defective photonic lattices

Journal Article · Mon Apr 15 04:00:00 EDT 2019 · Optical and Quantum Electronics

DOI:https://doi.org/10.1007/S11082-019-1828-6· OSTI ID:22950316

Zhao, Dong; Zhong, Dong; Hu, Yonghong ^[1]; Ke, Shaolin ^[2]; Liu, Weiwei ^[3]

---

1. Hubei University of Science and Technology (China)
2. Wuhan Institute of Technology, Hubei Key Laboratory of Optical Information and Pattern Recognition (China)
3. Huazhong University of Science and Technology, Wuhan National Laboratory for Optoelectronics and School of Physics (China)

We investigate the spatial Goos–Hänchen (GH) shifts in one-dimensional defective photonic lattices by modulating the imaginary part of refractive index, namely, the imaginary modulation. The reflection spectra possess two singular points under imaginary modulation when the reflectance is infinite or vanishing. These two points correspond to the coherent-perfect-absorption-laser (CPA-LP) point and defect mode (MD) in the parameter space composed of the incident angle and refractive index. We show the spatial GH shifts are extremely giant in the vicinity of CPA-LP and MD as the phase of reflection coefficients dislocate. Moreover, the GH shifts are sensitive to the incident angle and the refractive index of defect. The sensitivity coefficients can reach as high as 10{sup 6}. The study may find potential applications in highly sensitive sensors.

• OSTI ID: 22950316
• Journal Information: Optical and Quantum Electronics, Journal Name: Optical and Quantum Electronics Journal Issue: 4 Vol. 51; ISSN OQELDI; ISSN 0306-8919
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
LASERS
MODULATION
POTENTIALS
REFLECTION
REFRACTIVE INDEX
SENSITIVITY
SENSORS
SPECTRA