RF power dependence of refractive index of room temperature sputtered ZnO:Al thin films

Mohanty, Bhaskar Chandra; Yeon, Deuk Ho; Yun, Jae Ho; Cho, Jun Sik; Cho, Yong Soo

doi:10.1007/s00339-013-7831-z

Cited by 4 publications

(2 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…26 The presence of the interference fringes suggests that high-quality thin films with a flat surface and uniform thickness were obtained. 27 From the transmittance spectra of the ZnS thin films, the refractive index n f corresponding to the near-infrared wavelength region with a weak optical absorption was estimated from 28,29 where n s is the refractive index of the substrate (assumed to be 1.65 for PET). 30 T M and T m are the maximum transmittance and minimum transmittance, respectively, on the envelopes drawn over the peaks for interference oscillations in the transmittance spectra.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The presence of the interference fringes suggests that high-quality thin films with a flat surface and uniform thickness were obtained . From the transmittance spectra of the ZnS thin films, the refractive index n f corresponding to the near-infrared wavelength region with a weak optical absorption was estimated from , where n s is the refractive index of the substrate (assumed to be 1.65 for PET) …”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Stretching-Driven Crystal Anisotropy and Optical Modulations of Flexible Wide Band Gap Inorganic Thin Films

Choi

Jang

Kim

et al. 2019

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Strain engineering has been extensively explored for tailoring the material properties and, in turn, improving the device performance of semiconducting thin films. In particular, the effects of strain on the optical properties of these films have attracted considerable research interest, but experimental demonstrations in flexible systems have rarely been reported. Here, we exploited the variable optical properties of flexible ZnS thin films by imposing a controllable external compressive stress during a stretching-driven deposition process. This stress induced crystal anisotropy with an increase in tetragonality, which differs from that of the unstrained cubic ZnS thin films. The refractive index of the films was estimated by means of an envelope method using interference fringes. As a result, the reductions in the refractive index and optical band gap were observed by applying the stretching-driven strains with the resultant compressive stress. The modulated refractive index and its dispersion behavior were further investigated by employing a single-oscillator model to drive subsequent correlative parameters such as dispersion energy, oscillating strength, and high-frequency permittivity. As a proof of concept, an optical lens of ZnS was designed to confirm the effect of in situ stress-mediated optical modulation by detecting the variable focal length with stress.

show abstract