journal article·2019-10

Doping effects on optical and conductive properties of titanium dioxide in terahertz range

Muhammad Mumtaz, M. Ahsan Mahmood, Sabih D. Khan, M. Aslam Zia, Mushtaq Ahmed, Izhar Ahmad

Optical Materials· Volume 96
Publisher page

Abstract

Abstract Terahertz time domain spectroscopy (THz-TDS) has been used to investigate the effect of bismuth doping on the refractive index, absorption coefficient, dielectric constant, and the conductivity of TiO2. Simple effective-medium approximation along with THz-TDS has been utilized for the extraction of these parameters from the composite samples. These values are increasing with dopant concentration. Moreover, the fitting of conductivity with Drude-smith model revealed that the charge carriers are localized and back scattering is the major conductivity mechanism.
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Research context

OpenAlex topics: Terahertz technology and applications · Photonic and Optical Devices · Superconducting and THz Device Technology

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

References (38)

Show source-provided references
1. D. Abbott, X. Zhang, Scanning the Issue: T-Ray Imaging, Sensing, and Retection.
2. Materials for terahertz science and technology10.1038/nmat708 ↗
3. Real-time broadband terahertz spectroscopic imaging by using a high-sensitivity terahertz camera10.1038/srep42540 ↗
4. Far-infrared characteristics of bulk and nanostructured wide-bandgap semiconductors10.1166/jno.2007.302 ↗
5. A review of the terahertz conductivity of bulk and nano-materials10.1007/s10762-012-9905-y ↗
6. Conductivity of zno nanowires, nanoparticles, and thin films using time-resolved terahertz spectroscopy10.1021/jp064399a ↗
7. Ultrabroadband terahertz conductivity of highly doped zno and ito10.1364/OME.5.000566 ↗
8. A review of the electrical properties of semiconductor nanowires: insights gained from terahertz conductivity spectroscopy10.1088/0268-1242/31/10/103003 ↗
9. Investigation of high frequency carrier dynamics of al-doped zno nanowires by terahertz time domain spectroscopy
10. Study of optical and dielectric properties of annealed zno nanoparticles in the terahertz regime10.1007/s11801-009-9217-1 ↗
11. Light polarizer in visible and thz range based on single-wall carbon nanotubes embedded into poly (methyl methacrylate) film10.1088/1612-2011/13/6/065901 ↗
12. Thz imaging and sensing for security applications–explosives, weapons and drugs10.1088/0268-1242/20/7/018 ↗
13. Substrate-integrated millimeter-wave and terahertz antenna technology10.1109/JPROC.2012.2190252 ↗
14. Jha · 2014
15. Titanium dioxide engineered for near-dispersionless high terahertz permittivity and ultra-low-loss10.1038/s41598-017-07019-9 ↗
16. A metamaterial solid-state terahertz phase modulator10.1038/nphoton.2009.3 ↗
17. A magnetic non-reciprocal isolator for broadband terahertz operation10.1038/ncomms2572 ↗
18. Dielectric tube waveguides with absorptive cladding for broadband, low-dispersion and low loss thz guiding10.1038/srep07620 ↗
19. High-refractive-index composite materials for terahertz waveguides: trade-off between index contrast and absorption loss10.1364/JOSAB.28.000917 ↗
20. Current status of oxide dielectric materials for terahertz applications–an overview10.1080/10584587.2015.1102580 ↗
21. Terahertz band-pass filter fabricated by multilayer ceramic technology10.1143/JJAP.45.7499 ↗
22. Argyros · 2013
23. A new perspective for effect of bi on the photocatalytic activity of bi-doped tio210.1016/j.apcatb.2012.05.040 ↗
24. Bismuth doping effect on crystal structure and photodegradation activity of bi–tio2 nanoparticles10.7567/JJAP.56.04CJ01 ↗
25. Novel titanium dioxide ceramics containing bismuth and antimony10.1016/j.jmat.2017.01.001 ↗
26. Carrier localization and cooling in dye-sensitized nanocrystalline titanium dioxide10.1021/jp025844e ↗
27. Electron transport in tio 2 probed by thz time-domain spectroscopy10.1103/PhysRevB.69.081101 ↗
28. Local field effects on electron transport in nanostructured tio2 revealed by terahertz spectroscopy10.1021/nl0600225 ↗
29. Terahertz depolarization effects in colloidal tio2 films reveal particle morphology10.1021/jp406897y ↗
30. Tuning the conduction mechanism in niobium-doped titania nanoparticle networks10.1021/jp200822y ↗
31. Investigation of the optical and conductive properties of antimony-doped titanium dioxide using terahertz time-domain spectroscopy10.1088/1612-202X/aad87d ↗
32. Synthesizing and comparing the photocatalytic properties of high surface area rutile and anatase titania nanoparticles10.1111/j.1151-2916.2003.tb03539.x ↗
33. M. V. Swapna, K. R. Haridas, The Chemist Volume 88— Number 2 Print Download.
34. Structural characterization and optical property of tio2 powders prepared by the sol–gel method10.1016/j.ceramint.2014.01.083 ↗
35. Bi4ti3o12/tio2 heterostructure: synthesis, characterization and enhanced photocatalytic activity10.1016/j.ceramint.2013.05.007 ↗
36. Investigation of dielectric properties of polymers and their discrimination using terahertz time-domain spectroscopy with principal component analysis10.1177/0003702816675361 ↗
37. Carrier dynamics in semiconductors studied with time-resolved terahertz spectroscopy10.1103/RevModPhys.83.543 ↗
38. Classical generalization of the drude formula for the optical conductivity10.1103/PhysRevB.64.155106 ↗