PMID- 32749317
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200805
IS  - 1539-4522 (Electronic)
IS  - 1559-128X (Linking)
VI  - 59
IP  - 22
DP  - 2020 Aug 1
TI  - Tunable terahertz hyperbolic metamaterial slabs and super-resolving hyperlenses.
PG  - G64-G70
LID - 10.1364/AO.391952 [doi]
AB  - Terahertz (THz) optics offer the potential to image through objects that are 
      opaque for visible wavelengths and provide unique spectroscopic signatures for a 
      variety of materials and quantum processes. However, the resolution of THz images 
      suffers from the long wavelength of THz light compared to visible. Hyperbolic 
      metamaterials provide a possible solution through the creation of super-resolving 
      lenses and offer greater flexibility in effective refractive index than can be 
      provided by natural materials. Most hyperbolic metamaterials function in a narrow 
      bandwidth due to their resonant nature. In search of a broadband material, we 
      simulate a temperature-tunable hyperbolic metamaterial composed of a multilayer 
      stack of alternating layers of high-density polyethylene (HDPE) and indium 
      antimonide (InSb). At a single temperature, negative effective medium 
      permittivity is found over a small bandwidth of 0.09 THz, but by tuning over a 
      40 degrees C temperature range the bandwidth is increased dramatically to 1.0 THz. 
      Furthermore, we compute the transmission and negative refraction through the 
      multilayer stack and simulate the imaging properties of curved hyperlens stacks 
      using slits as test objects, achieving resolutions as small as 20 microm at 130 microm 
      wavelength, far below the half-wavelength diffraction limit.
FAU - Zhang, Hui
AU  - Zhang H
FAU - Jiao, Zhiyong
AU  - Jiao Z
FAU - Mcleod, Euan
AU  - Mcleod E
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Appl Opt
JT  - Applied optics
JID - 0247660
SB  - IM
EDAT- 2020/08/05 06:00
MHDA- 2020/08/05 06:01
CRDT- 2020/08/05 06:00
PHST- 2020/08/05 06:00 [entrez]
PHST- 2020/08/05 06:00 [pubmed]
PHST- 2020/08/05 06:01 [medline]
AID - 432138 [pii]
AID - 10.1364/AO.391952 [doi]
PST - ppublish
SO  - Appl Opt. 2020 Aug 1;59(22):G64-G70. doi: 10.1364/AO.391952.