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Title: Integrated digital metamaterials enables ultra-compact optical diodes

We applied nonlinear optimization to design integrated digital metamaterials in silicon for unidirectional energy flow. Two devices, one for each polarization state, were designed, fabricated, and characterized. Both devices offer comparable or higher transmission efficiencies and extinction ratios, are easier to fabricate, exhibit larger bandwidths and are more tolerant to fabrication errors, when compared to alternatives. Furthermore, each device footprint is only 3μm × 3μm, which is the smallest optical diode ever reported. To illustrate the versatility of digital metamaterials, we also designed a polarization-independent optical diode.
Authors:
 [1] ;  [2] ;  [1]
  1. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Electrical and Computer Engineering
  2. Univ. of Utah, Salt Lake City, UT (United States). Utah Nanofabrication Facility
Publication Date:
Grant/Contract Number:
EE0005959
Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 23; Journal Issue: 8; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Univ. of Utah, Salt Lake City, UT (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1222303
Alternate Identifier(s):
OSTI ID: 1184792