Rattling of Oxygen Ions in a Sub-Nanometer-Sized Cage Converts Terahertz Radiation to Visible Light

ACS Nano
Yoshitake TodaHideo Hosono

Abstract

A simple and robust approach to visualization of continuous wave terahertz (CW-THz) light would open up opportunities to couple physical phenomena that occur at fundamentally different energy scales. Here we demonstrate how nanoscale cages of Ca12Al14O33 crystal enable conversion of CW-THz radiation to visible light. These crystallographic cages are partially occupied with weakly bonded oxygen ions and give rise to a narrow conduction band that can be populated with localized, yet mobile electrons. CW-THz light excites a nearly stand-alone rattling motion of the encaged oxygen species, which promotes electron transfer from them to the neighboring vacant cages. When the power of CW-THz light reaches tens of watts, the coupling between forced rattling in the confined space, electronic excitation and ionization of oxygen species, and corresponding recombination processes result in emission of bright visible light.

References

Oct 1, 1985·Physical Review A: General Physics·M B SchulmanL W Anderson
Dec 15, 1994·Physical Review. B, Condensed Matter·P E Blöchl
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Jan 31, 2002·Journal of the American Chemical Society·Katsuro HayashiHideo Hosono
Jan 25, 2007·Journal of the American Chemical Society·Peter V SushkoHideo Hosono
Feb 3, 2007·The Journal of Physical Chemistry. B·Katsuro HayashiHideo Hosono
Mar 23, 2007·Nano Letters·Sung Wng KimHideo Hosono
Dec 22, 2011·Nature Communications·H HiroriK Tanaka
Aug 27, 2013·Physical Review Letters·K ShinokitaK W West
Mar 26, 2014·Nature Communications·Katsuro HayashiHideo Hosono
Jun 16, 2015·Nature Nanotechnology·Young Duck KimYun Daniel Park

❮ Previous
Next ❯

Citations

Nov 28, 2020·Physical Chemistry Chemical Physics : PCCP·Sergey N ShkerinAnna S Tolkacheva
Feb 20, 2021·Chemical Reviews·Hideo Hosono, Masaaki Kitano

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cardiac Conduction System

The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.