Hyperbolic Dispersion Dominant Regime Identified through Spontaneous Emission Variations near Metamaterial Interfaces

Abstract

optoelectronic devices, [6][7][8] chirality, [9,10] magnetism, [11][12][13] and surface-enhanced Raman spectroscopy. [14][15][16] Controlling the structure of an environment is known to impact on photophysical properties of semiconductors. The effects can be revealed through alterations of energy and charge transfers, [17][18][19] spectral shifts and amplitude variation of both absorption and transmission, [20][21][22][23] as well as polarization, [24] and emission amplitude. [25][26][27][28] In this context, engineering spontaneous emission rate with elaborated nanostructures is of particular interest and the effect of various structures has been explored including confinement, [28][29][30] plain metal films and metal

Purcell Enhancement and Wavelength Shift of Emitted Light by CsPbI3 Perovskite Nanocrystals Coupled to Hyperbolic Metamaterials

“… 26 − 31 For quantum information applications, it is important to increase the photon emission rate (or radiative rate) of a QE, which is commonly achieved by embedding single photon nanomaterials into optical microcavities. 32 − 36 The photon emission rate enhancement has been experimentally investigated using periodical metal-dielectric structures for different types of single emitters (dye molecules, metal–organic complexes, and quantum dots), 37 − 40 as also confirmed theoretically. 41 , 42 It is worth noting the study of recombination rate enhancement using a film of CsPbBr 3 PNCs deposited by spin coating on top of single and double metal–insulator–metal cavities.…”

Hyperbolic Metamaterials and Metasurfaces: Fundamentals and Applications

“…Several experiments have successfully demonstrated the spontaneous emission modification and related applications using HMMs . For example, Figure a depicts the dependent relation of the CdSe/ZnS quantum dot lifetime dispersed on the metal–dielectric multilayer structures to emitting wavelength.…”

“…Compared with other optical metamaterials, like chiral and split ring resonator–based metamaterials, HMMs have advantages of relative ease of fabrication at optical frequencies, broadband nonresonant and 3D bulk responses, and flexible wavelength tunability. As a result, HMMs have attracted widespread interest and become a good multifunctional platform for many exotic applications, such as optical negative refraction and light beam steering, subdiffraction‐limited imaging and nanolithography, spontaneous and thermal emission engineering, ultrasensitive optical, biological, and chemical sensing, omnidirectional and broadband optical absorption …”

Optical-field driven charge-transfer modulations near composite nanostructures

“…Actively controlling the time scale over which charge separation and recombination occur is critical especially in the solid state, which is relevant to most optoelectronic devices and circuitry. To open the path toward light-based technologies with remotely tunable charge-transfer dynamics, the underlaying cause of relevant phenomena [25][26][27][28][29][30][31][32] need to be both identified and rationalized.…”

“…To address this challenge, we used non-invasive time-resolved spectroscopies to probe a range of ultra-fast phenomena. Transient absorption allows monitoring of charge-transfer dynamics between donors and acceptors [26][27][28][29]33,36,[38][39][40][41][42][43][44] . Surface photovoltage measurements provide insights on the photon-induced electrical-potential change across interfaces 45,46 .…”