Room-Temperature Lasing from Mie-Resonant Nonplasmonic Nanoparticles

Abstract

Subwavelength particles supporting Mie resonances underpin a strategy in nanophotonics for efficient control and manipulation of light by employing both an electric and a magnetic optically induced multipolar resonant response. Here, we demonstrate that monolithic dielectric nanoparticles made of CsPbBr 3 halide perovskites can exhibit both efficient Mieresonant lasing and structural coloring in the visible and near-IR frequency ranges. We employ a simple chemical synthesis with nearly epitaxial quality for fabricating subwavelength cubes with high optical gain and demonstrate single-mode lasing governed by the Mie resonances from nanocubes as small as 310 nm by the side length. These active nanoantennas represent the most compact room-temperature nonplasmonic nanolasers demonstrated until now.

Observation of Supercavity Modes in Subwavelength Dielectric Resonators

“…The supercavity modes were recently used to develop an efficient laser with subwavelength dimensions, [ 27 ] based on earlier research of compact semiconductor nanolasers made of individual high‐index nanoparticles. [ 28 ]…”

“…The supercavity modes were recently used to develop an efficient laser with subwavelength dimensions, [27] based on earlier research of compact semiconductor nanolasers made of individual high-index nanoparticles. [28] To observe a supercavity mode we manufacture a ceramic cylindrical resonator based on the lanthanum aluminate-calcium titanate (LaAlO 3 -CaTiO 3 ) microwave ceramics with the permittivity ε = 44.8 and loss tangent of the ceramics about 10 −4 . [29] The values of the dielectric material properties were originally provided by the ceramic manufacturer and later specified through measurements of the resonance frequencies of the dielectric cylindrical resonator excited by the loop antenna.…”

Broadband Antireflection with Halide Perovskite Metasurfaces

“…Noteworthy, since the Mie resonances can be excited in various halide perovskites demonstrating outstanding light-emitting and electronic properties, [1,4,10,24,25] the demonstrated approach is applicable for a broad range of materials from this family. However, MAPbBr 3 is one of the most prospective for various optoelectronic applications from lasers to light-emitting devices and solar cells.…”

“…Recently, meta-optics based on halide perovskites nanostructures [1] has attracted a lot of attention due to its numerous applications in structural coloring, [2,3] enhanced luminescence, [4] tunable meta-pixels, [5,6] optical encoding, [7,8] lasing, [9][10][11] speckle-free imaging, [12] and photovoltaics. [13] Various applications of optoelectronic devices based on perovskites require suppression of reflection to achieve higher transparency in the sub-bandgap spectral range, but parasitic reflection limits the efficiency of photovoltaics devices, smart windows, and active glasses.…”

All-dielectric Mie-resonant metaphotonics

“…Pump intensity-dependent emission spectra for three different fluences compared with the lasing threshold: above (red), equal (orange) and below (green) the lasing threshold. (c-e) Adapted with permission from [83].…”