Wavelength-tunable organic semiconductor lasers based on elastic distributed feedback gratings

Abstract

Wavelength-tunable organic semiconductor lasers based on mechanically stretchable polydimethylsiloxane (PDMS) gratings were developed. The intrinsic stretchability of PDMS was explored to modulate the period of the distributed feedback gratings for fine tuning the lasing wavelength. Notably, elastic lasers based on three typical light-emitting molecules show comparable lasing threshold values analogous to rigid devices and a continuous wavelength tunability of about 10 nm by mechanical stretching. In addition, the stretchability provides a simple solution for dynamically tuning the lasing wavelength in a spectral range that is challenging to achieve for inorganic counterparts. Our work has provided a simple and efficient method of fabricating tunable organic lasers that depend on stretchable distributed feedback gratings, demonstrating a significant step in the advancement of flexible organic optoelectronic devices.

The Role of the Bottom Oxide Layer in Oxide‐Metal‐Oxide (OMO) Electrode for Stretchable Organic Light‐Emitting Diodes

“…The OLED fabricated on this elastomer with PDMS substrate exhibited almost constant brightness under the strain of 20–50%. However, materials employed for intrinsic stretchable electrode and substrate are limited [ 3 , 4,5,6 ] and is difficult to implement for large area display or lighting.…”

Device parameter to evaluate exciton energy transfer in organic whispering-gallery-mode microresonators and its dependence on the amplified spontaneous emission threshold

“…Numerous studies have been thus far conducted on the spectra and thresholds, including recent advances like multiphoton excited ASE 20 and wavelength tuning. 21 ) For the microresonator, we used stacked layers of a small molecular energy donor and a small molecular energy acceptor. The distance between the energy donor and acceptor can be easily controlled by vacuum evaporation; thereby, the magnitude of the radiative 16,22 and Fo ¨rster [23][24][25][26][27] energy transfer can feasibly be controlled even in multicomponent WGM resonators.…”

Exceptionally large fracture strength and stretchability of 2D ReS2 and ReSe2

“…Flexible and stretchable nano materials are desired in many advanced applications, such as biomedical applications, 37 thermal management layers, 38 portable nanogenerators, 39 and electronic components. [40][41][42][43] Therefore, the insights gained here will facilitate the integration of 2D Re dichalcogenides into such applications.…”