Properties and prospects of blue–green emitting II–VI‐based monolithic microcavities

Abstract

1 Introduction In the last years new ways to manipulate the light-matter interaction were found by modifying photonic components which confine light on the wavelength scale by means of semiconductor microcavities (MCs) [1]. The modified optical density of states produced by photonic structuring allows emission and absorption rates to be enhanced or suppressed. This is known as the Purcell effect which can be used to control the spontaneous emission [2]. Semiconductor MCs appear to a be highly attractive systems for the realization of a new generation of optoelectronic devices, polariton devices, optical switches and spin-memory elements. Several types of solid state MCs [1], including micropillars [3,4], microdisks [5,6] and photonic crystals [7,8], offer very small mode volumes V in combination with high quality factors Q. These factors describe the ability of the cavity to confine the light.

Optical Study of ZnTe-Based 2D and 0D Photonic Structures Containing CdTe/ZnTe Quantum Dots

“…The spectrum measured at 65 K presents well separated eigenmodes of the pillars. At this temperature, the individual QD lines broaden due to the interaction with phonons and merge into a continuous background, which allows the cavity modes to appear in the spectrum [2]. These modes were observed for all the micropillars with diameters down to 1 µm, proving a high precision of the FIB processing.…”

Optical properties of wide‐bandgap monolithic pillar microcavities with different geometries

“…A ZnSSe λ-cavity contains a single sheet of CdSe/ZnSSe QDs embedded into additional MgS barriers. Distributed Bragg reflectors (DBRs) made of ZnSSe as high-index and MgS/ZnCdSe short-period superlattices as low-index layers are used as the cavity mirrors (details in [13]). Pillar MCs with diameters between 500 nm and 2.5 µm have been prepared from the epitaxial samples by use of focused-ion-beam milling [14].…”

Coherent oscillations between orbital angular momentum polariton states in an elliptic resonator

“…16 These patterns are similar to the optical mode profiles observed in cylindrical CdTe micropillars. 17 A spatially resolved spectrum of the photoluminescence emitted by the confined states in a 10 μm mean diameter trap under nonresonant pumping is shown in Fig. 1(c).…”

“…2(a). Spatially resolved spectroscopy 16,17,[19][20][21][22] allowed to measure an energy splitting between |x and |y of E = 50 ± 25 μeV. These eigenstates can be selectively excited using resonant cw excitation.…”